At a glance
- Firm: Rybak Development & Construction Corp.
- Founder & principal: Sergey Rybak (President & CEO)
- Founded: 2007 (Brooklyn, NY)
- Focus: Ground-up condominium development — historically South Brooklyn boutique, now full-floor Manhattan luxury and larger mixed-use projects
- Signature buildings in scope: 502 East 81st Street and 660 Lexington Avenue (656 Lexington)
- Source: The Roebling Team at Compass — verified against public records and published reporting. July 2026.
Who Rybak Development is
Rybak Development is the firm Sergey Rybak founded in 2007, starting with a small South Brooklyn condominium and building outward from there. The firm made its name on boutique ground-up condos in Brooklyn and has since moved up-market and into Manhattan with a specific product signature: intimate, full-floor luxury towers with marquee interior design. A recent competitive selection by NYCEDC to develop a large mixed-income project on Coney Island is a meaningful third-party vote of confidence in the platform's scale.
For a buyer, the read is a developer in an ambitious growth phase — moving from boutique Brooklyn work into the highest tier of Manhattan new development.
Buildings by Rybak Development
Rybak Development projects already profiled on this site:
- 502 East 81st Street — the ground-up Yorkville boutique condominium of roughly ten full-floor homes, with Zproekt Architecture and S20M as design architect
- 656 Lexington Avenue (660 Lexington Avenue) — the new Midtown East condominium of 31 residences with interiors by Paris Forino, on a corner site Rybak assembled after acquiring it from the Biagi family in 2021
Reputation and what a buyer should know
No consumer-facing construction-defect litigation or pattern of buyer complaints surfaced against Rybak in the public record. The litigation that does appear is ordinary commercial activity for a busy developer — a subcontractor mechanic's-lien dispute on an older Brooklyn project and a lender-related suit tied to a project entity — both financial and contractual matters, not building-quality claims. Both Manhattan buildings in scope are new or near-complete, so there is no post-occupancy defect track record yet either way; given the firm's smaller size and rapid up-market move, that argues for measured diligence rather than alarm. Standard new-development steps apply: read the offering plan, benchmark the pricing, and confirm lien, title, and warranty terms before you sign.
The Roebling Team on Rybak Development buildings
We track the sponsors behind Manhattan's new-development inventory because a buyer of new construction is partly betting on the developer's execution and staying power. If you're evaluating a Rybak building — or weighing it against another sponsor's product — a 30-minute consultation is the right starting point.
Corey Cohen, Principal · The Roebling Team at Compass 646.939.7375 · c.cohen@compass.com
This developer profile reflects publicly available information — including NYC public records, court filings, and published reporting — and The Roebling Team's transaction experience. It is provided for research purposes and is not legal advice; nothing here alleges wrongdoing or building defects beyond what the cited public record supports. The Roebling Team at Compass does not represent Rybak Development. © 2026 The Roebling Team at Compass.