UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K/A

(Amendment No. 1)

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2005

Commission file number 1-32375

Comstock Homebuilding Companies, Inc.

(Exact Name of Registrant as Specified in Its Charter)

11465 Sunset Hills Road

Suite 510 Reston, Virginia 20190

(703) 883-1700

(Address, including zip code, and telephone number, including area code, of principal executive offices)

Securities registered pursuant to Section 12(b) of the Act:

None

Securities registered pursuant to Section 12(g) of the Act:

Class A common stock, par value $.01 per share

(Title of Class)

     Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.     Yes o          No þ

      Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.     Yes o          No þ

      Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes þ          No o

      Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.     o

      Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (check one) Large Accelerated filer o          Accelerated filer þ          Non-accelerated filer o          

      Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of The Act).     Yes o          No þ

      The aggregate market value of voting and non-voting common equity held by nonaffiliates of the registrant (6,119,240 shares) based on the last reported sale price of the registrant’s common equity on the Nasdaq National Market on June 30, 2005, which was the last business day of the registrant’s most recently completed second fiscal quarter, was $148,207,993. For purposes of this computation, all officers, directors, and 10% beneficial owners of the registrant are deemed to be affiliates. Such determination should not be deemed to be an admission that such officers, directors, or 10% beneficial owners are, in fact, affiliates of the registrant.

      As of March 15, 2006, there were outstanding 11,260,642 shares of the registrant’s Class A common stock, par value $.01 per share, and 2,733,500 shares of the registrant’s Class B common stock, par value $.01 per share.

DOCUMENTS INCORPORATED BY REFERENCE

      Portions of the registrant’s definitive Proxy Statement for the 2006 Annual Meeting of Stockholders are incorporated by reference into Part III of this Form 10-K.

SIGNATURES

      Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Amendment No. 1 to the annual report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: March 16, 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 date indicated.