Summary of AMERICAN COMMUNITY PROPERTIES TRUST

Item 4.01 Change in Registrant's Certifying Accountant

(a) On April 17, 2009, American Community Properties Trust ("ACPT" or the "Company) advised Ernst & Young LLP ("E&Y") that it was being dismissed as the Company's independent registered public accounting firm. The decision to dismiss E&Y was considered and approved by the Audit Committee of the Company's Board of Trustees on April 17, 2009. E&Y's reports on ACPT's consolidated financial statements for the fiscal years ended December 31, 2008 and 2007, did not contain an adverse opinion or disclaimer of opinion, and were not qualified or modified as to uncertainty, audit scope or accounting principles. During the fiscal years ended December 31, 2008 and 2007, and through the interim period ended April 17, 2009, there were no disagreements with E&Y on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures which disagreements, if not resolved to E&Y's satisfaction, would have caused E&Y to make reference to the subject matter of the disagreements in connection with their report on the Registrant's consolidated financial statements; in addition, there were no reportable events as listed in Item 304(a)(1)(v) of Regulation S-K. ACPT has complied with Item 304(a)(3) of Regulation S-K. The Company has requested E&Y to furnish it a letter addressed to the Commission stating whether it agrees with the above statements. A copy of that letter, dated April 20, 2009 is filed as Exhibit 16.1 to this Form 8-K. The Company has authorized EY to respond to inquires of the Company's successor auditor.

(b) On April 17, 2009, ACPT appointed Grant Thornton LLP ("GT") as the Company's independent registered public accounting firm for fiscal year ending December 31, 2009. Neither the Company nor anyone on its behalf has consulted with GT during the last two fiscal years ended December 31, 2008 and 2007, or during any subsequent interim period preceding the date hereof, regarding either (i) the application of accounting principles to a specified transaction, either completed or proposed; or the type of audit opinion that might be rendered on ACPT's consolidated financial statements; and as such, no written report or oral advice was provided, and none was an important factor considered by the Company in reaching a decision as to the accounting, auditing or financial reporting issues; or (ii) or any matter that was either the subject of a disagreement or a reportable event, as there were none.