UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 31)*

SHELTER PROPERTIES IV LIMITED PARTNERSHIP

(Name of Issuer)

Limited Partnership Units

(Title of Class of Securities)

None

(CUSIP Number)

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

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

With a copy to:
Gregory M. Chait
Alston & Bird LLP
One Atlantic Center
1201 West Peachtree Street
Atlanta, GA 30309
(404) 881-7000

October 1, 2010

(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).

NAME OF REPORTING PERSONS

AIMCO PROPERTIES, L.P.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) o

(b) þ

SEC USE ONLY

SOURCE OF FUNDS (SEE INSTRUCTIONS)

Not applicable.

CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

SOLE VOTING POWER

NUMBER OF

—

SHARED VOTING POWER

BENEFICIALLY

OWNED BY

36,650 Limited Partnership Units

EACH

SOLE DISPOSITIVE POWER

REPORTING

PERSON

—

WITH

SHARED DISPOSITIVE POWER

36,650 Limited Partnership Units

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

36,650 Limited Partnership Units

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

Approximately 73.3%

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

NAME OF REPORTING PERSONS

AIMCO-GP, INC.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) o

(b) þ

SEC USE ONLY

SOURCE OF FUNDS (SEE INSTRUCTIONS)

Not applicable.

CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

SOLE VOTING POWER

NUMBER OF

—

SHARED VOTING POWER

BENEFICIALLY

OWNED BY

36,650 Limited Partnership Units

EACH

SOLE DISPOSITIVE POWER

REPORTING

PERSON

—

WITH

SHARED DISPOSITIVE POWER

36,650 Limited Partnership Units

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

36,650 Limited Partnership Units

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

Approximately 73.3%

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

NAME OF REPORTING PERSONS

APARTMENT INVESTMENT AND MANAGEMENT COMPANY

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) o

(b) þ

SEC USE ONLY

SOURCE OF FUNDS (SEE INSTRUCTIONS)

Not applicable.

CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

SOLE VOTING POWER

NUMBER OF

—

SHARED VOTING POWER

BENEFICIALLY

OWNED BY

36,650 Limited Partnership Units

EACH

SOLE DISPOSITIVE POWER

REPORTING

PERSON

—

WITH

SHARED DISPOSITIVE POWER

36,650 Limited Partnership Units

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

36,650 Limited Partnership Units

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

Approximately 73.3%

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

NAME OF REPORTING PERSONS

AIMCO IPLP, L.P.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) o

(b) þ

SEC USE ONLY

SOURCE OF FUNDS (SEE INSTRUCTIONS)

Not applicable.

CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

SOLE VOTING POWER

NUMBER OF

—

SHARED VOTING POWER

BENEFICIALLY

OWNED BY

19,737 Limited Partnership Units

EACH

SOLE DISPOSITIVE POWER

REPORTING

PERSON

—

WITH

SHARED DISPOSITIVE POWER

19,737 Limited Partnership Units

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

19,737 Limited Partnership Units

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

Approximately 39.5%

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

NAME OF REPORTING PERSONS

AIMCO/IPT, INC..

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) o

(b) þ

SEC USE ONLY

SOURCE OF FUNDS (SEE INSTRUCTIONS)

Not applicable.

CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

SOLE VOTING POWER

NUMBER OF

—

SHARED VOTING POWER

BENEFICIALLY

OWNED BY

19,737 Limited Partnership Units

EACH

SOLE DISPOSITIVE POWER

REPORTING

PERSON

—

WITH

SHARED DISPOSITIVE POWER

19,737 Limited Partnership Units

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

19,737 Limited Partnership Units

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

Approximately 39.5%

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

NAME OF REPORTING PERSONS

COOPER RIVER PROPERTIES, L.L.C.

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) o

(b) þ

SEC USE ONLY

SOURCE OF FUNDS (SEE INSTRUCTIONS)

Not applicable.

CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)

CITIZENSHIP OR PLACE OF ORGANIZATION

Delaware

SOLE VOTING POWER

NUMBER OF

—

SHARED VOTING POWER

BENEFICIALLY

OWNED BY

3,685 Limited Partnership Units

EACH

SOLE DISPOSITIVE POWER

REPORTING

PERSON

—

WITH

SHARED DISPOSITIVE POWER

3,685 Limited Partnership Units

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

3,685 Limited Partnership Units

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

Approximately 7.4%

TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

Introductory Note

This Amendment No. 31 (this “Amendment No. 31”) is filed with respect to the issuer, Shelter Properties IV Limited Partnership, a South Carolina limited partnership (the “Partnership”), by AIMCO Properties, L.P. (“AIMCO Properties”), AIMCO-GP, Inc. (“AIMCO GP”), Apartment Investment and Management Company (“AIMCO”), AIMCO IPLP, L.P. (“AIMCO IPLP”), AIMCO/IPT, INC. (“AIMCO/IPT”), and Cooper River Properties, L.L.C. (“Cooper River Properties” and together with AIMCO Properties, AIMCO-GP, AIMCO, AIMCO IPLP and AIMCO/IPT, the “Reporting Persons”). This Amendment No. 31 amends and supplements the statement on Schedule 13D, as amended and supplemented to date (the “Schedule 13D”), previously filed with the Securities and Exchange Commission with respect to the Partnership by the Reporting Persons or certain of their affiliates.

The Schedule 13D is amended to make the following changes to Items 4 and 5:

Item 4. Purpose of Transaction

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

The Reporting Persons, which are all affiliates of Shelter Realty IV Corporation, the corporate general partner of the Partnership (the “Corporate General Partner”), have reviewed their investment in the Partnership in light of numerous factors, including, without limitation, general market and economic conditions, their on-going analysis of the Partnership’s business, financial condition, operations and prospects, and the relative attractiveness of alternative investment opportunities. As part of this review, the Corporate General Partner and AIMCO Properties are considering a merger transaction in which AIMCO Properties would acquire 100% ownership 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 the Corporate General Partner 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.

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: October 1, 2010

		AIMCO PROPERTIES, L.P.

		By: AIMCO-GP, INC.
		its General Partner

		APARTMENT INVESTMENT AND MANAGEMENT COMPANY

		AIMCO IPLP, L.P.

		By: AIMCO/IPT, INC. its General Partner

		AIMCO-GP, INC.

		AIMCO/IPT, INC.

		COOPER RIVER PROPERTIES, L.L.C.

		By:		/s/ Derek McCandless Derek McCandless
				Senior Vice President
				of each of the foregoing entities

SHELTER PROPERTIES IV LIMITED PARTNERSHIP SC 13D/A