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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.

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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.