Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements of AvalonBay Communities, Inc. and in the related Prospectus of our reports dated February 25, 2009, with respect to the consolidated financial statements and schedule of AvalonBay Communities, Inc. and the effectiveness of internal control over financial reporting of AvalonBay Communities, Inc., included in this Annual Report (Form 10-K) for the year ended December 31, 2008.

Form S-3		Form S-8
No. 333-87063		No. 333-16837
No. 333-15407		No. 333-115290
No. 333-107413		No. 333-150742
No. 333-139839

Mclean, Virginia
February 25, 2009