UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. 29 )*

Century Properties Fund XV

(Name of Issuer)

Limited Partnership Units

(Title of Class of Securities)

None

(CUSIP Number)

John Bezzant
Executive Vice President
Apartment Investment and Management Company
55 Beattie Place
P.O. Box 1089
Greenville, South Carolina 29601
Telephone: (864) 239-1000

with a copy to:

Paul J. Nozick
Alston & Bird LLP
One Atlantic Center
1201 West Peachtree Street
Atlanta, GA 30309
(404) 881-7000

(Name, Address and Telephone Number of Person Authorized to

Receive Notices and Communications)

July 26, 2011

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

* 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 disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 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).

CUSIP No. Not Applicable 

1	NAME OF REPORTING PERSON: AIMCO PROPERTIES, L.P. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY): 84-1275721
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)   o
	(b)   þ
3	SEC USE ONLY
4	SOURCE OF FUNDS
	WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):
	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
		7	SOLE VOTING POWER
NUMBER OF
SHARES		8	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			65,841.34 Units
EACH		9	SOLE DISPOSITIVE POWER
REPORTING
PERSON
WITH		10	SHARED DISPOSITIVE POWER
			65,841.34 Units
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	65,841.34 Units
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	Approximately 73.18%
14	TYPE OF REPORTING PERSON
	PN

CUSIP No. Not Applicable 

1	NAME OF REPORTING PERSON: AIMCO-GP, INC. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)   o
	(b)   þ
3	SEC USE ONLY
4	SOURCE OF FUNDS
	WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):
	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
		7	SOLE VOTING POWER
NUMBER OF
SHARES		8	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			65,841.34 Units
EACH		9	SOLE DISPOSITIVE POWER
REPORTING
PERSON
WITH		10	SHARED DISPOSITIVE POWER
			65,841.34 Units
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	65,841.34 Units
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	Approximately 73.18%
14	TYPE OF REPORTING PERSON
	CO

CUSIP No. Not Applicable 

1	NAME OF REPORTING PERSON: APARTMENT INVESTMENT AND MANAGEMENT COMPANY I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY): 84-1259577
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)   o
	(b)   þ
3	SEC USE ONLY
4	SOURCE OF FUNDS
	WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):
	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION
	Maryland
		7	SOLE VOTING POWER
NUMBER OF
SHARES		8	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			65,841.34 Units
EACH		9	SOLE DISPOSITIVE POWER
REPORTING
PERSON
WITH		10	SHARED DISPOSITIVE POWER
			65,841.34 Units
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	65,841.34 Units
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	Approximately 73.18%
14	TYPE OF REPORTING PERSON
	CO

CUSIP No. Not Applicable 

1	NAME OF REPORTING PERSON: AIMCO IPLP, L.P. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)   o
	(b)   þ
3	SEC USE ONLY
4	SOURCE OF FUNDS
	WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):
	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
		7	SOLE VOTING POWER
NUMBER OF
SHARES		8	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			39,802.17 Units
EACH		9	SOLE DISPOSITIVE POWER
REPORTING
PERSON
WITH		10	SHARED DISPOSITIVE POWER
			39,802.17 Units
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	39,802.17 Units
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	Approximately 44.24 %
14	TYPE OF REPORTING PERSON
	PN

CUSIP No. Not Applicable 

1	NAME OF REPORTING PERSON: AIMCO/IPT, INC. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)   o
	(b)   þ
3	SEC USE ONLY
4	SOURCE OF FUNDS
	WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):
	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
		7	SOLE VOTING POWER
NUMBER OF
SHARES		8	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			39,902.17 Units
EACH		9	SOLE DISPOSITIVE POWER
REPORTING
PERSON
WITH		10	SHARED DISPOSITIVE POWER
			39,902.17 Units
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	39,902.17 Units
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	Approximately 44.35 %
14	TYPE OF REPORTING PERSON
	CO

CUSIP No. Not Applicable 

1	NAME OF REPORTING PERSON: MADISON RIVER PROPERTIES, L.L.C. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY):
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a)   o
	(b)   þ
3	SEC USE ONLY
4	SOURCE OF FUNDS
	WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):
	o
6	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
		7	SOLE VOTING POWER
NUMBER OF
SHARES		8	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			4,222 Units
EACH		9	SOLE DISPOSITIVE POWER
REPORTING
PERSON
WITH		10	SHARED DISPOSITIVE POWER
			4,222 Units
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	4,222 Units
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
	o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	Approximately 4.69 %
14	TYPE OF REPORTING PERSON
	OO

Introductory Note

          This Amendment No. 29 (this “Amendment”) amends the Statement on Schedule 13D previously filed with the Securities and Exchange Commission by AIMCO Properties, L.P. (“AIMCO Properties”), AIMCO-GP, Inc., Apartment Investment and Management Company, AIMCO IPLP, L.P., AIMCO/IPT, Inc., and Madison River Properties, L.L.C. (collectively, the “Reporting Persons”).

Item 4. Purpose of Transaction

Item 4 is hereby supplemented by the addition of the following information:

          The general partners of Century Properties Fund XV, a California limited partnership (the “Partnership”), are Fox Capital Management Corporation (“FCMC”), a California corporation, and Fox Realty Investors (“FRI”), a California general partnership. FCMC, as well as the managing general partner of FRI, are affiliates of the Reporting Persons. The Reporting Persons have reviewed their investment in the Partnership in light of numerous factors, including, without limitation, general market and economic conditions, their ongoing analysis of the Partnership’s business, financial condition, operations and prospects, the relative attractiveness of alternative investment opportunities and other future developments. As part of this review, FCMC and AIMCO Properties are considering a merger transaction in which AIMCO Properties would acquire 100% ownership of the limited partnership interests of the Partnership. The transaction, if consummated, would result in the Partnership’s equity securities becoming eligible for termination of registration pursuant to Section 12(g)(4) of the Securities Exchange Act of 1934, as amended.

          The terms of the above-described transaction are still being considered, and either AIMCO Properties or FCMC may decide not to pursue the transaction, or to pursue a different transaction. Although the foregoing reflects potential activities presently contemplated by the Reporting Persons with respect to the Partnership, the foregoing is subject to change at any time, and there can be no assurance that the Reporting Persons will take any of the actions referred to above or participate in a group that will take any of the actions referred to above.

Item 5. Interest in Securities of the Issuer

     Item 5 is hereby amended and restated in its entirety as follows:

     (a)-(b) The information in lines (7) through (11) and (13) of each Reporting Person’s cover page is incorporated herein by reference.

Item 7. Material to Be Filed as Exhibits

The following is filed herewith as an Exhibit to this Statement:

Exhibit 7.1 Agreement of Joint Filing, dated January 19, 2007 (incorporated by reference to Exhibit 7.1 to Amendment No. 28 to the Reporting Persons’ Schedule 13D, dated January 19, 2007).

SIGNATURE

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

Dated: July 26, 2011
AIMCO PROPERTIES, L.P.
By:	AIMCO-GP, INC.
its General Partner
AIMCO-GP, INC. APARTMENT INVESTMENT AND MANAGEMENT COMPANY AIMCO IPLP, L.P.
By:	AIMCO/IPT, INC.
its General Partner
AIMCO/IPT, INC. MADISON RIVER PROPERTIES, L.L.C.
By:	/s/ Trent A. Johnson
	Name:	Trent A. Johnson
	Title:	Vice President and Assistant General Counsel