The Chambers Street subway station, served by the , consists of two levels below the building: the mezzanine (shared with the Brooklyn Bridge–City Hall station, served by the ) and the platform level. The station opened in 1913, and was intended as the Brooklyn Rapid Transit Company's main subway terminal in Manhattan, but fell into disrepair after businesses moved uptown in the 1930s. When the Municipal Building was completed, there were also supposed to be new station buildings for the adjacent elevated IRT and BRT stations, designed in the same architectural style. The tracks from the Chambers Street station would have also connected directly to the elevated tracks on the Brooklyn Bridge, but the connection was never opened.