25 Water Street, also known as 4 New York Plaza, is a building at Water Street and Broad Street the Financial District of Manhattan in New York City, U.S. It directly adjoins both 125 Broad Street to the south, which is connected, and the Vietnam Veterans Plaza to the east. The building was completed in 1969 and operated as an office building from 1969 to 2022. As of 2023 it is being redeveloped into a residential building that is planned to have over 1,300 apartments, which would make it the largest office-to-residential property conversion in the United States.

Carson & Lundin, later known as Carson, Lundin & Shaw and Carson, Lundin & Thorson, was an American architectural firm based in New York City and active from 1941 until 1996. It was formed initially by the 1941 partnership between architects Robert Carson and Earl H. Lundin.