506 East 74 Street

Owner: Hospital For Special Surgery

Acquired: January 11, 2021, $42 million

Built: 1910

SF: 34,375

Dwelling units: 0

No. of buildings: 1

Class: Office with Comm — 1 to 6 stories (O5)

Floors: 5

Transactions:

• Haug Realty Corp. sold 506 East 74th Street, the Upper East Side, Manhattan for $42 million to Hospital for Special Surgery on January 11, 2021.

Development:

• David Franco filed plans for alteration in Lenox Hill, Manhattan, on July 24, 2025.

• Jay Kreisberg filed plans for alteration in Lenox Hill, Manhattan, on March 21, 2019.

• Hedi White filed plans for alteration in Lenox Hill, Manhattan, on May 24, 2001.

• Jay Kreisberg filed plans for alteration in Lenox Hill, Manhattan, on December 12, 2019.

• Hedi White filed plans for A3 in Lenox Hill, Manhattan, on July 30, 2009.