Shimon Kleinman
Co-founder, Borough Developers
Affiliation
Affiliation source: Commercial Observer, "Borough Developers Closes on $84M Sale of Downtown Brooklyn Development Site," 2026-09-17
Overview
Shimon Kleinman is a co-founder of Borough Developers, a Williamsburg-based Brooklyn development firm. He is named personally in trade coverage of two ground-up Brooklyn residential projects: the firm's $83.5 million acquisition of the 485 Fulton Street assemblage in Downtown Brooklyn in September 2026, where he filed the DOB application for a trio of 99-unit buildings a month before the closing; and the 67-75 Fourth Avenue assemblage in Park Slope, which he bought from Tolib Mansurov in 2025 and filed as a 14-story, 99-unit building. Both filings used the same architect, Kao Hwa Lee Architects.
Source: Commercial Observer
Transactions Tracked
| Date | Transaction | Type | Neighborhood | Role | Amount |
|---|---|---|---|---|---|
| Sep. 2026 |
485 Fulton Street Acquisition (Sep. 2026)
BasisNamed personally in press coverage of this closing -- Commercial Observer and The Real Deal both frame the purchase as Shimon Kleinman's, and Commercial Observer reports that he filed the DOB plans for the site in August 2026. The ACRIS deed names the corporate grantee (Four Eighty Five LLC / 485 Fulton Family Holdings LLC), not Kleinman personally. |
Acquisition | Downtown Brooklyn | buyer (principal) | $83.5M |
| 67-75 Fourth Avenue + 77 St. Marks Place, Park Slope -- assemblage acquired from Tolib Mansurov (2025); 14-story, 99-unit building filed July 2025; demolition complete April 2026 — recorded on this profile but not published as a Deal, so it has no page to link to. | — | ||||
Scroll the table sideways for role and amount.
Related Properties
Sources
- Borough Developers Closes on $84M Sale of Downtown Brooklyn Development Site — Commercial Observer
- Housing Filed for Downtown Brooklyn Site Near Macy's — Commercial Observer
- Alleged straw donor to Adams sells Park Slope assemblage for $24M — Crain's New York Business
- Borough Developers buys site for trio of 99-unit DoBro buildings — The Real Deal
The 485 Fulton Street acquisition, the one transaction on which Shimon Kleinman is personally named. The figure is the transaction's full size. The Park Slope purchase from Tolib Mansurov adds nothing: the $24 million Crain's reports covers a wider set of Mansurov's holdings than this site.