10 East 85th Street

10 East 85th Street is a classic mid-1920s masonry apartment house, designed in the restrained Renaissance Revival manner that suited the museum-district side streets — a defined base, a quiet brick midsection, and modest cornice detailing, scaled to hold the streetwall between Fifth and Madison. At nine stories and roughly 54,700 square feet of building area across 36 apartments, the building works out to about 1,500 gross square feet per apartment. That is gross building area divided by unit count, not average apartment size: it includes walls, halls and service space. Compare individual layouts and documented apartment measurements.

The apartment mix runs from well-proportioned one- and two-bedrooms to larger three-bedroom homes, many retaining the pre-war features buyers seek: high ceilings, hardwood floors, separate dining rooms and foyers in the larger lines, and deep, well-zoned floor plans. Renovation condition varies after a century of ownership — the building offers both turnkey homes and apartments with renovation upside. The building was substantially renovated and updated in the late 1980s, modernizing systems while preserving the pre-war fabric.

The cooperative is 100% shareholder-owned and run with a part-time doorman, a live-in superintendent, and porters and handymen on staff — a staffing model that delivers attentive service and security while keeping monthly maintenance efficient for a 36-unit building. Central laundry and private storage serve residents. The building permits financing up to 50% of the purchase price and allows pets with board approval; in-unit washer/dryer installations are permitted subject to board approval, a meaningful convenience in a pre-war building. A transfer fee (flip tax) applies on resale.

At 36 apartments across nine floors, this is a mid-sized cooperative. Buyers should review the building's financials, reserve fund, and any planned capital projects through the board-package process.

Recent sales

Recent transfers at this building, from The Roebling Research Library. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.

Market read. Most recent trades (2023) cleared a median $1,739/sf (floor-adjusted) across 1 sale. Floor-adjusted means each sale is restated to a constant mix of floors, so the figure can differ from the plain median of the sales listed above. Median listing discount 0.4% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01496-0065). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage on co-ops is not officially recorded, figures shown are approximate.

This is a co-op, so the purchase runs through a board application and interview, with the financial review that accompanies it — clean financials and sensible post-closing reserves matter. The building permits up to 50% financing and allows pets and in-unit washer/dryers with board approval. A flip tax applies on resale, and subletting is not permitted; confirm the current financing, liquidity and occupancy requirements from the governing documents and application instructions. The value case is compelling: pre-war space on the museum block, half a block from Central Park, at a price below the Fifth Avenue frontage buildings — in exchange for the board process and a part-time (rather than 24-hour) doorman.

The selling case is location, location, and pre-war fundamentals: a museum-block address between Fifth and Madison, half a block from Central Park, in a 100% shareholder-owned building with full staff and 50% financing flexibility. Renovated, higher-floor apartments show best and support top pricing; original-condition units should be positioned to buyers seeking value and renovation upside. With limited turnover, anchoring to the right comparable set — prime Carnegie Hill side-street co-ops rather than avenue or post-war buildings — drives accurate pricing. We qualify buyers for financial and board readiness early to protect the deal through the application.

If you're evaluating 10 East 85th Street, these nearby Carnegie Hill and Upper East Side pre-war cooperatives form a useful comparison set:

• 35 East 85th Street — pre-war co-op on the same block corridor
• 111 East 85th Street — a postwar cooperative on the same street
• 205 East 85th Street — a modern condominium nearby, for a tenure contrast
• 21 East 79th Street — Art Deco full-floor cooperative near the museum block
• 136 East 79th Street — pre-war Upper East Side co-op