SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

----------

SCHEDULE TO

(Rule 14d-100)

TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)
OF THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. )

WINTHROP GROWTH INVESTORS 1 LIMITED PARTNERSHIP
- --------------------------------------------------------------------------------
(Name of Subject Company (Issuer))

AIMCO PROPERTIES, L.P. - OFFEROR
- --------------------------------------------------------------------------------
(Names of Filing Persons (Identifying Status as Offeror, Issuer or Other Person)

LIMITED PARTNERSHIP UNITS
- --------------------------------------------------------------------------------
(Title of Class of Securities)

NONE
- --------------------------------------------------------------------------------
(CUSIP Number of Class of Securities)

Patrick J. Foye
Executive Vice President
Apartment Investment and Management Company
4582 South Ulster Street Parkway, Suite 1100
Denver, Colorado 80237
(303) 757-8081
- --------------------------------------------------------------------------------
(Name Address and Telephone Number of Person
Authorized to Receive Notices and Communications on Behalf of Filing Persons)

Copies to:

Gregory M. Chait
Robert Barker
Powell, Goldstein, Frazer & Murphy LLP
191 Peachtree Street, N.E., Suite 1600
Atlanta, Georgia 30303
(404) 572-6600

CALCULATION OF FILING FEE

<Table>
<Caption>
Transaction Valuation* Amount of Filing Fee
- ---------------------- --------------------

$7,098,420 $574.26

</Table>

* For purposes of calculating the fee only. This amount assumes the
purchase of 12,675.75 units of limited partnership interest of Winthrop
Growth Investors 1 Limited Partnership for $560.00 per unit. The amount
of the filing fee, calculated in accordance with Section 14(g)(1)(B)(3)
and Rule 0-11(d) under the Securities Exchange Act of 1934, as amended,
equals $80.90 per $1,000,000 of the maximum aggregate offering price.

[ ] Check the box if any part of the fee is offset as provided by Rule
0-11(a)(2) and identify the filing with which the offsetting fee was
previously paid. Identify the previous filing by registration statement
number, or the Form or Schedule and the date of its filing.

Amount Previously Paid: Filing Party:
------------ -------------------

Form or Registration No.: Date Filed:
---------- ---------------------

[ ] Check the box if the filing relates solely to preliminary communications
made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which
the statement relates:

<Table>

[X] third-party tender offer subject to Rule 14d-1. [ ] going-private transaction subject to Rule 13e-3.

[ ] issuer tender offer subject to Rule 13e-4. [ ] amendment to Schedule 13D under Rule 13d-2.
</Table>

Check the following box if the filing is a final amendment reporting
the results of the tender offer: [ ]

TENDER OFFER STATEMENT

This Tender Offer Statement on Schedule TO relates to the tender offer
by AIMCO Properties, L.P., a Delaware limited partnership ("AIMCO Properties"),
to purchase units of limited partnership interest of Winthrop Growth Investors 1
Limited Partnership, a Massachusetts limited partnership, at a price of $560.00
per unit in cash, subject to the conditions set forth in the Offer to Purchase,
dated May 9, 2003 (the "Offer to Purchase"), and in the related Letter of
Transmittal and Acknowledgment and Agreement, which, as amended and supplemented
from time to time, together constitute the tender offer. Copies of the Offer to
Purchase, Letter of Transmittal and Acknowledgment and Agreement are filed with
this Schedule TO as Exhibits (a)(1), (a)(2) and (a)(3), respectively. The item
numbers and responses thereto below are provided in accordance with the
requirements of Schedule TO.

ITEM 1. SUMMARY TERM SHEET.

The information set forth under "SUMMARY TERM SHEET" in the Offer to
Purchase is incorporated herein by reference.

ITEM 2. SUBJECT COMPANY INFORMATION.

(a) - (c) The information set forth under "THE OFFER--Section 13.
Certain Information Concerning Your Partnership" in the Offer to Purchase is
incorporated herein by reference.

ITEM 3. IDENTITY AND BACKGROUND OF FILING PERSON.

(a) - (c) This Schedule TO is being filed by AIMCO Properties.
AIMCO-GP, Inc., a Delaware corporation ("AIMCO-GP"), is the general partner of
AIMCO Properties and a wholly owned subsidiary of Apartment Investment and
Management Company, a Maryland corporation ("AIMCO"). The principal business of
AIMCO, AIMCO-GP and AIMCO Properties is the ownership, acquisition, development,
expansion and management of multi-family apartment properties. The business
address of AIMCO Properties is 4582 South Ulster Street Parkway, Suite 1100,
Denver, Colorado 80237, and its telephone number is (303) 757-8101.

The information set forth under "THE OFFER--Section 8. Information
Concerning Us and Certain of Our Affiliates" in the Offer to Purchase is
incorporated herein by reference.

During the past five years, none of AIMCO, AIMCO-GP or AIMCO
Properties, nor, to the best of their knowledge, any of the persons listed in
Annex I to the Offer to Purchase (i) has been convicted in a criminal proceeding
(excluding traffic violations or similar misdemeanors), or (ii) was a party to a
civil proceeding of a judicial or administrative body of competent jurisdiction
and as a result of such proceeding was or is subject to a judgment, decree or
final order enjoining future violations of, or prohibiting activities subject
to, federal or state securities laws, or finding any violation with respect to
such laws.

ITEM 4. TERMS OF THE TRANSACTION.

(a) The information set forth under "SUMMARY TERM SHEET" and "THE
OFFER" in the Offer to Purchase and the information set forth in the related
Letter of Transmittal is incorporated herein by reference.

ITEM 5. PAST CONTACTS, TRANSACTIONS, NEGOTIATIONS AND AGREEMENTS.

(a) and (b) The information set forth under "SUMMARY TERM
SHEET--Conflicts of Interest," "THE OFFER--Section 9. Background and Reasons for
the Offer" and "THE OFFER--Section 11. Conflicts of Interest and Transactions
with Affiliates" in the Offer to Purchase is incorporated herein by reference.

ITEM 6. PURPOSES OF THE TRANSACTION AND PLANS OR PROPOSALS.

(a), (c)(1) - (7) The information set forth under "SUMMARY TERM
SHEET--The Offer, "THE OFFER--Section 9. Background and Reasons for the Offer"
and "THE OFFER--Section 12. Future Plans of the Purchaser" in the Offer to
Purchase is incorporated herein by reference.

ITEM 7. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

(a), (b) and (d) The information set forth under "SUMMARY TERM
SHEET--Availability of Funds," "THE OFFER--Section 15. Source of Funds" and "THE
OFFER--Section 19. Fees and Expenses" in the Offer to Purchase is incorporated
herein by reference.

ITEM 8. INTEREST IN SECURITIES OF THE SUBJECT COMPANY.

(a) The information set forth under "THE OFFER--Certain Information
Concerning Your Partnership" in the Offer to Purchase is incorporated herein by
reference.

(b) Not applicable.

ITEM 9. PERSONS/ASSETS, RETAINED, EMPLOYED, COMPENSATED OR USED.

The information set forth under "THE OFFER--Section 19. Fees and
Expenses" in the Offer to Purchase is incorporated herein by reference.

ITEM 10. FINANCIAL STATEMENTS.

(a) The financial statements included in AIMCO Properties' Annual
Report on Form 10-K for the year ended December 31, 2002, which are listed on
the Index to Financial Statements on page F-1 of such report, are incorporated
herein by reference. Such reports may be inspected at the Securities and
Exchange Commission's (the "Commission") public reference

room in Washington, D.C., located at 450 5th Street, N.W., Room 1024,
Washington, D.C. 20549, telephone 1-800-SEC-0330. A copy of the report can be
also obtained from the Commission's web site at www.sec.gov.

(b) Not applicable.

ITEM 11. ADDITIONAL INFORMATION.

The information set forth in the Offer to Purchase and in the related
Letter of Transmittal is incorporated herein by reference.

ITEM 12. EXHIBITS.

(a)(1) Offer to Purchase limited partnership units of Winthrop Growth
Investors 1 Limited Partnership, dated May 9, 2003.

(a)(2) Letter of Transmittal and related instructions, dated May 9,
2003 (included as Annex II to the Offer to Purchase attached
as Exhibit (a)(1) hereto).

(a)(3) Acknowledgement and Agreement, dated May 9, 2003.

(a)(4) Letter, dated May 9, 2003, from AIMCO Properties to the
limited partners of Winthrop Growth Investors 1 Limited
Partnership.

(a)(5) Annual Report of AIMCO Properties for the year ended December
31, 2002 filed with the Commission on Form 10-K on March 25,
2003 is incorporated herein by reference.

(b)(1) Fifth Amended and Restated Credit Agreement, dated as of
February 14, 2003, by and among AIMCO, AIMCO Properties,
AIMCO/Bethesda Holdings, Inc., NHP Management Company, Bank of
America, N.A., and each lender from time to time party thereto
(Exhibit 10.35.2 to AIMCO's Annual Report on Form 10-K for the
fiscal year ended December 31, 2002 is incorporated herein by
reference).

(b)(2) Third Amendment, dated as of February 14, 2003, to the Interim
Credit Agreement, dated as of March 11, 2002, by and among
AIMCO Properties, NHP Management Company, AIMCO, Lehman
Commercial Paper, Inc., Lehman Brothers, Inc., and each lender
from time to time party thereto (Exhibit 10.38.2 to AIMCO's
Annual Report on Form 10-K for the fiscal year ended December
31, 2002 is incorporated herein by reference).

(b)(3) Second Amendment, dated as of August 2, 2002, to the Interim
Credit Agreement, dated as of March 11, 2002, by and among
AIMCO Properties, NHP Management Company, AIMCO, Lehman
Commercial Paper Inc., Lehman Brothers Inc., and each lender
from time to time party thereto (Exhibit 10.3 to AIMCO's
Quarterly Report on Form 10-Q for the quarterly period ended
June 30, 2002 is incorporated herein by reference).

(b)(4) Interim Credit Agreement, dated as of March 11, 2002, by and
among AIMCO, AIMCO Properties, NHP Management Company, Lehman
Commercial Paper, Inc., and the other financial institutions
party thereto (Exhibit 10.32 to AIMCO's Annual Report on Form
10-K for the year ended December 31, 2001, is incorporated
herein by reference).

(d) Not applicable.

(g) None.

(h) None.

ITEM 13. INFORMATION REQUIRED BY SCHEDULE 13E-3.

Not applicable.

SIGNATURE

After due inquiry and to the best of its knowledge and belief, the
undersigned hereby certifies that the information set forth in this statement is
true, complete and correct.

Dated: May 9, 2003
AIMCO PROPERTIES, L.P.

By: AIMCO-GP, INC.
-----------------------------
(General Partner)

By: /s/ Patrick J. Foye
-----------------------------
Executive Vice President

EXHIBIT INDEX

EXHIBIT NO. DESCRIPTION
- ----------- -----------

(a)(1) Offer to Purchase limited partnership units of
Winthrop Growth Investors 1 Limited Partnership,
dated May 9, 2003.

(a)(2) Letter of Transmittal and related instructions, dated
May 9, 2003 (included as Annex II to the Offer to
Purchase attached as Exhibit (a)(1) hereto).

(a)(3) Acknowledgement and Agreement, dated May 9, 2003.

(a)(4) Letter, dated May 9, 2003, from AIMCO Properties to
the limited partners of Winthrop Growth Investors 1
Limited Partnership.

(a)(5) Annual Report of AIMCO Properties for the year ended
December 31, 2002 filed on Form 10-K on March 25,
2003 is incorporated herein by reference.

(b)(1) Fifth Amended and Restated Credit Agreement, dated as
of February 14, 2003, by and among AIMCO, AIMCO
Properties, AIMCO/Bethesda Holdings, Inc., NHP
Management Company, Bank of America, N.A., and each
lender from time to time party thereto (Exhibit
10.35.2 to AIMCO's Annual Report on Form 10-K for the
fiscal year ended December 31, 2002 is incorporated
herein by reference).

(b)(2) Third Amendment, dated as of February 14, 2003, to
the Interim Credit Agreement, dated as of March 11,
2002, by and among AIMCO Properties, NHP Management
Company, AIMCO, Lehman Commercial Paper, Inc., Lehman
Brothers, Inc., and each lender from time to time
party thereto (Exhibit 10.38.2 to AIMCO's Annual
Report on Form 10-K for the fiscal year ended
December 31, 2002 is incorporated herein by
reference).

(b)(3) Second Amendment, dated as of August 2, 2002, to the
Interim Credit Agreement, dated as of March 11, 2002,
by and among AIMCO Properties, NHP Management
Company, AIMCO, Lehman Commercial Paper Inc., Lehman
Brothers Inc., and each lender from time to time
party thereto (Exhibit 10.3 to AIMCO's Quarterly
Report on Form 10-Q for the quarterly period ended
June 30, 2002 is incorporated herein by reference).

(b)(4) Interim Credit Agreement, dated as of March 11, 2002,
by and among AIMCO, AIMCO Properties, NHP Management
Company, Lehman Commercial Paper, Inc., and the other
financial institutions party thereto (Exhibit 10.32
to AIMCO's Annual Report on Form 10-K for the year
ended December 31, 2001, is incorporated herein by
reference).

(d) Not applicable.

(g) None.

(h) None.
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