At a glance
Firm: Ekstein Development Group (also "Ekstein Development") Founder & principal: Erik Ekstein (President & CEO) Founded: Not publicly documented; the firm predates 2007 Headquarters: New York, NY (privately held) Focus: Boutique, ground-up Manhattan condominium development, executed by an unusually vertically integrated operation — Ekstein controls in-house construction companies that build most of its projects Recurring design partners: Morris Adjmi Architects; GF55 Partners Related businesses: Beyond development, Erik Ekstein controls self-storage, construction, and recreation (ice arenas, rehearsal studios) companies across the tri-state area — a diversified operation of which for-sale condos are one part Signature reputation: A small, design-conscious developer of architecturally distinctive infill condominiums; a clean building-quality record, with the only real disputes being commercial partnership matters rather than construction defects Source: The Roebling Team at Compass — verified against public records, court filings, and published reporting. July 2026.
Who Ekstein Development is
Ekstein Development is the boutique New York development firm led by Erik Ekstein, its founder, president, and CEO. (Trade press occasionally renders the name as "Eric" or "Eckstein"; the correct form is Erik Ekstein.) The firm is privately held, and — unusually among the developers profiled on this site — it does not publish a founding date or a corporate headquarters address; what the public record establishes is that the firm has been operating since at least the mid-2000s, and that Ekstein himself sits atop a diversified operating company that extends well beyond residential development.
That breadth is worth understanding, because it shapes how the firm builds. Alongside development, Erik Ekstein controls self-storage businesses, two in-house construction companies (E&T Skyline Construction and TyJor Construction), and recreation assets including ice arenas and rehearsal studios — holding interests, by the firm's own account, in more than three million square feet of property across residential, industrial, office, and storage uses. For a condo buyer, the salient fact is the vertical integration: Ekstein's own construction firms build the majority of its projects, which gives the developer direct control over the work — and puts the quality of the finished product squarely on the house.
What they build
Ekstein's signature is the architecturally distinctive infill condominium — a small, design-forward building on a tight Manhattan site, usually ground-up, usually delivered through the firm's own construction arm. The portfolio is boutique by design: a handful of named condominiums rather than a large pipeline, concentrated in NoMad/Rose Hill, West Chelsea, the Upper West Side, and Long Island City. The firm repeatedly hires serious designers — Morris Adjmi Architects and GF55 Partners among them — and lets the architecture carry the building, which is why its projects tend to read as considered rather than generic.
Because the firm is small and vertically integrated, sponsorship and construction are closely held: a buyer is dealing with a developer that both builds and often finances its work, sometimes in joint venture with a capital partner. That structure has produced clean construction outcomes to date — and, on one project, a commercial dispute with a financing partner, covered below.
Buildings by Ekstein Development
Ekstein Development projects already profiled on this site:
- 30E31 (30 East 31st Street) — the Morris Adjmi-designed NoMad/Rose Hill tower with, on most floors, a single full-floor residence per floor; a Neo-Gothic/Art Deco envelope on a slender midblock site. Developed by Ekstein in partnership with the Pinnacle Group
- 540 West 28th Street (+Art) — the 2010 West Chelsea condominium on the gallery district's "architects' block," designed with GF55 Partners (Leonard Fusco), developed by Ekstein with L&M Development Partners and RD Management
Other Ekstein work includes The Dutch (25-19 43rd Avenue, Long Island City), an 86-unit GF55-designed condominium completed in the late 2010s. Across these projects the firm's role is that of an active developer — lead sponsor at 30E31 (through a joint venture with Pinnacle) and a co-developer at 540 West 28th (with L&M and RD Management).
Track record
Ekstein's record is that of a small developer that ships architecturally serious buildings. At 540 West 28th Street, the firm delivered a 91-unit design-forward condominium on one of Chelsea's most architecturally competitive blocks — next to Zaha Hadid's 520 West 28th — and did so in partnership with two established firms. At 30E31, Ekstein and its partner built a slender, one-home-per-floor NoMad tower that stands out as one of the more distinctive additions to that skyline.
The market has not always rewarded the ambition instantly. At 30E31, published reporting indicates the sellout target was raised over the course of the project and that some units, including the penthouse, were repriced downward as sales met the market — a demand story, not a quality story, but one a buyer weighing new-development pricing should note. That project also produced a partnership dispute (below) that a buyer should understand for what it is — and is not.
Reputation and what a buyer should know
On the question that matters most to a condo buyer — is the building well built — Ekstein's record is clean. Across 30E31, 540 West 28th Street, and The Dutch, we found no condo-board construction-defect litigation, no facade-failure or water-intrusion reporting, and no substantive building-safety violation record tied to the developer. On construction quality, the public record does not surface a red flag — and given that Ekstein's own construction companies build the work, the developer owns that outcome directly.
The disputes that do appear are commercial, not quality-related, and should be read that way:
- A partnership dispute at 30E31. The 30 East 31st Street project was developed through a joint venture in which the Pinnacle Group held the majority interest and Ekstein a minority stake. After the venture took on project financing and later fell into default on the remaining balance, Pinnacle sued Ekstein in New York County in 2023 over the terms of a partition/buyout of unsold units — essentially a fight between partners about ownership of remaining inventory and enforcement of an agreement. Ekstein disputed that a final deal had been reached. This is a partnership and financing dispute over unsold units, not a construction-defect or building-quality matter, and it does not bear on the physical condition of the residences.
- A neighbor-access dispute. In an earlier matter, Ekstein was the plaintiff, seeking access to an adjacent property to install city-required protective measures during construction — a routine construction-logistics dispute that reflects a project delay, not a defect.
A buyer may also encounter a 2025 federal case captioned Rabinowitz v. Ekstein in the record. We were not able to confirm the nature of that matter from public sources; given that the firm's leadership includes an individual of that surname, it may be an internal or partnership matter rather than a building-quality claim — but we flag it here as unverified rather than characterize it, and a buyer's counsel can confirm the docket if it is relevant to a specific building.
For a buyer, standard new-development diligence applies with no sponsor-specific red flag on quality: read the offering plan, confirm lien and title status, review the warranty and punch list. Given the boutique scale and the repricing history at 30E31, study the current sponsor-inventory position and recent comps in the specific building before you set your offer.
The Roebling Team on Ekstein Development buildings
We publish developer profiles because a buyer choosing a new-construction or recently-converted condominium is, in part, betting on the developer — its quality, its staying power, and its record when things go wrong. The Roebling Team at Compass tracks the sponsors behind Manhattan's luxury inventory building by building, and we bring that context to every new-development transaction: what the developer has built, how those buildings have held value, and what to verify before you sign.
If you're evaluating an Ekstein building — 30E31, +Art at 540 West 28th, or another — 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, and matters we could not verify are identified as such. The Roebling Team at Compass does not represent Ekstein Development. © 2026 The Roebling Team at Compass.