POA DOCUMENT

LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS


Know all by these presents, that the undersigned hereby constitutes and
appoints each of Thomas J. Sargeant, Catherine T. White and Edward M. Schulman,
signing singly, the undersigned's true and lawful attorney-in-fact to:

(1) Execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer, director and/or stockholder of AvalonBay Communities, Inc. (the
"Company"), Forms 3, 4 and 5 and amendments thereto in accordance with Section
16(a) of the Secruties Exchange Act of 1934 and the rules thereunder;

(2) Do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4, or 5
or amendment thereto and timely file such form with the United States Securities
and Exchange Commission (the "SEC") and any stock exchange or similar authority;
and

(3) Take any other action of any type whatsoever which, in the opinion of such
attorney-in-fact, may be necessary or desirable in connection with the foregoing
authority, it being understoood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney
shall be insuch form and shall contain such terms and conditions as such
attorney-in-fact may approve.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this Poer of Attorney and the rights and powers herein
granted. The undersigned acknowledges that theforegoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to compl
with Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transaction in the securities of the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact. This Power of Attorney may be filed with the SEC
as a confirming statement of the authority granted herein.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 13th day of December, 2012.




/s/ Kevin P. O'Shea
_________________________________
Signature