Two United Nations Plaza

323 East 44th Street | also 330 East 45th Street, 2 United Nations Plaza | Turtle Bay | built 1984

The city photographed every building for its tax records around 1940 and again in the 1980s. NYC Municipal Archives.

Written with AI from the source each entry cites, then fact-checked.

1983
Kevin Roche and John Dinkeloo's tower opens as the second phase of UN Plaza
Roche-Dinkeloo designs Two United Nations Plaza as the second phase of the United Nations Development Corporation's plan, built from 1979 to 1983 at a cost of $69.5 million. The 505-foot slab holds offices on its lower floors and part of the hotel above, and mirrors One UN Plaza next door. Today the hotel is the Millennium Hilton New York One UN Plaza.
Source: Wikipedia
2017
January 17
The city landmarks the building's lobby and Ambassador Grill
On January 17, 2017, the Landmarks Preservation Commission designates the first-floor interiors of the hotel at Two United Nations Plaza, the lobby and the Ambassador Grill restaurant, as a New York City landmark.
Source: Wikipedia
2025
February
A $500 million renovation of One and Two UN Plaza is announced
In February 2025 the United Nations Development Corporation and the city and state governments announce a $500 million renovation of One and Two United Nations Plaza. The design work by Spacesmith covers about 900,000 square feet across both buildings.
Source: Wikipedia

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