161 East 90th Street

The building is a nine-story masonry pre-war designed by Warren & Wetmore — dignified, solidly built, composed in the firm's confident classical manner. Its institutional origins gave it deep floor plates and robust construction, qualities that the 1979 residential conversion turned to the apartments' advantage.

The 27 residences are the product of that conversion, laid out to take advantage of the building's generous footprint, with the high ceilings and good light that the original structure allowed. Layouts span a range from well-scaled one- and two-bedroom homes to larger configurations, and condition varies from earlier-conversion-era finishes to fully modernized renovations — a spread that creates both value entry points and turnkey premiums. The building's amenity package, unusual for its scale, sets it apart from the typical mid-block pre-war.

Trafalgar Court runs as a well-amenitized boutique cooperative. The standout features are a common roof deck and common outdoor space — genuinely scarce on the Carnegie Hill side streets — alongside a bike room, an elevator, and storage. That amenity set, combined with the building's pet-friendly posture, gives residents the kind of shared outdoor and lifestyle features usually reserved for larger buildings, while keeping the scale intimate at 27 homes.

Purchases are subject to cooperative board review and a financing posture consistent with Carnegie Hill's norms, with subletting governed by board policy. The building is pet-friendly. The mix of Warren & Wetmore provenance, real outdoor amenity, and a moderate carrying cost is the core of Trafalgar Court's appeal.

Recent sales

Recent transfers at this building, curated by The Roebling Team research desk. Apartment-level facts are independently verified before publishing; sale prices reflect the recorded transfer amount at the NYC Department of Finance.

Market read. Most recent trades (2025) cleared a median $806/sf across 1 sale. Median listing discount 3.8% 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 1-01519-0025) and verified listing data. Apartment-level facts (line, condition, asking-price context) curated and cross-verified by The Roebling Team research desk. 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 board-approval cooperative, so prepare a complete application and an interview. The reward is distinctive: a Warren & Wetmore building with a real roof deck and outdoor space, in a quiet Carnegie Hill location, at a moderate cost basis. Because the apartments came from a conversion, layouts and condition vary widely — weigh floor, light, and renovation scope carefully, and look closely at the specifics of each home rather than assuming a uniform product. The location puts the 4/5/6 at 86th, the Q at 86th and Second, Central Park, and the Museum Mile within easy reach. We help buyers read the financials, benchmark the price, and present a clean board package.

The selling story is unusual and marketable: a 1923 Warren & Wetmore building reborn as a cooperative, with a roof deck and outdoor space few neighbors can match, on a quiet Carnegie Hill block. Lead with the architectural provenance and the amenity package — both differentiate a listing here from the surrounding mid-block pre-wars — and present the specific apartment's light, layout, and renovation level clearly. Pricing belongs against the boutique Carnegie Hill cooperatives, with credit for the building's outdoor amenity. We position each home to the buyer the building attracts and manage the board timeline so the deal closes cleanly.

If you're considering Trafalgar Court, also evaluate these nearby pre-war cooperatives:

• 14 East 90th Street — pre-war cooperative near Fifth
• 114 East 90th Street — neighboring Carnegie Hill cooperative
• 161 East 91st Street — pre-war cooperative one block north
• 15 East 91st Street — Carnegie Hill pre-war cooperative
• 131 East 93rd Street — nearby pre-war cooperative
• 45 East 89th Street — Carnegie Hill cooperative to the south

The Roebling Team at Compass specializes in Carnegie Hill and the Upper East Side's cooperatives — including the distinctive conversions and provenance buildings where architecture, amenity, and block quality decide value. We publish this profile because buyers and sellers at a building like Trafalgar Court deserve building-specific intelligence, not a generic listing recap. If you're considering a purchase or sale here, a focused consultation is the right first step.