The property was formerly owned by Teen Challenge, a Christian organization that provides residential treatment of drug and alcohol addiction.
It will have affordable housing as well as market rate apartments, office and retail space.
The buildings are part of Hudson Companies' controversial redevelopment of the Cadman Plaza Library in Brooklyn Heights.
The building’s existence is part of a controversial plan to lease NYCHA land to developers in exchange for cash to make repairs and build more apartments.
Of the affordable apartments, there are five studios, six one-bedroom units and 12 two-bedroom units.
Construction has reached about the fifth floor of a nine-story building with 37 affordable apartments on Fulton Street.
The building stands on NYCHA land occupied by the Raymond V. Ingersoll Houses, across from the northwest corner of Fort Greene Park.
More than a year after breaking ground, the 36-story luxury condo on the former site of Brooklyn Public Library’s Brooklyn Heights branch has reached a third of its future height.
The developers of the Bedford-Union Armory in Crown Heights have filed plans for a second rental building at the site.
It will have 88 rental apartments, and 20 percent of them will be affordable.