Aimco - 10-K annual report

Apartment Investment and Management Company, or Aimco, is a Maryland corporation incorporated on January 10, 1994. We are a self-administered and self-managed real estate investment trust, or REIT, engaged in the acquisition, ownership, management and redevelopment of apartment properties. As of December 31, 2006, we owned or managed a real estate portfolio of 1,256 apartment properties containing 216,413 apartment units located in 46 states, the District of Columbia and Puerto Rico. Based on apartment unit data compiled by the National Multi Housing Council, as of January 1, 2006, we were the largest owner of apartment properties in the United States. Our portfolio includes garden style, mid-rise and high-rise properties.

We own an equity interest in, and consolidate the majority of, the properties in our owned real estate portfolio. These properties represent the consolidated real estate holdings in our financial statements, which we refer to as consolidated properties. In addition, we have an equity interest in, but do not consolidate for financial statement purposes, certain properties that are accounted for under the equity method. These properties represent our investment in unconsolidated real estate partnerships in our financial statements, which we refer to as unconsolidated properties. Additionally, we manage (both property and asset) but do not own an equity interest in other properties, although in certain cases we may indirectly own generally less than one percent of the operations of such

Through our wholly-owned subsidiaries, AIMCO-GP, Inc. and AIMCO-LP, Inc., we own a majority of the ownership interests in AIMCO Properties, L.P., which we refer to as the Aimco Operating Partnership. As of December 31, 2006, we held approximately a 90% interest in the common partnership units and equivalents of the Aimco Operating Partnership. We conduct substantially all of our business and own substantially all of our assets through the Aimco Operating Partnership. Interests in the Aimco Operating Partnership that are held by limited partners other than Aimco are referred to as “OP Units.” OP Units include common OP Units, partnership preferred units, or preferred OP Units, and high performance partnership units, or High Performance Units. Generally after a holding period of twelve months, holders of common OP Units may redeem such units for cash or, at the Aimco Operating Partnership’s option, Aimco Class A Common Stock, which we refer to as Common Stock. At December 31, 2006, we had 96,820,252 shares of our Common Stock outstanding and the Aimco Operating Partnership had 10,135,562 common OP Units and equivalents outstanding for a combined total of 106,955,814 shares of Common Stock and OP Units outstanding (excluding preferred OP Units).

Since our initial public offering in July 1994, we have completed numerous transactions, expanding our portfolio of owned or managed properties from 132 properties with 29,343 apartment units to 1,256 properties with 216,413 apartment units as of December 31, 2006. These transactions have included purchases of properties and interests in entities that own or manage properties, as well as corporate mergers.

Except as the context otherwise requires, “we,” “our,” “us” and the “Company” refer to Aimco, the Aimco Operating Partnership and their consolidated entities, collectively. As used herein, and except where the context otherwise requires, “partnership” refers to a limited partnership or a limited liability company and “partner” refers to a limited partner in a limited partnership or a member in a limited liability company.

Our Annual Report onForm 10-K,our Quarterly Reports onForm 10-Q,our Current Reports onForm 8-Kand any amendments to any of those reports that we file with the Securities and Exchange Commission are available free of charge as soon as reasonably practicable through our website at www.aimco.com. The information contained on our website is not incorporated into this Annual Report. Our Common Stock is listed on the New York Stock Exchange under the symbol “AIV.” In 2006, our chief executive officer submitted his annual corporate governance listing standards certification to the New York Stock Exchange, which certification was unqualified.

We operate in two reportable segments: real estate (owning and operating apartments) and investment management business (providing property management and other services relating to the apartment business to third parties and affiliates). For further information on these segments, see Note 16 of the consolidated financial statements in Item 8, and Management’s Discussion and Analysis in Item 7.

Our principal objective is to increase long-term stockholder value, which we believe results from increasing asset values, increasing operating cash flows and long-term, predictable Funds From Operations, or FFO (as defined by the National Association of Real Estate Investment Trusts), less capital spending for replacements. For a

We strive to meet our objectives by focusing on property operations, generation of fees, portfolio management, reinvestment in properties, increasing land values through entitlements, managing our cost of capital by using leverage that is largely long-term, non-recourse and property specific, and managing our general and administrative costs through increasing productivity.

We divide property operations into two business components: conventional and affordable. Our conventional operations, which are market-rate apartments with rents paid by the resident, include 469 properties with 135,289 units. Aimco Capital conducts our affordable operations of 336 properties with 38,934 units, which typically are apartments with rents frequently subsidized or paid by a government agency.

Our property operations are characterized by diversification of product, location and price point. We operate a broad range of property types, from suburban garden-style to urban high-rise properties in 46 states, the District of Columbia and Puerto Rico at a broad range of average monthly rental rates, with most between $500 and $1,100 per month, and reaching as high as $6,500 per month at some of our premier properties. This geographic diversification insulates us, to some degree, from inevitable downturns in any one market.

Our conventional operations are organized into four divisions, each of which is supervised by a Division Vice President, or DVP, and are furthersub-dividedinto 17 regional operating centers, or ROCs. As changes in our portfolio occur, we reevaluate this structure. A Regional Vice President, or RVP, supervises each ROC. The ROCs are generally smaller business units with specialized operational, financial and human resource leadership. We seek to improve the operating results from our property operations by, among other methods, combining centralized financial control and uniform operating procedures with localized property management decision-making and market knowledge. To manage our nationwide portfolio more efficiently and to increase the benefits from our local management expertise, we have given direct responsibility for operations to the RVP with oversight from extensive regular reviews with senior management. To enable the RVPs to focus on sales and service, as well as improve financial control and budgeting, we have dedicated a regional financial officer to support each RVP. In addition, our construction services group handles all work on site beyond routine maintenance, thus reducing the need for RVPs to spend time on oversight of construction projects. We continue to improve our corporate-level oversight of conventional property operations by developing better systems, standardizing business goals, operational measurements and internal reporting, and enhancing financial controls over field operations. Our objectives are to focus on the areas discussed below:

We are among the largest owners and operators of affordable properties in the United States. Aimco Capital was organized to focus on our affordable housing properties, the operations of which are most often subsidized or financed by the United States Department of Housing and Urban Development, or HUD, state housing agencies or tax credit financing, and is led by a management team dedicated to this sector. Aimco Capital operates our affordable properties through three ROCs. Affordable properties tend to have stable rents and occupancy due to government subsidies and thus are much less affected by market circumstances.

Aimco Capital also generates activity fees from transactions related to affordable holdings (including tax credit redevelopments, syndications, dispositions and refinancings), and asset management income from the financial management of our owned and operated affordable portfolio as well as two other large portfolios for which we provide asset management services only.

We view our conventional property portfolio in terms of “core” and “non-core” properties. Core properties are those properties that are located in markets where population and employment growth are expected to exceed national trends and where we believe there is potential for long-term growth at higher rates of return. Our core operations are focused in 27 markets, located primarily in coastal states as well as the Rocky Mountain region and Chicago. We plan to exit certain Texas and Midwest markets where the average four-year growth rate is projected to be below the average of the remainder of the core portfolio. At December 31, 2006, we had 270 conventional core properties, which generally we intend to hold and improve over the long-term. Within our core portfolio, the largest single market (Washington, D.C.) contributed approximately 10%, and the five largest markets (Washington, D.C., Southern California, New England, Philadelphia and Miami-Fort Lauderdale) together contributed approximately 38%, to income before depreciation and interest expense, or net operating income. At December 31, 2006, we had 199 conventional non-core properties, which we generally intend to hold for investment for the intermediate term. Non-core properties are those properties located within the 26 markets we intend to exit or in less favored locations within the 27 markets that comprise our core portfolio. We exited six markets in 2006. During 2007, we expect to exit an additional eight markets and over the next several years we expect to exit the remaining markets in which we hold our non-core properties.

Portfolio management includes expanding our core portfolio through acquisitions of properties located in markets where our core portfolio is concentrated. We specifically seek investments in a variety of asset qualities and

In 2006, we completed direct acquisitions of nine conventional core properties, containing approximately 1,700 residential units for an aggregate purchase price of approximately $177 million (including transaction costs). These properties are located in California, Florida and North Carolina. In addition, we originated approximately $100 million in loans secured by 87 properties with 1,597 residential units and 42 commercial spaces in the West Harlem District of New York City. In conjunction with this loan agreement, we obtained an option to purchase some or all of the properties during the next ten years. We also acquired additional interests in 48 partnerships for approximately $18 million (including transaction costs).

Portfolio management also includes dispositions of properties located within markets we intend to exit, properties in less favored locations within the 27 markets that comprise our core portfolio or properties that do not meet our long-term investment criteria. Additionally, from time to time, we may dispose of certain core properties that are consistent with our long-term investment strategy but offer attractive returns, such as in sales to buyers who intend to convert the properties to condominiums. The sales of core and non-core properties partially fund our acquisitions and capital improvements on our existing properties. In 2006, we sold 63 non-core properties and two core properties generating net cash proceeds to us, after repayment of existing debt, payment of transaction costs and distributions to limited partners, of $505 million.

The portfolio management strategy for Aimco Capital is similar to that of our Conventional portfolio. Aimco Capital seeks to dispose of properties that are inconsistent with our long-term investment strategy and Aimco Capital’s operations. During 2006, we sold 23 non-core properties from within the Aimco Capital portfolio, generating net cash proceeds to us, after repayment of existing debt, payment of transaction costs and distributions to limited partners, of $19.5 million. At December 31, 2006 within the Aimco Capital portfolio, we had 237 consolidated properties, a majority of which are non-core properties that we generally intend to hold for investment for the intermediate term. During 2007, we intend to sell approximately the same number of Aimco Capital properties as we sold in 2006.

We have the opportunity to improve land values by seeking new entitlements for many properties. Entitlements provide us the opportunity to enhance the value of our existing portfolio by obtaining local governmental approvals to increase density and add dwelling or residential units to a site. Also, we seek to add incremental value through redevelopment of existing units and excess land sales. We achieved new entitlements on five projects, with approximately 2,000 units, in 2006. We currently have approximately 20 entitlement projects underway or under review. These properties are typically well located and in many cases were built 30 or more years ago.

We believe that the physical condition and amenities of our apartment properties are important factors in our ability to maintain and increase rental rates. In 2006, we spent $76.6 million, or $535 per owned apartment unit, for Capital Replacements, which represent the share of expenditures that are deemed to replace the consumed portion of acquired capital assets. Additionally, we spent $99.2 million for Capital Improvements, which are non-redevelopment capital expenditures that are made to enhance the value, profitability or useful life of an asset from its original purchase condition.

In addition to maintenance and improvements of our properties, we focus on the redevelopment of certain properties each year. We believe redevelopment of certain properties in superior locations provides advantages overground-updevelopment, enabling us to generate rents comparable to new properties with relatively lower financial risk, in less time and with reduced delays associated with governmental permits and authorizations. We undertake two types of redevelopment projects: major projects, where a substantial number of all available units are vacated for significant renovations to the property; and moderate projects, where there is significant renovation, such as exteriors, common areas or unit improvements, typically done upon lease expirations without the need to vacate units on any wholesale or substantial basis. We have a specialized Redevelopment and Construction Services Group, which includes engineers, architects and construction managers, to oversee these projects. As of December 31, 2006, we had 54 projects at various stages of redevelopment. Of the 54 projects, 45 are conventional properties one major project and 44 moderate projects) and nine are affordable properties. During 2006, redevelopment expenditures totaled $258.6 million, of which our share totaled $230.8 million, and we completed three projects as well as interior upgrades or new construction on approximately 2,300 conventional units. Total redevelopment expenditures for our 45 active conventional projects will be approximately $493 million, of which approximately $296 million remains to be spent. Total redevelopment expenditures for our nine affordable redevelopments will be approximately $68 million, of which approximately $30 million remains to be spent, most of which will be funded by third-party tax credit equity and tax-exempt debt. In 2007, we plan to invest between $275 and $325 million in conventional redevelopment projects that will affect approximately 79 properties with over 30,000 units. Additionally, in 2007 redevelopment expenditures on affordable properties will be approximately $36 million, predominantly funded by third-party tax credit equity, affecting more than 15 properties with more than 1,800 units.

We are focused on minimizing our cost of capital. We have a deliberate policy of using non-recourse property debt. The lower risk inherent in non-recourse property debt permits us to operate with higher debt leverage and a lower weighted average cost of capital. During 2006, we closed loans totaling $1,224.6 million at an average interest rate of 5.66%, which included the refinancing of loans totaling $586.3 million with prior interest rates averaging 6.34%.

Over the past several years, we had growth in our general and administrative spending as a result of the building of our infrastructure in certain areas in which we had needs, including, operational systems, information technology and other automation, human resources, and expanded accounting, legal, and financial planning and analysis functions. During 2006, we reduced general and administrative expenses before variable compensation by approximately $8 million as compared to 2005. We are focused on continued containment of this spending going forward through enhanced productivity and process improvements.

In attracting and retaining residents to occupy our properties we compete with numerous other housing alternatives. Our properties compete directly with other rental apartments, as well as with condominiums and single-family homes that are available for rent or purchase in the markets in which our properties are located. Principal factors of competition include rent or price charged, attractiveness of the location and property and quality and breadth of services. The number of competitive properties in a particular area has a material effect on our ability to lease apartment units at our properties and on the rents we charge. Additionally, we compete with other real estate investors, including other apartment REITs, pension and investment funds, partnerships and investment companies in acquiring, redeveloping and managing apartment properties. This competition affects our ability to acquire properties we want to add to our portfolio and the price that we pay in such acquisitions.

We have elected to be taxed as a REIT under the Internal Revenue Code of 1986, as amended, which we refer to as the Code, commencing with our taxable year ended December 31, 1994, and intend to continue to operate in such

Even if we qualify as a REIT, we may be subject to United States Federal income and excise taxes in various situations, such as on our undistributed income. We also will be required to pay a 100% tax on any net income on non-arm’s length transactions between us and a TRS (described below) and on any net income from sales of property that was property held for sale to customers in the ordinary course. We and our stockholders may be subject to state or local taxation in various state or local jurisdictions, including those in which we transact business or our stockholders reside. In addition, we could also be subject to the alternative minimum tax, or AMT, on our items of tax preference. Any taxes imposed on us could reduce our operating cash flow and net income. The state and local tax laws may not conform to the United States Federal income tax treatment.

Certain of our operations (property management, asset management, risk, etc.) are conducted through taxable REIT subsidiaries, each of which we refer to as a TRS. A TRS is a C-corporation that has not elected REIT status and as such is subject to United States Federal corporate income tax. We use TRS entities to facilitate our ability to offer certain services and activities to our residents, as these services and activities generally cannot be offered directly by the REIT.

Apartment properties are subject to various laws, ordinances and regulations, including regulations relating to recreational facilities such as swimming pools, activity centers and other common areas. Changes in laws increasing the potential liability for environmental conditions existing on properties or increasing the restrictions on discharges or other conditions, as well as changes in laws affecting development, construction and safety requirements, may result in significant unanticipated expenditures, which would adversely affect our net income and cash flows from operating activities. In addition, future enactment of rent control or rent stabilization laws or other laws regulating multifamily housing may reduce rental revenue or increase operating costs in particular markets.

Various Federal, state and local laws subject property owners or operators to liability for management, and the costs of removal or remediation, of certain hazardous substances present on a property. Such laws often impose liability without regard to whether the owner or operator knew of, or was responsible for, the release or presence of the hazardous substances. In connection with the ownership, operation and management of properties, we could potentially be liable for environmental liabilities or costs associated with our properties or properties we acquire or manage in the future. These and other risks related to environmental matters are described in more detail in Item 1A, “Risk Factors.”

Our primary lines of insurance coverage are property, general liability, and workers’ compensation. We believe that our insurance coverages adequately insure our properties against the risk of loss attributable to fire, earthquake, hurricane, tornado, flood and other perils and adequately insure us against other risk. Our coverage includes deductibles, retentions and limits that are customary in the industry. We have established loss prevention, loss mitigation, claims handling, litigation management and loss reserving procedures to manage our exposure.

We currently have approximately 6,000 employees, of which approximately 4,700 are at the property level, performing variouson-sitefunctions, with the balance managing corporate and regional operations, including investment and debt transactions, legal, financial reporting, accounting, information systems, human resources and

The risk factors noted in this section and other factors noted throughout this Annual Report, describe certain risks and uncertainties that could cause our actual results to differ materially from those contained in any forward-looking statement.

Our ability to make payments to our investors depends on our ability to generate net operating income in excess of required debt payments and capital expenditure requirements. Net operating income may be adversely affected by events or conditions beyond our control, including:

We intend to continue to redevelop certain of our properties. These activities are subject to the following risks:

The selective acquisition of properties is a component of our strategy. However, we may not be able to complete transactions successfully in the future. Although we seek to acquire, properties only when such activities increase our net income, Funds From Operations or net asset value, such transactions may fail to perform in accordance with our expectations.

Our strategy is generally to incur debt to increase the return on our equity while maintaining acceptable interest coverage ratios. For the year ended December 31, 2006, we had a ratio of free cash flow (net operating income less spending for capital replacements) to combined interest expense and preferred stock dividends of 1.6:1. Our organizational documents do not limit the amount of debt that we may incur, and we have significant amounts of debt outstanding. Payments of principal and interest may leave us with insufficient cash resources to operate our properties or pay distributions required to be paid in order to maintain our qualification as a REIT. We are also subject to the risk that our cash flow from operations will be insufficient to make required payments of principal and interest, and the risk that existing indebtedness may not be refinanced or that the terms of any refinancing will not be as favorable as the terms of existing indebtedness. If we fail to make required payments of principal and interest on secured debt, our lenders could foreclose on the properties securing such debt, which would result in loss of income and asset value to us. As of December 31, 2006, substantially all of the properties that we owned or controlled were encumbered by debt.

As of December 31, 2006, we had approximately $1,663.4 million of variable-rate indebtedness outstanding. Of the total debt subject to variable interest rates, floating rate tax-exempt bond financing was $640.6 million. Floating rate tax-exempt bond financing is benchmarked against the BMA Index, which since 1981 has averaged 68% of the30-day LIBOR rate. If this relationship continues, an increase in30-day LIBOR of 1.0% (0.68% in tax-exempt interest rates) would result in our income before minority interests and cash flows being reduced by $14.6 million on an annual basis. This would be offset by variable rate interest income earned on certain assets, including cash and cash equivalents and notes receivable, as well as interest that is capitalized on a portion of this variable rate debt incurred in connection with our redevelopment activities. Considering these offsets, the same increase in30-day LIBOR would result in our income before minority interests being reduced by $4.4 million on an annual basis.

Some of our debt and other securities contain covenants that restrict our ability to make distributions or other payments to our investors unless certain financial tests or other criteria are satisfied. Our credit facility provides, among other things, that we may make distributions to our investors during any four consecutive fiscal quarters in an aggregate amount that does not exceed the greater of 95% of our Funds From Operations for such period or such amount as may be necessary to maintain our REIT status. Our outstanding classes of preferred stock prohibit the payment of dividends on our Common Stock if we fail to pay the dividends to which the holders of the preferred stock are entitled.

Our apartment properties compete for residents with other housing alternatives, including other rental apartments, condominiums and single-family homes that are available for rent, as well as new and existing condominiums and single-family homes for sale. Competitive residential housing in a particular area could adversely affect our ability to lease apartments and to increase or maintain rental rates.

All of our properties are owned, and all of our operations are conducted, by the Aimco Operating Partnership and our other subsidiaries. As a result, we depend on distributions and other payments from our subsidiaries in order to satisfy our financial obligations and make payments to our investors. The ability of our subsidiaries to make such distributions and other payments depends on their earnings and may be subject to statutory or contractual limitations. As an equity investor in our subsidiaries, our right to receive assets upon their liquidation or reorganization will be effectively subordinated to the claims of their creditors. To the extent that we are recognized as a creditor of such subsidiaries, our claims may still be subordinate to any security interest in or other lien on their assets and to any of their debt or other obligations that are senior to our claims.

Real estate investments are relatively illiquid and cannot always be sold quickly. Thus, we may not be able to change our portfolio promptly in response to changes in economic or other market conditions. Our ability to dispose of assets in the future will depend on prevailing economic and market conditions. This could have a material adverse effect on our financial condition or results of operations.

We have engaged in, and intend to continue to engage in, the selective acquisition of interests in partnerships that own apartment properties. In some cases, we have acquired the general partner of a partnership and then made an offer to acquire the limited partners’ interests in the partnership. In these transactions, we may be subject to litigation based on claims that we, as the general partner, have breached our fiduciary duty to our limited partners or that the transaction violates the relevant partnership agreement or state law. Although we intend to comply with our fiduciary obligations and the relevant partnership agreements, we may incur additional costs in connection with the defense or settlement of this type of litigation. In some cases, this type of litigation may adversely affect our desire to proceed with, or our ability to complete, a particular transaction. Any litigation of this type could also have a material adverse effect on our financial condition or results of operations.

We are self-insured for a portion of our consolidated properties’ exposure to casualty losses resulting from fire, earthquake, hurricane, tornado, flood and other perils. We recognize casualty losses or gains based on the net book value of the affected property and any related insurance proceeds. In many instances, the actual cost to repair or replace the property may exceed its net book value and any insurance proceeds. We also insure certain unconsolidated properties for a portion of their exposure to such losses. In addition, we are self-insured for a portion of our exposure to third-party claims related to our employee health insurance plans, workers’ compensation coverage, and general liability exposure. With respect to our insurance obligations to unconsolidated properties and our exposure to claims of third parties, we establish reserves at levels that reflect our known and estimated losses. The ultimate cost of losses and the impact of unforeseen events may vary materially from recorded reserves, and variances may adversely affect our operating results and financial condition. We purchase insurance (or reinsurance where we insure unconsolidated properties) to reduce our exposure to catastrophe losses and limit our financial losses on large individual risks. The availability and cost of insurance are determined by market conditions outside our control. No assurance can be made that we will be able to obtain and maintain insurance at the same levels and on the same terms as we do today. If we are not able to obtain or maintain insurance in amounts we consider appropriate for our business, or if the cost of obtaining such insurance increases materially, we may have to retain a larger portion of the potential loss associated with our exposures to risks. The extent of our losses in connection with catastrophic events is a function of the severity of the event and the total amount of exposure in the affected area. When we have geographic concentration of exposures, a single catastrophe (such as an earthquake) or destructive weather trend affecting a region may have a significant impact on our financial

Our success depends upon the retention of our senior management, including Terry Considine, our chief executive officer and president. There are no assurances that we would be able to find qualified replacements for the individuals who make up our senior management if their services were no longer available. The loss of services of one or more members of our senior management team could have a material adverse effect on our business, financial condition and results of operations. We do not currently maintain key-man life insurance for any of our employees. The loss of any member of senior management could adversely affect our ability to pursue effectively our business strategy.

We own consolidated and unconsolidated equity interests in certain properties and manage for third parties and affiliates other properties that benefit from governmental programs intended to provide housing to people with low or moderate incomes. These programs, which are usually administered by HUD or state housing finance agencies, typically provide mortgage insurance, favorable financing terms, tax-credit equity, or rental assistance payments to the property owners. As a condition of the receipt of assistance under these programs, the properties must comply with various requirements, which typically limit rents to pre-approved amounts and impose restrictions on resident incomes. Failure to comply with these requirements and restrictions may result in financial penalties or loss of benefits. We usually need to obtain the approval of HUD in order to manage, or acquire a significant interest in, a HUD-assisted property. We may not always receive such approval.

Under the Americans with Disabilities Act of 1990, or ADA, all places intended to be used by the public are required to meet certain Federal requirements related to access and use by disabled persons. Likewise, the Fair Housing Amendments Act of 1988, or FHAA, requires apartment properties first occupied after March 13, 1990 to be accessible to the handicapped. These and other Federal, state and local laws may require modifications to our properties, or restrict renovations of the properties. Noncompliance with these laws could result in the imposition of fines or an award of damages to private litigants and also could result in an order to correct any non-complying feature, which could result in substantial capital expenditures. Although we believe that our properties are substantially in compliance with present requirements, we may incur unanticipated expenses to comply with the ADA and the FHAA.

Various Federal, state and local laws subject property owners or operators to liability for management, and the costs of removal or remediation, of certain hazardous substances present on a property. Such laws often impose liability without regard to whether the owner or operator knew of, or was responsible for, the release or presence of the hazardous substances. The presence of, or the failure to manage or remedy properly, hazardous substances may adversely affect occupancy at affected apartment communities and the ability to sell or finance affected properties. In addition to the costs associated with investigation and remediation actions brought by government agencies, and potential fines or penalties imposed by such agencies in connection therewith, the presence of hazardous substances on a property could result in claims by private plaintiffs for personal injury, disease, disability or other infirmities. Various laws also impose liability for the cost of removal, remediation or disposal of hazardous substances through a licensed disposal or treatment facility. Anyone who arranges for the disposal or treatment of hazardous substances is potentially liable under such laws. These laws often impose liability whether or not the person arranging for the

We have been named as a defendant in lawsuits that have alleged personal injury and property damage as a result of the presence of mold. In addition, we are aware of lawsuits against owners and managers of multifamily properties asserting claims of personal injury and property damage caused by the presence of mold, some of which have resulted in substantial monetary judgments or settlements. We have only limited insurance coverage for property damage loss claims arising from the presence of mold and for personal injury claims related to mold exposure. We have implemented policies, procedures, third-party audits and training, and include a detailed moisture intrusion and mold assessment during acquisition due diligence. We believe these measures will prevent or eliminate mold exposure from our properties and will minimize the effects that mold may have on our residents. To date, we have not incurred any material costs or liabilities relating to claims of mold exposure or to abate mold conditions. Because the law regarding mold is unsettled and subject to change we can make no assurance that liabilities resulting from the presence of or exposure to mold will not have a material adverse effect on our consolidated financial condition or results of operations.

From time to time, the Federal Bureau of Investigation, or FBI, and the United States Department of Homeland Security issue alerts regarding potential terrorist threats involving apartment buildings. Threats of future terrorist attacks, such as those announced by the FBI and the Department of Homeland Security, could have a negative effect on rent and occupancy levels at our properties. The effect that future terrorist activities or threats of such activities could have on our business is uncertain and unpredictable. If we incur a loss at a property as a result of an act of terrorism, we could lose all or a portion of the capital we have invested in the property, as well as the future revenue from the property.

If we fail to qualify as a REIT, we will not be allowed a deduction for dividends paid to our stockholders in computing our taxable income, and we will be subject to Federal income tax at regular corporate rates, including any applicable alternative minimum tax. This would substantially reduce our funds available for payment to our investors. Unless entitled to relief under certain provisions of the Code, we also would be disqualified from taxation as a REIT for the four taxable years following the year during which we ceased to qualify as a REIT. In addition, our failure to qualify as a REIT would trigger the following consequences:

We believe that we operate, and have always operated, in a manner that enables us to meet the requirements for qualification as a REIT for Federal income tax purposes. Our continued qualification as a REIT will depend on our satisfaction of certain asset, income, investment, organizational, distribution, stockholder ownership and other requirements on a continuing basis. Our ability to satisfy the asset tests depends upon our analysis of the fair market values of our assets, some of which are not susceptible to a precise determination, and for which we will not obtain independent appraisals. Our compliance with the REIT income and quarterly asset requirements also depends upon our ability to manage successfully the composition of our income and assets on an ongoing basis. Moreover, the proper classification of an instrument as debt or equity for Federal income tax purposes may be uncertain in some circumstances, which could affect the application of the REIT qualification requirements. Accordingly, there can be no assurance that the Internal Revenue Service, or the IRS, will not contend that our interests in subsidiaries or other issuers constitutes a violation of the REIT requirements. Moreover, future economic, market, legal, tax or other considerations may cause us to fail to qualify as a REIT, or our Board of Directors may determine to revoke our REIT status.

As a REIT, we are subject to annual distribution requirements, which limit the amount of cash we retain for other business purposes, including amounts to fund our growth. We generally must distribute annually at least 90% of our net REIT taxable income, excluding any net capital gain, in order for our distributed earnings not to be subject to corporate income tax. We intend to make distributions to our stockholders to comply with the requirements of the Code. However, differences in timing between the recognition of taxable income and the actual receipt of cash could require us to sell assets or borrow funds on a short-term or long-term basis to meet the 90% distribution requirement of the Code.

Our charter limits ownership of our Common Stock by any single stockholder (applying certain “beneficial ownership” rules under the Federal securities laws) to 8.7% of our outstanding shares of Common Stock, or 15% in the case of certain pension trusts, registered investment companies and Mr. Considine. Our charter also limits ownership of our Common Stock and preferred stock by any single stockholder to 8.7% of the value of the outstanding Common Stock and preferred stock, or 15% in the case of certain pension trusts, registered investment companies and Mr. Considine. The charter also prohibits anyone from buying shares of our capital stock if the purchase would result in us losing our REIT status. This could happen if a transaction results in fewer than 100 persons owning all of our shares of capital stock or results in five or fewer persons (applying certain attribution rules of the Code) owning 50% or more of the value of all of our shares of capital stock. If anyone acquires shares in excess of the ownership limit or in violation of the ownership requirements of the Code for REITs:

We may purchase the shares of capital stock held in trust at a price equal to the lesser of the price paid by the transferee of the shares or the then current market price. If the trust transfers any of the shares of capital stock, the affected person will receive the lesser of the price paid for the shares or the then current market price. An individual who acquires shares of capital stock that violate the above rules bears the risk that the individual:

The 8.7% ownership limit discussed above may have the effect of precluding acquisition of control of us by a third party without the consent of our Board of Directors. Our charter authorizes our Board of Directors to issue up to 510,587,500 shares of capital stock. As of December 31, 2006, 426,157,736 shares were classified as Common Stock, of which 96,820,252 were outstanding, and 84,429,764 shares were classified as preferred stock, of which 26,854,962 were outstanding. Under our charter, our Board of Directors has the authority to classify and reclassify

As a Maryland corporation, we are subject to various Maryland laws that may have the effect of discouraging offers to acquire us and increasing the difficulty of consummating any such offers, even if an acquisition would be in our stockholders’ best interests. The Maryland General Corporation Law restricts mergers and other business combination transactions between us and any person who acquires beneficial ownership of shares of our stock representing 10% or more of the voting power without our Board of Directors’ prior approval. Any such business combination transaction could not be completed until five years after the person acquired such voting power, and generally only with the approval of stockholders representing 80% of all votes entitled to be cast and 662/3% of the votes entitled to be cast, excluding the interested stockholder, or upon payment of a fair price. Maryland law also provides generally that a person who acquires shares of our capital stock that represent 10% or more of the voting power in electing directors will have no voting rights unless approved by a vote of two-thirds of the shares eligible to vote. Additionally, Maryland law provides, among other things, that the board of directors has broad discretion in adopting stockholders’ rights plans and has the sole power to fix the record date, time and place for special meetings of the stockholders. In addition, Maryland law provides that corporations that:

To date, we have not made any of the elections described above.

None.

Our properties are located in 46 states, the District of Columbia and Puerto Rico. As of December 31, 2006, our conventional properties are operated through 17 regional operating centers. Affordable property operations are managed through Aimco Capital and are operated through three regional operating centers. The following table sets forth information on all of our property operations as of December 31, 2006 and 2005:

At December 31, 2006, we owned an equity interest in and consolidated 703 properties containing 162,432 apartment units, which we refer to as “consolidated.” These consolidated properties contain, on average, 231 apartment units, with the largest property containing 2,877 apartment units. These properties offer residents a range of amenities, including swimming pools, clubhouses, spas, fitness centers, tennis courts and saunas. Many of the apartment units offer features such as vaulted ceilings, fireplaces, washer and dryerhook-ups,cable television, balconies and patios. Additional information on our consolidated properties is contained in “Schedule III, Real Estate and Accumulated Depreciation” in this Annual Report. At December 31, 2006, we held an equity interest in and did not consolidate 102 properties containing 11,791 apartment units, which we refer to as “unconsolidated.” In addition, we provided property management services for third parties owning 41 properties containing 3,573 apartment units, and asset management services for third parties owning 410 properties containing 38,617 apartment units, although in certain cases we may indirectly own generally less than one percent of the operations of such properties through a partnership syndication or other fund.

Substantially all of our consolidated properties are encumbered by mortgage indebtedness. At December 31, 2006, our consolidated properties were encumbered by aggregate mortgage indebtedness totaling $6,265.1 million having an aggregate weighted average interest rate of 6.12%. Such mortgage indebtedness was secured by 680 properties with a combined net book value of $8,936.3 million. Included in the 680 properties, we had a total of 60 mortgage loans, with an aggregate principal balance outstanding of $693.5 million, that were each secured by property and cross-collateralized with certain (but not all) other mortgage loans within this group of 60 mortgage loans. See Note 6 of the consolidated financial statements in Item 8 for additional information about our indebtedness.

See the information under the caption “Legal Matters” in Note 8 of the consolidated financial statements in Item 8 for information regarding legal proceedings, which information is incorporated by reference in this Item 3.

No matters were submitted to a vote of security holders during the fourth quarter of 2006.

Our Common Stock has been listed and traded on the NYSE under the symbol “AIV” since July 22, 1994. The following table sets forth the quarterly high and low sales prices of our Common Stock, as reported on the NYSE, and the dividends declared in the periods indicated:

On February 23, 2007, the closing price of our Common Stock was $60.53 per share, as reported on the NYSE, and there were 97,577,459 shares of Common Stock outstanding, held by 3,459 stockholders of record. The number of holders does not include individuals or entities who beneficially own shares but whose shares are held of record by a broker or clearing agency, but does include each such broker or clearing agency as one recordholder.

As a REIT, we are required to distribute annually to holders of common stock at least 90% of our “real estate investment trust taxable income,” which, as defined by the Code and United States Department of Treasury regulations, is generally equivalent to net taxable ordinary income. We measure our economic profitability and intend to pay regular dividends to our stockholders based on Funds From Operations, less Capital Replacements during the relevant period. Future payment of dividends are at the discretion of our Board of Directors and will depend on numerous factors including our financial condition, capital requirements, the annual distribution requirements under the provisions of the Code applicable to REITs and such other factors as our Board of Directors deems relevant.

From time to time, we issue shares of Common Stock in exchange for common and preferred OP Units tendered to the Aimco Operating Partnership for redemption in accordance with the terms and provisions of the agreement of limited partnership of the Aimco Operating Partnership. Such shares are issued based on an exchange ratio of one share for each common OP Unit or the applicable conversion ratio for preferred OP Units. The shares are generally issued in exchange for OP Units in private transactions exempt from registration under the Securities Act of 1933, as amended, pursuant to Section 4(2) thereof. During the three and twelve months ended December 31, 2006, approximately 36,000 and 99,000 shares of Common Stock were issued in exchange for common OP Units.

The following table summarizes repurchases of our equity securities in the quarter ended December 31, 2006 (1):

Dividend Payments.  Our Credit Agreement includes customary covenants, including a restriction on dividends and other restricted payments, but permits dividends during any four consecutive fiscal quarters in an aggregate amount of up to 95% of our Funds From Operations for such period or such amount as may be necessary to maintain our REIT status.

The following graph compares cumulative total returns for our Common Stock, the Standard & Poor’s 500 Total Return Index (the “S&P 500”), the NASDAQ Composite, the SNL Residential REIT Index and the MSCI US REIT Index. The SNL Residential REIT Index was prepared by SNL Securities, an independent research and publishing firm specializing in the collection and dissemination of data on the banking, thrift and financial services industries. The MSCI US REIT Index is published by Morgan Stanley Capital International Inc., a provider of equity indices. The indices are weighted for all companies that fit the definitional criteria of the particular index and are calculated to exclude companies as they are acquired and add them to the index calculation as they become publicly traded companies. All companies of the definitional criteria in existence at the point in time presented are included in the index calculations. The graph assumes the investment of $100 in our Common Stock and in each index on December 31, 2001, and that all dividends paid have been reinvested.

The Performance Graph will not be deemed to be incorporated by reference into any filing by the Company under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that the Company specifically incorporates the same by reference.

The following selected financial data is based on our audited historical financial statements. This information should be read in conjunction with such financial statements, including the notes thereto, and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included herein or in previous filings with the Securities and Exchange Commission.

We are a self-administered and self-managed real estate investment trust, or REIT, engaged in the ownership, acquisition, management and redevelopment of apartment properties. Our property operations are characterized by diversification of product, location and price point. As of December 31, 2006, we owned or managed 1,256 apartment properties containing 216,413 units located in 46 states, the District of Columbia and Puerto Rico. Our primary sources of income and cash are rents associated with apartment leases.

The key financial indicators that we use in managing our business and in evaluating our financial condition and operating performance are: Funds From Operations, or FFO; FFO less spending for Capital Replacements, or AFFO; net asset value; same store property operating results; net operating income; net operating income less spending for Capital Replacements, or Free Cash Flow; financial coverage ratios; and leverage as shown on our balance sheet. These terms are defined and described in the sections captioned “Funds From Operations” and “Capital Expenditures” below. The key macro-economic factors and non-financial indicators that affect our financial condition and operating performance are: rates of job growth; single-family and multifamily housing starts; and interest rates.

Because our operating results depend primarily on income from our properties, the supply and demand for apartments influences our operating results. Additionally, the level of expenses required to operate and maintain our properties, the pace and price at which we redevelop, acquire and dispose of our apartment properties, and the volume and timing of fee transactions affect our operating results. Our cost of capital is affected by the conditions in the capital and credit markets and the terms that we negotiate for our equity and debt financings.

Our focus in 2006 has been to increase revenue and implement cost management and productivity initiatives, which includes centralizing purchasing, restructuring business processes, using technology to increase efficiency and implementing structured monthly reporting to identify issues and improve effectiveness of spending. We believe that our efforts are having their intended effect, and have resulted in positive operating results and built the foundation for improved long-term operating results. These initiatives and others have also resulted in improved asset quality, and we will continue to seek opportunities to reinvest in our properties through capital expenditures and to manage our portfolio through property sales and acquisitions.

For 2007, our focus will continue to include the following: enhance operations to improve and sustain customer satisfaction; obtain rate and occupancy increases to bring improved profitability; upgrade the quality of our portfolio through portfolio management, capital replacement, capital improvement and redevelopment; increase efficiency through improved business processes and automation; improve balance sheet flexibility; expand the use of tax credit equity to finance redevelopment of affordable properties; minimize our cost of capital; and monetize a portion of the value inherent in our properties with increased entitlements.

The following discussion and analysis of the results of our operations and financial condition should be read in conjunction with the financial statements.

We reported net income of $176.8 million and net income attributable to common stockholders of $95.7 million for the year ended December 31, 2006, compared to net income of $71.0 million and net loss attributable to common stockholders of $17.0 million for the year ended December 31, 2005, increases of $105.8 million and $112.7 million, respectively. These increases were principally due to the following items, all of which are discussed in further detail within this section:

These increases were partially offset by:

Our reported operating results for 2006 were affected significantly by our adoption of EITF04-5, as discussed in Adoption of EITF04-5 in Note 2 to the consolidated financial statements in Item 8. In accordance with the requirements of EITF04-5, we consolidated 156 previously unconsolidated entities as of January 1, 2006. The consolidation of these entities contributed to increases in the reported amounts of certain revenue and expenses.

We reported net income of $71.0 million and net loss attributable to common stockholders of $17.0 million for the year ended December 31, 2005, compared to net income of $263.5 million and net income attributable to common stockholders of $174.7 million for the year ended December 31, 2004, decreases of $192.5 million and $191.7 million, respectively. These decreases were principally due to the following items, all of which are discussed in further detail within this section:

These decreases were partially offset by an increase in net operating income associated with property operations, which included increases related to acquisition, newly consolidated and same store properties.

The following paragraphs discuss these and other items affecting the results of our operations in more detail.

Our operating income is generated primarily from the operations of our consolidated apartment properties. The following table summarizes the overall performance of our properties for the years ended December 31, 2006, 2005 and 2004 (in thousands):

For the year ended December 31, 2006, compared to the year ended December 31, 2005, net operating income for our consolidated property operations increased by $159.3 million, or 22.3%. The majority of this increase is attributable to newly consolidated properties (143 properties first consolidated in 2006 and 15 properties first consolidated in 2005), which contributed net operating income of $89.2 million in 2006. Newly consolidated properties are properties that: (i) were consolidated for all or part of the current year, (ii) were unconsolidated and

For the year ended December 31, 2005, compared to the year ended December 31, 2004, net operating income for our consolidated property operations increased by $68.7 million, or 10.7%. This increase was principally due to a $40.3 million increase in consolidated same store net operating income (see “Conventional Same Store Property Operating Results” below); a $21.3 million increase related to operations of acquisition properties, which were principally comprised of Palazzo East at Park La Brea and five other properties purchased in 2005 and The Palazzo at Park La Brea and 10 other properties purchased in 2004; a $10.6 million increase related to operations of newly consolidated properties (15 properties first consolidated in 2005 and 36 properties first consolidated in 2004); a $3.9 million increase related to operations of our affordable properties; and a $2.7 million increase related to the completion of certain redevelopment properties. These increases were offset by $6.4 million of increased property management expenses and $3.3 million of higher net casualty losses in 2005 as compared to 2004, primarily relating to greater hurricane and tropical storm damage that occurred in 2005.

Same store operating results is a key indicator we use to assess the performance of our property operations and to understand the period over period operations of a consistent portfolio of properties. We define “consolidated same store” properties as conventional properties (i) that we manage, (ii) in which our ownership interest exceeds 10%, (iii) the operations of which have been stabilized for all periods presented, and (iv) that have not been classified as held for sale. The following tables summarize the operations of our consolidated conventional rental property operations:

For the year ended December 31, 2006, compared to the year ended December 31, 2005, consolidated same store net operating income increased $44.6 million, or 7.8%. Revenues increased $67.6 million, or 6.7%, primarily due to higher occupancy (up 2.0%), higher average rent (up $29 per unit) and a $7.5 million increase in utility reimbursements. Expenses increased by $23.1 million, or 5.3%, primarily due to a $6.5 million increase in real

For the year ended December 31, 2005, compared to the year ended December 31, 2004, consolidated same store net operating income increased $40.3 million, or 7.7%. Revenues increased $63.1 million, or 6.8%, primarily due to higher occupancy (up 2.3%), higher average rent (up $29 per unit), and a $9.4 million decrease in bad debt expense. Expenses increased by $22.8 million, or 5.6%, primarily due to a $7.7 million increase in real estate taxes, a $6.6 million increase in employee compensation and related expenses, and a $6.0 million increase in utilities.

We earn income from property management primarily from certain unconsolidated real estate partnerships for which we are the general partner. The income is primarily in the form of fees generated through property management and other associated activities. Reported revenue from property management decreases as we consolidate real estate partnerships because it is eliminated in consolidation. We expect this trend to continue as we increase our ownership in more of these partnerships or otherwise determine that consolidation is required by GAAP. Additionally, our revenue decreases as properties within our unconsolidated real estate partnerships are sold. Offsetting the revenue earned in property management are the direct expenses associated with property management.

The following table summarizes the overall performance of our property management business for the years ended December 31, 2006, 2005 and 2004 (in thousands):

For the year ended December 31, 2006, compared to the year ended December 31, 2005, net operating income from property management decreased by $9.8 million, or 56.9%. For the year ended December 31, 2005, compared to the year ended December 31, 2004, net operating income from property management decreased by $5.5 million, or 24.3%. In both comparisons the decreases were principally due to reductions in the numbers of unaffiliated and unconsolidated real estate partnerships that we managed. Most of these decreases resulted from the consolidation of partnerships due to increased ownership and GAAP requirements (including the adoption of EITF04-5 in 2006 as discussed in Adoption of EITF04-5 in Note 2 to the consolidated financial statements in Item 8), which required

Activity fees are generated from transactions, including dispositions, refinancings, sales promotes and tax credit syndications and redevelopments. These transactions occur on varying timetables, thus the income varies from period to period. The majority of these fees are realized in connection with transactions related to affordable properties within the Aimco Capital portfolio. We have a large number of affiliated real estate partnerships for which we have identified a pipeline of transactional opportunities. As a result, we view activity fees as a predictable part of our core business strategy. Asset management revenue is from the financial management of partnerships, rather than management ofday-to-dayproperty operations. Asset management revenue includes certain fees that were earned in a prior period, but not recognized at that time because collectibility was not reasonably assured. Those fees may be recognized in a subsequent period upon occurrence of a transaction or improvement in operations that generates sufficient cash to pay the fees. Activity and asset management expenses are the direct expenses associated with transactional activities and asset management. These activities are conducted primarily by our taxable subsidiaries and the related operating income is generally subject to income taxes. As discussed in Tax Credit Arrangements in Note 2 to the consolidated financial statements in Item 8, in 2006 we revised our treatment of income from certain tax credit arrangements.

The following table summarizes the operating results of our transactional and asset management activities for the years ended December 31, 2006, 2005 and 2004, excluding related income tax effects (in thousands):

Included in the activity fees and asset management revenues, primarily from affiliates for the years ended December 31, 2006, 2005 and 2004, were $41.4 million, $33.3 million and $30.3 million, respectively, of fees related to affordable properties within the Aimco Capital portfolio.

For the year ended December 31, 2006, compared to the year ended December 31, 2005, net operating income from activity fees and asset management increased $12.5 million, or 46.6%. This increase is primarily attributable to growth in our affordable housing tax credit syndication business, including a $4.3 million increase in syndication fees and a $4.6 million increase in other revenue earned in connection with these arrangements. The increase also reflects a $2.4 million increase in promote distributions from partnerships.

For the year ended December 31, 2005, compared to the year ended December 31, 2004, net operating income from activity fees and asset management increased by $3.7 million, or 16.2%. This overall increase was principally a result of increased activity fees related to syndication and developer activities of $6.0 million and $3.7 million, respectively, as well as a $1.3 million decrease in expenses associated with these activities. Additionally, we received $3.1 million in promote distributions from an unconsolidated partnership, as a result of us, as general partner, achieving financial returns to the limited partners in excess of established targets. These increases were offset by a $5.2 million decrease in asset management fees and decreases of $3.3 million and $1.9 million in activity fees related to disposition and refinancing activities, respectively.

For the year ended December 31, 2006, compared to the year ended December 31, 2005, depreciation and amortization increased $94.4 million, or 25.1%. This increase was principally due to $39.7 million of depreciation for newly consolidated properties, particularly properties that were consolidated in 2006 in connection with the adoption of EITF04-5 (seeAdoption of EITF04-5 in Note 2 to the consolidated financial statements in Item 8) and $46.2 million of depreciation related to assets recently placed in service, including acquired properties, redevelopment projects and other capital expenditures. Additionally, a $4.8 million increase resulted from a change

For the year ended December 31, 2005, compared to the year ended December 31, 2004, depreciation and amortization increased $60.8 million, or 19.3%. This increase was principally due to $31.9 million of additional depreciation on certain real estate assets where the depreciation was adjusted prospectively (see Impairment of Long-Lived Assetsin Note 2 of the consolidated financial statements in Item 8); $13.8 million and $8.3 million of additional depreciation related to newly consolidated and acquisition properties, respectively; and $11.0 million from the completion of certain redevelopment projects. Additionally, $4.3 million of the increase was due to a change in estimated useful lives that apply to capitalized payroll and certain indirect costs (see Capital Expenditures and Related Depreciation in Note 2 of the consolidated financial statements in Item 8).

For the year ended December 31, 2006, compared to the year ended December 31, 2005, general and administrative expenses increased $8.9 million, or 9.6%. This increase reflects a $9.6 million increase in employee compensation and related costs, including higher stock-based compensation and variable compensation based on achievement of established performance targets. The increase was partially offset by a $3.9 million decrease in legal, audit and consulting expenses. In addition, in 2006 we recorded a $2.9 million adjustment based on an alternative method and revised assumptions for the valuation of High Performance Units (seeHigh Performance Units in Note 10 to the consolidated financial statements in Item 8).

For the year ended December 31, 2005, compared to the year ended December 31, 2004, general and administrative expenses increased $15.4 million, or 19.9%. This increase was principally due to $14.1 million in higher compensation related to increased staffing levels, increased health care costs, and transition costs associated with the chief financial and chief accounting officer positions. Additionally, in 2005 we accrued $0.6 million in severance costs related to the restructuring of regional operating centers as a result of property dispositions.

Other expenses (income), net includes income tax provision/benefit, franchise taxes, risk management activities related to our unconsolidated partnerships, partnership administration expenses and various other items.

For the year ended December 31, 2006, compared to the year ended December 31, 2005, other expenses (income), net increased by $0.9 million, or 11.6%. This increase was primarily attributable to a $4.9 million decrease in the income tax benefit for our continuing operations, reflecting smaller losses of our taxable REIT subsidiaries (see Note 9 to the consolidated financial statements in Item 8). The decrease was partially offset by net favorable legal settlements and adjustments to accruals for loss contingencies.

For the year ended December 31, 2005, compared to the year ended December 31, 2004, other expenses (income), net decreased by $4.4 million, or 35.6%. This decrease was principally due to a $9.5 million higher income tax benefit for our continuing operations, reflecting increased losses of our taxable REIT subsidiaries (see Note 9 to the consolidated financial statements in Item 8). The decrease in other expenses was partially offset by a $3.8 million increase in partnership expenses, which was largely the result of higher professional fees, and other expenses increases and reclassifications.

Interest income consists primarily of interest on notes receivable from non-affiliates and unconsolidated real estate partnerships, interest on cash and restricted cash accounts, and accretion of discounts on certain notes receivable from unconsolidated real estate partnerships. Transactions that result in accretion occur infrequently and thus accretion income may vary from period to period.

For the year ended December 31, 2006, as compared to the year ended December 31, 2005, interest income increased $1.3 million, or 4.2%. This increase reflects $8.0 million in interest income on cash and restricted cash balances of newly consolidated properties, particularly properties consolidated as a result of adopting EITF04-5 in 2006 (see Adoption of EITF04-5 in Note 2 the consolidated financial statements in Item 8). The increase also

For the year ended December 31, 2005, as compared to the year ended December 31, 2004, interest income decreased $1.1 million, or 3.4%. This decrease was principally the result of a $3.8 million reduction in accretion income, partially offset by higher interest income from money market and interest-bearing accounts due to increased interest rates and higher cash balances.

For the year ended December 31, 2006, compared to the year ended December 31, 2005, interest expense, which includes the amortization of deferred financing costs, increased $64.7 million, or 18.9%. This increase reflects $35.4 million in interest expense of newly consolidated properties, particularly those consolidated as a result of adopting EITF04-5 in 2006 (see Adoption of EITF04-5 in Note 2 the consolidated financial statements in Item 8). Additionally, interest expense on property debt increased by $33.9 million due to higher interest rates on variable rate loans, higher average balances related to refinancings and acquisitions. These increases were partially offset by a $6.9 million increase in capitalized interest, reflecting an increase in properties undergoing redevelopment and construction.

For the year ended December 31, 2005, compared to the year ended December 31, 2004, interest expense increased $25.3 million, or 8.0%. This increase was principally due to interest on the additional debt related to acquisition and newly consolidated properties $16.0 million and $5.0 million, respectively, and a $17.7 million increase due to higher borrowings and interest rates on variable rate debt. These increases were partially offset by $4.8 million in lower amortization of loan costs, primarily due to corporate debt restructuring in 2005, $8.6 million in higher capitalized interest due to increased redevelopment activity, and a $2.1 million decrease related to the redemption of mandatorily redeemable preferred securities in 2004 and early 2005.

When real estate partnerships consolidated in our financial statements make cash distributions to partners in excess of the carrying amount of the minority interest, we record a charge equal to the excess amount, even though there is no economic effect or cost.

For the year ended December 31, 2006, as compared to the year ended December 31, 2005, deficit distributions to minority partners increased $9.4 million, or 80.8%. This increase reflects higher levels of distributions to minority interests in 2006, including several large distributions in connection with debt refinancing transactions.

For the year ended December 31, 2005, as compared to the year ended December 31, 2004, deficit distributions to minority partners decreased $5.8 million, or 33.1%. This decrease was due to reduced levels of distributions being made by our consolidated real estate partnerships as a result of lower refinancing activity, decreased operating results, and our increased ownership of certain partnerships.

Gain on dispositions of unconsolidated real estate and other includes our share of gains related to dispositions of real estate by unconsolidated real estate partnerships, gains on dispositions of investments in unconsolidated real estate partnerships, gains on dispositions of land and other non-depreciable assets, and costs related to asset disposal activities. The amounts of reported gains reflect the changing level of our disposition activity and may vary from period to period. Losses incurred in connection with these transactions are reported separately as impairments.

For the year ended December 31, 2006, as compared to the year ended December 31, 2005, gain on dispositions of unconsolidated real estate and other increased $15.6 million. This increase is primarily attributable to an $11.0 million gain on the disposition of our interest in an unconsolidated joint venture that owned and operated several student housing properties and a $9.0 million increase in gains on disposition of land and other non-

For the year ended December 31, 2005, as compared to the year ended December 31, 2004, gain on dispositions of unconsolidated real estate and other decreased $50.3 million. This decrease reflects a $34.6 million gain on the sale of a parcel of land located in Florida and $17.4 million representing our share of a gain from the sale of an unconsolidated core property, both of which occurred in 2004.

Minority interest in consolidated real estate partnerships reflects minority partners’ share of operating results of consolidated real estate partnerships. This generally includes the minority partners’ share of property management fees, interest on notes and other amounts eliminated in consolidation that we charge to such partnerships. However, we generally do not recognize a benefit for the minority interest share of partnership losses for partnerships that have deficits in partners’ equity.

For the year ended December 31, 2006, as compared to the year ended December 31, 2005, minority interest in consolidated real estate partnerships changed unfavorably by $24.7 million. This change is primarily attributable to our recognition of $25.0 million for minority partners’ share of losses of partnerships with deficits in equity as a result of adopting EITF04-5 in 2006 (see Adoption of EITF04-5 in Note 2 to the consolidated financial statements in Item 8). The change also reflects differences related to our revised accounting treatment for tax credit arrangements (see Tax Credit Arrangements in Note 2 to the consolidated financial statements in Item 8), including (i) the reversal in 2006 of a previously recognized benefit of $9.0 million for losses of tax credit partnerships that were allocated to minority interests in prior years, but which are absorbed by us under our revised accounting treatment and (ii) a $6.7 million benefit recognized in 2005 for losses allocated to minority interests in tax credit partnerships, while no comparable amount was recognized in 2006 under our revised accounting treatment. These unfavorable changes were partially offset by a $16.0 million net increase in the minority interest share of other real estate partnership losses.

For the year ended December 31, 2005, as compared to the year ended December 31, 2004, the benefit from minority interest in consolidated real estate partnerships decreased $9.6 million. This decrease was driven by general improvement in property operating results during 2005 as compared to 2004, which resulted in minority interests absorbing a lower amount of partnership losses.

For properties accounted for as held for sale, the results of operations for properties sold during the period or designated as held for sale at the end of the period are generally required to be classified as discontinued operations for all periods presented. The components of net earnings that are classified as discontinued operations include all property-related revenues and operating expenses, depreciation expense recognized prior to the classification as held for sale, property-specific interest expense to the extent there is secured debt on the property, and any related minority interest. In addition, any impairment losses on assets held for sale, and the net gain on the eventual disposal of properties held for sale are reported in discontinued operations.

For the years ended December 31, 2006, 2005, and 2004, income from discontinued operations, net totaled $219.5 million, $94.1 million and $209.7 million, respectively, which includes losses from operations of $0.8 million and $4.5 million in 2006 and 2005, respectively, and income from operations of $5.4 million in 2004. For 2006, the income from operations included the operating results of 77 properties and one tower of the Flamingo South Beach property (the South Tower) that were sold during 2006. For 2005 and 2004, the income from operations included the operating results of 160 properties and 214 properties, respectively, that were sold or classified as held for sale in 2004, 2005 and 2006. Due to varying number of properties and the timing of sales, the income from operations is not comparable year to year.

During 2006, we sold 77 properties and the South Tower, resulting in a net gain on sale of approximately $227.3 million (which is net of $32.9 million of related income taxes). Additionally, we recognized $0.4 million in impairment recoveries on assets sold in 2006 and $15.9 million of net recoveries of deficit distributions to minority

Changes in the level of gains recognized from period to period reflect the changing level of our disposition activity from period to period. Additionally, gains on properties sold are determined on an individual property basis or in the aggregate for a group of properties that are sold in a single transaction, and are not comparable period to period. See Note 13 of the consolidated financial statements in Item 8 for additional information on discontinued operations.

On March 31, 2004, we recorded a $4.0 million cumulative effect of change in accounting principle related to the adoption of FIN 46. This charge is attributable to our recognition of cumulative losses allocable to minority interest that would otherwise have resulted in minority interest deficits. See Note 2 of the consolidated financial statements in Item 8 for further information.

We prepare our consolidated financial statements in accordance with GAAP, which requires us to make estimates and assumptions. We believe that the following critical accounting policies involve our more significant judgments and estimates used in the preparation of our consolidated financial statements.

Real estate and other long-lived assets to be held and used are stated at cost, less accumulated depreciation and amortization, unless the carrying amount of the asset is not recoverable. If events or circumstances indicate that the carrying amount of a property may not be recoverable, we make an assessment of its recoverability by comparing the carrying amount to our estimate of the undiscounted future cash flows, excluding interest charges, of the property. If the carrying amount exceeds the aggregate undiscounted future cash flows, we recognize an impairment loss to the extent the carrying amount exceeds the estimated fair value of the property.

Real estate investments are subject to varying degrees of risk. Several factors may adversely affect the economic performance and value of our real estate investments. These factors include:

Any adverse changes in these and other factors could cause an impairment in our long-lived assets, including real estate and investments in unconsolidated real estate partnerships. Based on periodic tests of recoverability of long-lived assets, for the year ended December 31, 2005, we recorded impairment losses of $3.4 million related to

Notes receivable from unconsolidated real estate partnerships consist primarily of notes receivable from partnerships in which we are the general partner. The ultimate repayment of these notes is subject to a number of variables, including the performance and value of the underlying real estate property and the claims of unaffiliated mortgage lenders. Our notes receivable include loans extended by us that we carry at the face amount plus accrued interest, which we refer to as “par value notes,” and loans extended by predecessors whose positions we generally acquired at a discount, which we refer to as “discounted notes.”

We record interest income on par value notes as earned in accordance with the terms of the related loan agreements. We discontinue the accrual of interest on such notes when the notes are impaired, as discussed below, or when there is otherwise significant uncertainty as to the collection of interest. We record income on such nonaccrual loans using the cost recovery method, under which we apply cash receipts first to the recorded amount of the loan; thereafter, any additional receipts are recognized as income.

We recognize interest income on discounted notes receivable based upon whether the amount and timing of collections are both probable and reasonably estimable. We consider collections to be probable and reasonably estimable when the borrower has entered into certain closed or pending transactions (which include real estate sales, refinancings, foreclosures and rights offerings) that provide a reliable source of repayment. In such instances, we recognize accretion income, on a prospective basis using the effective interest method over the estimated remaining term of the loans, equal to the difference between the carrying amount of the discounted notes and the estimated collectible value. We record income on all other discounted notes using the cost recovery method. Accretion income recognized in any given period is based on our ability to complete transactions to monetize the notes receivable and the difference between the carrying value and the estimated collectible value of the notes; therefore, accretion income varies on a period by period basis and could be lower or higher than in prior periods.

We assess the collectibility of notes receivable on a periodic basis, which assessment consists primarily of an evaluation of cash flow projections of the borrower to determine whether estimated cash flows are sufficient to repay principal and interest in accordance with the contractual terms of the note. We recognize impairments on notes receivable when it is probable that principal and interest will not be received in accordance with the contractual terms of the loan. The amount of the impairment to be recognized generally is based on the fair value of the partnership’s real estate that represents the primary source of loan repayment. In certain instances where other sources of cash flow are available to repay the loan, the impairment is measured by discounting the estimated cash flows at the loan’s original effective interest rate.

During the year ended December 31, 2006, we identified and recorded an impairment loss on notes receivable of $2.8 million. For the years ended December 31, 2005 and 2004, we recorded net recoveries of $1.4 million and $1.8 million of previously recorded impairment losses on notes receivable, respectively. We will continue to evaluate the collectibility of these notes, and we will adjust related allowances in the future due to changes in market conditions and other factors.

We capitalize costs, including certain indirect costs, incurred in connection with our capital expenditure activities, including redevelopment and construction projects, other tangible property improvements, and replacements of existing property components. Included in these capitalized costs are payroll costs associated with time spent by site employees in connection with the planning, execution and control of all capital expenditure activities at the property level. We characterize as “indirect costs” an allocation of certain department costs, including payroll, at the regional operating center and corporate levels that clearly relate to capital expenditure activities. We capitalize interest, property taxes and insurance during periods in which redevelopment and construction projects

For the years ended December 31, 2006, 2005 and 2004, for continuing and discontinued operations, we capitalized $24.7 million, $18.1 million and $9.5 million, respectively, of interest costs and $66.2 million, $53.3 million and $46.7 million, respectively of site payroll and indirect costs.

Funds From Operations, or FFO, is a non-GAAP financial measure that we believe, when considered with the financial statements determined in accordance with GAAP, is helpful to investors in understanding our performance because it captures features particular to real estate performance by recognizing that real estate generally appreciates over time or maintains residual value to a much greater extent than do other depreciable assets such as machinery, computers or other personal property. The Board of Governors of the National Association of Real Estate Investment Trusts, or NAREIT, defines FFO as net income (loss), computed in accordance with GAAP, excluding gains from sales of depreciable property, plus depreciation and amortization, and after adjustments for unconsolidated partnerships and joint ventures. Adjustments for unconsolidated partnerships and joint ventures are calculated to reflect FFO on the same basis. We compute FFO for all periods presented in accordance with the guidance set forth by NAREIT’s April 1, 2002, White Paper, which we refer to as the White Paper. We calculate FFO (diluted) by subtracting redemption related preferred stock issuance costs and dividends on preferred stock and adding back dividends/distributions on dilutive preferred securities and interest expense on dilutive mandatorily redeemable convertible preferred securities. FFO should not be considered an alternative to net income or net cash flows from operating activities, as determined in accordance with GAAP, as an indication of our performance or as a measure of liquidity. FFO is not necessarily indicative of cash available to fund future cash needs. In addition, although FFO is a measure used for comparability in assessing the performance of real estate investment trusts, there can be no assurance that our basis for computing FFO is comparable with that of other real estate investment trusts.

For the years ended December 31, 2006, 2005 and 2004, our FFO is calculated as follows (in thousands):

Liquidity is the ability to meet present and future financial obligations either through the sale or maturity of existing assets or by the acquisition of additional funds through working capital management. Both the coordination of asset and liability maturities and effective working capital management are important to the maintenance of liquidity. Our primary source of liquidity is cash flow from our operations. Additional sources are proceeds from property sales and proceeds from refinancings of existing mortgage loans and borrowings under new mortgage loans.

Our principal uses for liquidity include normal operating activities, payments of principal and interest on outstanding debt, capital expenditures, dividends paid to stockholders and distributions paid to partners, and acquisitions of, and investments in, properties. We use our cash and cash equivalents and our cash provided by operating activities to meet short-term liquidity needs. In the event that our cash and cash equivalents and our cash provided by operating activities is not sufficient to cover our short-term liquidity demands, we have additional means, such as short-term borrowing availability and proceeds from property sales and refinancings, to help us meet our short-term liquidity demands. We use our revolving credit facility for general corporate purposes and to fund investments on an interim basis. We expect to meet our long-term liquidity requirements, such as debt maturities and property acquisitions, through long-term borrowings, both secured and unsecured, the issuance of debt or equity securities (including OP Units), the sale of properties and cash generated from operations.

At December 31, 2006, we had $229.8 million in cash and cash equivalents, an increase of $68.1 million from December 31, 2005. This increase reflects cash balances of newly consolidated properties and proceeds from sales and refinancing transactions that had not been distributed or applied to the outstanding balance of the revolving credit facility (see Note 8 to the consolidated financial statements in Item 8). At December 31, 2006, we had $347.5 million of restricted cash, primarily consisting of reserves and escrows held by lenders for bond sinking funds, capital expenditures, property taxes and insurance. In addition, cash, cash equivalents and restricted cash are held by partnerships that are not presented on a consolidated basis. The following discussion relates to changes in

For the year ended December 31, 2006, our net cash provided by operating activities of $532.3 million was primarily from operating income from our consolidated properties, which is affected primarily by rental rates, occupancy levels and operating expenses related to our portfolio of properties. Cash provided by operating activities increased $176.7 million compared with the year ended December 31, 2005, driven by an increase in net income and changes in operating assets and liabilities. The changes in operating assets and liabilities were primarily due to a decrease in restricted cash, net of an increase in restricted cash from newly consolidated properties, and an increase in deferred revenues.

For the year ended December 31, 2006, our net cash provided by investing activities of $233.0 million primarily resulted from proceeds received from the sales of properties, partially offset by originations of notes receivable relating to the West Harlem transaction, investments in our existing real estate assets through capital spending as well as the acquisition of nine properties (see Note 3 to the consolidated financial statements in Item 8 for further information on acquisitions).

Although we hold all of our properties for investment, we sell properties when they do not meet our investment criteria or are located in areas that we believe do not justify our continued investment when compared to alternative uses for our capital. During the year ended December 31, 2006, we sold 77 consolidated properties and the South Tower of the Flamingo South Beach property. These properties and the South Tower were sold for an aggregate sales price of $1,110.7 million and generated proceeds totaling $958.6 million, after the payment of transaction costs and the assumption of debt. Sales proceeds were used to repay a portion of our outstanding short-term indebtedness and for other corporate purposes.

We are currently marketing for sale certain properties that are inconsistent with our long-term investment strategy. Additionally, from time to time, we may market certain properties that are consistent with our long-term investment strategy but offer attractive returns, such as sales to buyers who intend to convert the properties to condominiums. Gross sales proceeds from 2007 dispositions are expected to be $400 million to $600 million, and we plan to use our share of the net proceeds from such dispositions to reduce debt, fund capital expenditures on existing assets, fund property and partnership acquisitions, potentially repurchase Common Stock and for other operating needs and corporate purposes.

We classify all capital spending as Capital Replacements (which we refer to as CR), Capital Improvements (which we refer to as CI), casualties or redevelopment. Non-redevelopment and non-casualty capitalizable expenditures are apportioned between CR and CI based on the useful life of the capital item under consideration and the period we have owned the property (i.e., the portion that was consumed during our ownership of the item represents CR; the portion of the item that was consumed prior to our ownership represents CI).

For the year ended December 31, 2006, we spent a total of $76.6 million on CR. These are expenditures that represent the share of expenditures that are deemed to replace the consumed portion of acquired capital assets. For the year ended December 31, 2006, we spent a total of $99.2 million, $35.8 million and $230.8 million, respectively, on CI, casualties and redevelopment. CI expenditures represent all non-redevelopment and non-casualty capital expenditures that are made to enhance the value, profitability or useful life of an asset from its original purchase condition. Casualty expenditures represent capitalized costs incurred in connection with casualty losses and are associated with the restoration of the asset. A portion of the restoration costs may be reimbursed by insurance carriers subject to deductibles associated with each loss. Redevelopment expenditures represent expenditures that substantially upgrade the property.

The table below details our share of actual spending, on both consolidated and unconsolidated real estate partnerships, for CR, CI, casualties and redevelopment for the year ended December 31, 2006 on a per unit and total dollar basis (based on approximately 143,054 ownership equivalent units (excluding non-managed units) weighted for the portion of the period that we owned the property), and reconciles it to our consolidated statement of cash flows for the same period (in thousands, except per unit amounts).

Included in the above spending for CI, casualties and redevelopment, was approximately $54.8 million of our share of capitalized site payroll and indirect costs related to these activities for the year ended December 31, 2006.

We funded all of the above capital expenditures with cash provided by operating activities, working capital, property sales and borrowings under the revolving credit facility.

For the year ended December 31, 2006, net cash used in financing activities of $697.2 million primarily related to repayments of property loans, redemptions of Class Q Cumulative Preferred Stock, Class R Cumulative Preferred Stock and Class X Cumulative Convertible Preferred Stock, Common Stock and preferred stock dividends, distributions to minority interests, and repurchases of Common Stock. Proceeds from property loans, issuance of preferred stock and stock option exercises partially offset the cash outflow.

At December 31, 2006 and 2005, we had $6.3 billion and $5.7 billion, respectively, in consolidated mortgage debt outstanding, which included zero and $384.3 million, respectively, of mortgage debt classified within liabilities related to assets held for sale. During the year ended December 31, 2006, we refinanced or closed mortgage loans on 66 consolidated properties generating $1,224.6 million of proceeds from borrowings with a weighted average interest rate of 5.66%. Our share of the net proceeds after repayment of existing debt, payment of transaction costs and distributions to limited partners, was $589.4 million. We used these total net proceeds for capital expenditures and other corporate purposes. We intend to continue to refinance mortgage debt to generate proceeds in amounts exceeding our scheduled amortizations and maturities.

We have an Amended and Restated Senior Secured Credit Agreement with a syndicate of financial institutions, which we refer to as the Credit Agreement. On March 22, 2006, we amended various terms in our Credit Agreement, including the ability to request an increase in the aggregate commitments (which may be revolving or term loan commitments) by an amount not to exceed $150 million; a reduction in the interest rate spread applicable to revolving loans to LIBOR plus a margin that can range from 1.125% to 1.75%; a reduction in the interest rate spread applicable to letters of credit; a reduction in the spread applicable to term loans to LIBOR plus 1.5%; and an extension of the maturity dates from November 2, 2007, to May 1, 2009, for the revolver and from November 2, 2009, to March 22, 2011, for the term loans.

The aggregate amount of commitments and loans under the Credit Agreement is $850.0 million, comprised of $400.0 million in term loans and $450.0 million of revolving loan commitments. At December 31, 2006, the term loans had an outstanding principal balance of $400.0 million and an interest rate of 6.91%. At December 31, 2006, the revolving loans had an outstanding principal balance of $140.0 million and a weighted average interest rate of 6.725% (based on various weighted average LIBOR borrowings outstanding with various maturities). The amount available under the revolving credit facility at December 31, 2006, was $277.3 million (after giving effect to $32.7 million outstanding for undrawn letters of credit issued under the revolving credit facility). The proceeds of revolving loans are generally permitted to be used to fund working capital and for other corporate purposes. For more information, see Note 7 of the consolidated financial statements in Item 8.

During the year ended December 31, 2006, we redeemed all outstanding shares of our 10.0% Class R Cumulative Preferred Stock for $173.5 million, all outstanding shares of our 10.1% Class Q Cumulative Preferred Stock for $63.3 million, and all outstanding shares of our 8.5% Class X Cumulative Convertible Preferred Stock for $50.0 million. On June 29, 2006, we sold 200 shares of Series A Community Reinvestment Act Perpetual Preferred Stock, $0.01 par value per share, which we refer to as the CRA Preferred Stock, with a liquidation preference of $500,000 per share, for net proceeds of approximately $97.5 million. See Preferred Stock in Note 11 to the consolidated financial statements in Item 8 for additional information about our preferred stock transactions during 2006.

Under our shelf registration statement, as of December 31, 2006 we had available for issuance approximately $877 million of debt and equity securities and the Aimco Operating Partnership had available for issuance $500 million of debt securities.

Our Board of Directors has, from time to time, authorized us to repurchase shares of our outstanding capital stock. During the year ended December 31, 2006, we repurchased approximately 2.3 million shares of Common Stock for cash totaling approximately $120.3 million. Currently, we are authorized to repurchase up to an additional 5.7 million shares of our Common Stock under an authorization that has no expiration date. These repurchases may be made from time to time in the open market or in privately negotiated transactions.

This table summarizes information contained elsewhere in this Annual Report regarding payments due under contractual obligations and commitments as of December 31, 2006 (amounts in thousands):

In addition, we may enter into commitments to purchase goods and services in connection with the operations of our properties. Those commitments generally have terms of one year or less and reflect expenditure levels comparable to our historical expenditures.

In addition to the items set forth in “Contractual Obligations” above, we expect to fund any future acquisitions, additional redevelopment projects and capital improvements principally with proceeds from property sales (including tax-free exchange proceeds), short-term borrowings, debt and equity financings and operating cash flows.

In 2007, we plan to invest between $275 and $325 million in conventional redevelopment projects that will impact approximately 79 properties with over 30,000 units. Additionally, in 2007 redevelopment expenditures on affordable properties will be approximately $36 million, predominantly funded by third-party tax credit equity, impacting more than 15 properties with more than 1,800 units.

We own general and limited partner interests in unconsolidated real estate partnerships, in which our total ownership interests range typically from less than 1% up to 50%. However, based on the provisions of the relevant partnership agreements, we are not deemed to have control of these partnerships sufficient to require or permit consolidation for accounting purposes (see Note 2 of the consolidated financial statements in Item 8). There are no lines of credit, side agreements, or any other derivative financial instruments related to or between our unconsolidated real estate partnerships and us and no material exposure to financial guarantees. Accordingly, our maximum risk of loss related to these unconsolidated real estate partnerships is limited to the aggregate carrying amount of our investment in the unconsolidated real estate partnerships and any outstanding notes receivable as reported in our consolidated financial statements. See Note 4 of the consolidated financial statements in Item 8 for additional information about our investments in unconsolidated real estate partnerships.

Our primary market risk exposure relates to changes in interest rates. We are not subject to any foreign currency exchange rate risk or commodity price risk, or any other material market rate or price risks. We use predominantly long-term, fixed-rate non-recourse mortgage debt in order to avoid the refunding and repricing risks of short-term borrowings. We use short-term debt financing and working capital primarily to fund short-term uses

We had $1,663.4 million of floating rate debt outstanding at December 31, 2006. Of the total floating rate debt, the major components were floating rate tax-exempt bond financing ($640.6 million), floating rate secured notes ($482.8 million), revolving loans ($140.0 million), and term loans ($400.0 million). Historically, changes in tax-exempt interest rates have been at a ratio of less than 1:1 with changes in taxable interest rates. Floating rate tax-exempt bond financing is benchmarked against the BMA Index, which since 1981 has averaged 68% of the30-day LIBOR rate. If this relationship continues, an increase in30-day LIBOR of 1.0% (0.68% in tax-exempt interest rates) would result in our income before minority interests and cash flows being reduced by $14.6 million on an annual basis. This would be offset by variable rate interest income earned on certain assets, including cash and cash equivalents and notes receivable, as well as interest that is capitalized on a portion of this variable rate debt incurred in connection with our redevelopment activities. Considering these offsets, the same increase in30-day LIBOR would result in our income before minority interests and cash flows being reduced by $4.4 million on an annual basis. Comparatively, if30-day LIBOR had increased by 1% in 2005, our income before minority interests and cash flows, after considering such offsets, would have been reduced by $8.5 million on an annual basis. The potential reduction of income before minority interests was lower in 2006 as compared to 2005 primarily due to lower floating rate balances resulting from the sale of several properties that were encumbered by variable rate mortgages and the refinancing of existing variable rate mortgages.

We believe that the fair value of our floating rate secured tax-exempt bond debt and floating rate secured long-term debt as of December 31, 2006, approximate their carrying values. The fair value for our fixed-rate debt agreements was estimated based on the market rate for debt with the same or similar terms. The combined carrying amount of our fixed-rate secured tax-exempt bonds and fixed-rate secured notes payable at December 31, 2006 was $5.1 billion compared to the estimated fair value of $5.3 billion (see Note 2 to the consolidated financial statements in Item 8). If market rates for our fixed-rate debt were higher by 1%, the estimated fair value of our fixed-rate debt would have decreased from $5.3 billion to $5.0 billion. If market rates for our fixed-rate debt were lower by 1%, the estimated fair value of our fixed-rate debt would have increased from $5.3 billion to $5.6 billion.

The independent registered public accounting firm’s report, consolidated financial statements and schedule listed in the accompanying index are filed as part of this report and incorporated herein by this reference. See “Index to Financial Statements” onpage F-1of this Annual Report.

None.

Our management, with the participation of our chief executive officer and chief financial officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined inRules 13a-15(e)and15d-15(e)under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this report. Based on such evaluation, our chief executive officer and chief financial officer have concluded that, as of the end of such period, our disclosure controls and procedures are adequate.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is defined inRule 13a-15(f)and15d-15(f)under the Exchange Act as a process designed by, or under the supervision of, our principal executive and principal financial officers and effected by our Board of Directors, management and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles and includes those policies and procedures that:

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness to future periods are subject to the risks that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Management assessed the effectiveness of our internal control over financial reporting as of December 31, 2006. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework.

Based on their assessment, management concluded that, as of December 31, 2006, our internal control over financial reporting is effective.

Our independent registered public accounting firm has issued an audit report on management’s assessment of our internal control over financial reporting.

There have been no significant changes in our internal control over financial reporting (as defined inRules 13a-15(f)and15d-15(f))under the Exchange Act) during fourth quarter 2006 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

We have audited management’s assessment, included in the accompanying Management’s Report on Internal Control Over Financial Reporting, that Apartment Investment and Management Company (the “Company”) maintained effective internal control over financial reporting as of December 31, 2006, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting. Our responsibility is to express an opinion on management’s assessment and an opinion on the effectiveness of the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, evaluating management’s assessment, testing and evaluating the design and operating effectiveness of internal control, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, management’s assessment that Apartment Investment and Management Company maintained effective internal control over financial reporting as of December 31, 2006, is fairly stated, in all material respects, based on the COSO criteria. Also, in our opinion, Apartment Investment and Management Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2006, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Apartment Investment and Management Company as of December 31, 2006 and 2005, and the related consolidated statements of income, stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2006, and our report dated February 26, 2007 expressed an unqualified opinion thereon.

On February 28, 2007, AIMCO-GP, Inc., the general partner of the Aimco Operating Partnership amended and restated the Third Amended and Restated Agreement of Limited Partnership, as amended to date. AIMCO-GP, Inc. determined that the Fourth Amended and Restated Agreement of Limited Partnership includes only such amendments as are permitted to be effected by AIMCO-GP, Inc. as the general partner pursuant to the terms of the partnership agreement.

On February 17, 2006, we closed the sale of a portion of the Flamingo South Beach property known as the South Tower. The South Tower sale price was $163.5 million and included 562 residential units and our rights to the property’s marina. Additionally, the buyer paid $5 million (which is non-refundable) for the option to purchase the614-unitNorth Tower for $169 million between September 1, 2006, and February 28, 2007 (subject to the right to extend for up to six months subject to certain conditions), and the option to purchase the513-unitCentral Tower, along with the remainder of improvements on the property, for $267.5 million between December 1, 2007, and May 31, 2008 (subject to the right to extend for up to four months subject to certain conditions and provided that the buyer has previously purchased the North Tower). The agreement also granted us a $19.8 million profit participation interest in the buyer’s proposed condominium conversion after certain development fees and certain returns on the buyer’s equity have been achieved, plus twenty percent of the buyer’s net profits thereafter. On February 23, 2007, we amended the related purchase and sale agreement. The amendment gives the buyer the right to commence a marketing and sales program at the North Tower with respect to its planned condominium conversion; extends the option period for the North Tower to October 31, 2007, and extends the outside closing date to December 31, 2007. In order to extend the option period to October 31, 2007, the buyer must deliver notice by May 1, 2007, along with a $1 million non-refundable deposit. The parties entered into a revenue guarantee with respect to the North Tower whereby the buyer will pay any shortfall between actual revenue and budgeted revenue. In addition, the amendment reduced the profit participation interest to $14.8 million and, in exchange for that reduction and the buyer’s right to commence marketing and extend the closing date, the buyer has agreed to pay amounts totaling $5.0 million at the earlier of closing or at the time the buyer fails to exercise the purchase option on the North Tower.

The information required by this item is presented under the captions “Board of Directors and Officers,” “Corporate Governance Matters — Code of Ethics,” “Other Matters — Section 16(a) Beneficial Ownership Reporting Compliance,” “Corporate Governance Matters — Nominating and Corporate Governance Committee,” “Corporate Governance Matters — Audit Committee,” and “Corporate Governance Matters — Audit Committee Financial Expert” in the proxy statement for our 2007 annual meeting of stockholders and is incorporated herein by reference.

The information required by this item is presented under the captions “Compensation Discussion and Analysis,” “Compensation and Human Resources Committee Report to Stockholders,” “Summary Compensation Table,” “Grants of Plan-Based Awards,” “Outstanding Equity Awards at Fiscal Year End,” “Option Exercises and Stock Vested,” “Potential Payments Upon Termination or Change in Control,” “Corporate Governance Matters — Director Compensation,” and “Corporate Governance Matters — Compensation and Human Resources Committee Interlocks and Insider Participation,” in the proxy statement for our 2007 annual meeting of stockholders and is incorporated herein by reference.

The information required by this item is presented under the captions “Security Ownership of Certain Beneficial Owners and Management” and “Securities Authorized for Issuance Under Equity Compensation Plans” in the proxy statement for our 2007 annual meeting of stockholders and is incorporated herein by reference.

The information required by this item is presented under the caption “Certain Relationships and Related Transactions” and “Corporate Governance Matters — Independence of Directors” in the proxy statement for our 2007 annual meeting of stockholders and is incorporated herein by reference.

The information required by this item is presented under the caption “Principal Accountant Fees and Services” in the proxy statement for our 2007 annual meeting of stockholders and is incorporated herein by reference.

(a)(1) The financial statements listed in the Index to Financial Statements onPage F-1of this report are filed as part of this report and incorporated herein by reference.

(a)(2) The financial statement schedule listed in the Index to Financial Statements onPage F-1of this report is filed as part of this report and incorporated herein by reference.

(a)(3) The Exhibit Index is incorporated herein by reference.

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 1st day of March 2007.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

We have audited the accompanying consolidated balance sheets of Apartment Investment and Management Company as of December 31, 2006 and 2005, and the related consolidated statements of income, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2006. Our audits also included the financial statement schedule listed in the accompanying Index to Financial Statements. These financial statements and schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of Apartment Investment and Management Company at December 31, 2006 and 2005, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2006, in conformity with United States generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects the information set forth therein.

As discussed in Note 2 to the consolidated financial statements, in 2006 the Company adopted the provisions of Emerging Issues Task Force Issue04-5,Determining Whether a General Partner, or the General Partners as a Group, Controls a Limited Partnership or Similar Entity When the Limited Partners Have Certain Rights.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the effectiveness of Apartment Investment and Management Company’s internal control over financial reporting as of December 31, 2006, based on criteria established inInternal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 26, 2007 expressed an unqualified opinion thereon.