Form: SC 13G/A

Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

February 14, 2005

SC 13G/A: Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

Published on February 14, 2005





UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No.7)*

AVALON BAY COMMUNITIES, INC.
--------------------------------------
(Name of Issuer)

Common
------
(Title of Class of Securities)

053484101
---------
(CUSIP Number)


Date of Event which Requires Filing of this Statement

DECEMBER 31, 2004
----------------

Check the appropriate box to designate the rule pursuant to which the Schedule
is filed:

[x] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in prior coverage.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of the Securities Exchange Act of 1934 ("Act") or
otherwise subject to the liabilities of that section of the Act but shall be
subject to all other provisions of the Act (however, see the Notes).

SEC 1745 (12-02)
Page 1







SCHEDULE 13G

CUSIP No. 053484101 Page 2 of 7 Pages
- -------------------------------------------------------------------------------
1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (entities only)

Cohen & Steers, Inc.
14-1904657
- -------------------------------------------------------------------------------
2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]

- -------------------------------------------------------------------------------
3) SEC USE ONLY



- -------------------------------------------------------------------------------
4) CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

- -------------------------------------------------------------------------------
NUMBER 5) SOLE VOTING POWER
OF 5,484,668
SHARES _____________________________________________________________
BENEFICIALLY 6) SHARED VOTING POWER
OWNED BY 25,994
EACH _____________________________________________________________
REPORTING 7) SOLE DISPOSITIVE POWER
PERSON 5,484,668
WITH _____________________________________________________________
8) SHARED DISPOSITIVE POWER
25,994
- -------------------------------------------------------------------------------
9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

6,322,662

- -------------------------------------------------------------------------------
10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES

[ ]
- -------------------------------------------------------------------------------
11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


8.8%
- -------------------------------------------------------------------------------
12) TYPE OF REPORTING PERSON


HC
- -------------------------------------------------------------------------------

*SEE INSTRUCTIONS BEFORE FILLING OUT!

Page 2

SCHEDULE 13G

CUSIP No. 053484101 Page 3 of 7 Pages
- -------------------------------------------------------------------------------
1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (entities only)

Cohen & Steers Capital Management, Inc.
13-335336
- -------------------------------------------------------------------------------
2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]

- -------------------------------------------------------------------------------
3) SEC USE ONLY



- -------------------------------------------------------------------------------
4) CITIZENSHIP OR PLACE OF ORGANIZATION

New York

- -------------------------------------------------------------------------------
NUMBER 5) SOLE VOTING POWER
OF 5,484,668
SHARES _____________________________________________________________
BENEFICIALLY 6) SHARED VOTING POWER
OWNED BY 0
EACH _____________________________________________________________
REPORTING 7) SOLE DISPOSITIVE POWER
PERSON 6,296,668
WITH _____________________________________________________________
8) SHARED DISPOSITIVE POWER
0
- -------------------------------------------------------------------------------
9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

6,296,668

- -------------------------------------------------------------------------------
10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES

[ ]
- -------------------------------------------------------------------------------
11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


8.7%
- -------------------------------------------------------------------------------
12) TYPE OF REPORTING PERSON


IA
- -------------------------------------------------------------------------------

*SEE INSTRUCTIONS BEFORE FILLING OUT!

Page 2


SCHEDULE 13G

CUSIP No. 053484101 Page 4 of 7 Pages
- -------------------------------------------------------------------------------
1) NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (entities only)

Houlihan Rovers SA

- -------------------------------------------------------------------------------
2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(a) [ ]
(b) [x]

- -------------------------------------------------------------------------------
3) SEC USE ONLY



- -------------------------------------------------------------------------------
4) CITIZENSHIP OR PLACE OF ORGANIZATION

Belgium

- -------------------------------------------------------------------------------
NUMBER 5) SOLE VOTING POWER
OF 25,994
SHARES _____________________________________________________________
BENEFICIALLY 6) SHARED VOTING POWER
OWNED BY 0
EACH _____________________________________________________________
REPORTING 7) SOLE DISPOSITIVE POWER
PERSON 25,994
WITH _____________________________________________________________
8) SHARED DISPOSITIVE POWER
0
- -------------------------------------------------------------------------------
9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

25,994

- -------------------------------------------------------------------------------
10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES

[ ]
- -------------------------------------------------------------------------------
11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)


0.04%
- -------------------------------------------------------------------------------
12) TYPE OF REPORTING PERSON


IA
- -------------------------------------------------------------------------------

*SEE INSTRUCTIONS BEFORE FILLING OUT!

Page 2





SCHEDULE 13G Page 5 of 7

Item 1(a) Name of Issuer

AVALONBAY COMMUNITIES, INC.

Item 1(b) Address of Issuer's Principal Executive Office

2900 EISENHOWER AVE.
SUITE 300
ALEXANDRIA, VA 22314

Item 2(a) Name of Person(s) Filing

Cohen & Steers, Inc.
Cohen & Steers Capital Management, Inc.
Houlihan Rovers SA

Item 2(b) Address of Principal Business Office

The principal address of Cohen & Steers, Inc. and Cohen & Steers
Capital Management, Inc. is:
757 Third Avenue
New York, New York 10017

The principal address for Houlihan Rovers SA is
Chausee de la Hulpe 116, 1170 Brussels, Belgium

Item 2(c) Citizenship or Place of Orgainization

Cohen & Steers, Inc.: Delaware
Cohen & Steers Capital Management, Inc.: New York
Houlihan Rovers SA: Belgium

Item 2(d) Title of Class of Securities

Common

Item 2(e) CUSIP Number

053484101

Item 3. If this statement is filed pursuant to Rule 13d-l(b), or
13d-2(b), check whether the person filing is a

(a) [ ] Broker or Dealer registered under Section 15 of the Act

(b) [ ] Bank as defined in Section 3(a)(6) of the Act

(c) [ ] Insurance Company as defined in section 3(a)(19) of
the Act

(d) [ ] Investment Company registered under Section 8 of the
Investment Company Act

(e) [X] An investment advisor in accordance with Section
240.13d-1(b)(1)(ii)(E)

(f) [ ] An employee benefit plan or endowment fund in accordance
with 240.13d-1(b)(1)(ii)(F)

(g) [X] A parent holding company or control person in accordance
with Section 240.13d-l(b)(1)(ii)(G)

(h) [ ] A savings association as defined in Section 3(b) of the
Federal Deposit Insurance Act (12 U.S.C. 1813)

(i) [ ] A church plan that is excluded from the definition of an
investment company under section 3(c)(14) of the
Investment Company Act of 1940 (15U.S.C. 80a-3)

(j) [ ] Group, in accordance with Section 240.13d-1(b)(l)(ii)(J)




Page 6 of 7


Item 4 Ownership

(a) Amount of Shares Beneficially Owned See row 9 on cover
page

(b) Percent of Class See row 11 on cover
page

(c) Number of Shares as to which such person has:

(i) sole power to vote or to direct
the vote See row 5 on cover
sheet

(ii) shared power to vote or to direct the vote
See row 6 on cover
sheet

(iii) sole power to dispose or to direct the
disposition of See row 7 on cover
page

(iv) shared power to dispose or to direct
the disposition of See row 8 on cover
page

Item 5 Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the
date hereof the reporting person has ceased to be the beneficial
owner of more than five percent of the class of securities, check
the following. []

Item 6 Ownership of More than Five Percent on Behalf of Another Person

NA

Item 7 Identification and Classification of the Subsidiary Which Acquired
the Security Being Reported on By the Parent Holding Company

Cohen & Steers, Inc., holds a 100% interest in Cohen & Steers Capital
Management, Inc., an investment advisor registered under Section 203 of the
Investment Advisers Act, and holds a 50% interest in Houlihan Rovers SA, an
investment advisor registered under Section 203 of the Investment Advisers Act.


Item 8 Identification and Classification of Members of the Group

Cohen & Steers, Inc., holds a 100% interest in Cohen & Steers Capital
Management, Inc., an investment advisor registered under Section 203 of the
Investment Advisers Act, and holds a 50% interest in Houlihan Rovers SA, an
investment advisor registered under Section 203 of the Investment Advisers Act.

Item 9 Notice of Dissolution of the Group

NA

Item 10 Certification

By signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were acquired and are held in the ordinary course
of business and were not acquired and are not held for the purpose of or with
the effect of changing or influencing the control of the issuer of the
securities and were not acquired in connection with or as a participant in any
transaction having that purpose or effect.


Signature
- ---------

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

February 14, 2005


/s/Robert Steers
- ----------------------------------
Signature


Robert H. Steers, Co-Chairman and Co Chief Executive Officer
Cohen & Steers, Inc.
Cohen & Steers Capital Management, Inc.
- ------------------------------------------------------------
Name and Title


/s/Joseph Houlihan
- ----------------------------------
Signature


Joseph W. Houlihan, Managaing Director
Houlihan Rovers SA
- ------------------------------------------------------------
Name and Title


page 7 of 7

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) promulgated under the Securities
Exchange Act of 1934, as amended, the undersigned hereby agree to the joint
filing with all other Reporting Persons (as such term is defined in the Schedule
13G referred to below) on behalf of each of them of a Statement on Schedule 13G
including amendments thereto) with respect to the common shares of AVALONBAY
PROPERTIES, INC, and that this Agreement may be included as an Exhibit to such
joint filing. This Agreement may be executed in any number of counterparts, all
of which together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this Agreement as
of February 14, 2005.


COHEN & STEERS, INC.

By: /S/ROBERT STEERS
---------------------------------
Name: ROBERT H. STEERS
Title: CO-CHARIMAN AND CO-CHIEF EXECUTIVE OFFICER



COHEN & STEERS CAPITAL MANAGEMENT, INC.

By: /S/ ROBERT STEERS
-----------------------------------
Name: ROBERT H. STEERS
Title: CO-CHAIRMAN AND CO-CHIEF EXECUTIVE OFFICER


HOULIHAN ROVERS SA


By: /S/ JOSEPH HOULIHAN
-----------------------------------
Name: JOSPEH W. HOULIHAN
Title: MANAGING DIRECTOR