This underground station has two tracks and two side platforms. Both platforms have a lime green trim line on a darker green border and name tablets reading "FULTON ST" in white sans serif font on a dark green background and lime green border. Small black "FULTON" signs in white lettering run along the trim line at regular intervals and directional signs in the same style are below the name tablets. Blue i-beam columns run along both platforms at regular intervals with alternating ones having the standard black station name plate in white lettering. The station is very close to the Crosstown Line's junction with the IND Fulton Street Line just west of Lafayette Avenue, although the two stations do not have an in-system transfer. Riders on Manhattan-bound A and C trains can catch a glimpse of this station's platforms through the right-side windows a few seconds after leaving Lafayette Avenue. There is an employee-only connection between the two stations via the tunnels. A proposed transfer to the busy Atlantic Avenue–Barclays Center complex was rejected by the MTA due to the long walking distance between the two stations.
Exits
The station's full-time fare control area is at the extreme south end of the Church Avenue-bound platform. A bank of turnstiles at platform level leads to a token booth and one staircase going up to the northeast corner of Lafayette Avenue and Fulton Street. A crossunder here connects to the Queens-bound platform. This station has a mezzanine above the platforms and tracks near the north end. However, most of it has been converted to employee-use only and the staircases leading up to it from the platforms are gated shut or sealed off. At the extreme north end of the station, a single open staircase from each platform goes up to a single full height turnstile before a staircase goes up to either western corner of South Portland and Lafayette Avenues, the northwestern one for the Queens-bound platform and the southwestern one for the Church Avenue-bound platform. These exits were closed in the mid-1980s due to concerns over maintenance expense and potential crime, but the southwestern corner entrance was reopened in July 2005 following community pressure, while the northwestern corner entrance was reopened some time between January and June 2009.
