The 16-story apartment building at 865 United Nations Plaza on the northwest corner at 48th Street and First Avenue is being converted to condominiums.
It was built in 1927 with 81 apartments and is directly across the avenue from the twin-towers of 860 and 870 United Nations Plaza and it is directly across 48th Street from the Trump World apartment tower.
The building has five apartments on most of the floors ranging in size from 559-square-foot studio units to 948-square-foot one-bedroom apartments.
According to documents on file with the Department of Buildings, Melzter Costa Architects of Great Neck, L.I., is the architect for the conversion and the building has a permit for 64 units.
Samson Management of Queens, NY, of which David Kershner is a principal, is the converter.
There are fireplaces in apartments on the 14th through the 16th floors.
Available apartments are priced from about $795,000 to $1,025,000.
The building overlooks the exit from the First Avenue tunnel and the north end of the United Nations compound and park along the East River.
It was built in 1927 with 81 apartments and is directly across the avenue from the twin-towers of 860 and 870 United Nations Plaza and it is directly across 48th Street from the Trump World apartment tower.
The building has five apartments on most of the floors ranging in size from 559-square-foot studio units to 948-square-foot one-bedroom apartments.
According to documents on file with the Department of Buildings, Melzter Costa Architects of Great Neck, L.I., is the architect for the conversion and the building has a permit for 64 units.
Samson Management of Queens, NY, of which David Kershner is a principal, is the converter.
There are fireplaces in apartments on the 14th through the 16th floors.
Available apartments are priced from about $795,000 to $1,025,000.
The building overlooks the exit from the First Avenue tunnel and the north end of the United Nations compound and park along the East River.
Related Articles
Future New York
New York’s Classical Revival: See the new Penn Station and traditional designs reshaping the luxury residential market
Wednesday, June 24, 2026
Great Listings
Tudor City at 100: Rich history and attractive listings from $309K at Turtle Bay city-within-a-city
Wednesday, June 24, 2026
Future New York
Price Cuts: "Big" screenwriter's Cobble Hill townhouse trimmed by $900K; Lantern House junior penthouse drops below $10M
Wednesday, June 24, 2026
Future New York
Landmarks praises residential conversion/restoration of NoMad's Baudouine Building, Seeks revisions to rooftop addition
Tuesday, June 23, 2026
Iconic Addresses
Paul Newman's parkside office sells 47% over ask; Pre-war condo conversions lead Manhattan sales
Tuesday, June 23, 2026
Get To Know
What is a sponsor unit? Pros, cons, and NYC apartments with no board approval required from $165K
Tuesday, June 23, 2026
Future New York
NYC contracts led by $18.5M Upper East Side mansion and a bespoke Billionaires' Row condo
Tuesday, June 23, 2026
Get To Know
How property values are assessed in NYC + Great new listings with open houses from $445K
Saturday, June 20, 2026
Architecture Critic
Carter Horsley
Since 1997, Carter B. Horsley has been the editorial director of CityRealty. He began his journalistic career at The New York Times in 1961 where he spent 26 years as a reporter specializing in real estate & architectural news. In 1987, he became the architecture critic and real estate editor of The New York Post.
6sqft delivers the latest on real estate, architecture, and design, straight from New York City.
