AIMCO
                             AIMCO PROPERTIES, L.P.
                    c/o River Oaks Partnership Services, Inc.
                  P.O. Box 2065 S. Hackensack, N.J., 07606-2065
                                 (888) 349-2005

                                 August 20, 2002

                                OFFER TO PURCHASE
                          LIMITED PARTNERSHIP UNITS OF
                 WINTHROP GROWTH INVESTORS 1 LIMITED PARTNERSHIP
                          FOR $512.00 PER UNIT IN CASH


Dear Limited Partner:

        We have begun a tender offer to purchase limited partnership units of
your partnership for $512.00 per unit. Our offer is being made pursuant to the
enclosed Offer to Purchase, which sets forth all of the terms and conditions of
the offer. Please carefully review the Offer to Purchase prior to making a
decision whether or not to tender your interests. The offer is scheduled to
expire at midnight, New York City time, on September 17, 2002, unless otherwise
extended. You will not be required to pay any partnership transfer fees in
connection with any sale of your units pursuant to our offer.

        If we purchase your tendered units, you will receive cash, but you may
recognize a gain or loss for federal income tax purposes. If you retain your
units, you will continue to be a limited partner. However, you may not be able
to liquidate your investment until the partnership terminates.

        As with any investment decision, there are benefits and detriments to
you from accepting or declining our offer. The managing general partner of your
partnership, Two Winthrop Properties, Inc., is remaining neutral and makes no
recommendation as to whether you should tender or refrain from tendering your
units in any offer. The managing general partner believes that you must make
your own decision whether or not to participate in any offer, based upon a
number of factors described in the Offer to Purchase.

        The managing general partner of your partnership is our affiliate. As a
result, it has substantial conflicts of interest with respect to our offer. This
conflict may affect the managing general partner's ability to reconcile our
interests with those of the other limited partners, particularly in assessing
the fairness of our offer price. We seek to purchase units at a low price, but
you desire to sell units at a high price. In addition, your managing general
partner is entitled to receive fees for managing the partnership and for certain
transactions involving the partnership.





        If you desire to tender any of your units in response to our offer, you
should complete and sign the enclosed acknowledgment and agreement in accordance
with the instructions set forth in the letter of transmittal attached as Annex
II to the Offer to Purchase. The signed acknowledgment and agreement and any
other required documents should be sent to the Information Agent, River Oaks
Partnership Services, Inc., prior to the expiration of our offer. The addresses
for the Information Agent are P.O. Box 2065, South Hackensack, New Jersey
07606-2065 or by overnight courier service or by hand at 111 Commerce Road,
Carlstadt, New Jersey 07072 -- Attention: Reorganization Department.

        If you have any questions or require further information, please call
the Information Agent, toll free, at (888) 349-2005.


                                                     Very truly yours,


                                                     AIMCO PROPERTIES, L.P.