Halsey Street opened on July 14, 1928, as part of an extension of the Canarsie Line. This extension connected Montrose Avenue, which had opened four years earlier, to Broadway Junction, which was the western end of the already-operating elevated line to Canarsie.
This station has two tracks and two side platforms. Since all intersections on this section of Wyckoff Avenue are T intersections, the platforms are offset, with the Manhattan-bound platform built about further to the east than the Canarsie-bound one. Also, since the Brooklyn-Queens border travels on Wyckoff Avenue for part of the length of this station before turning south, the entire Manhattan-bound platform, as well as the eastern half of the Canarsie-bound platform, is located in Queens, although New York City Transit considers this station to be in Brooklyn. Both platforms have their original mosaic tile band that is colored blue and green with yellowish accents. "H" tablets on blue background run along the tile bands at regular intervals. The name tablets read "HALSEY ST." in gold serif font on a blue background and a green, yellow, and blue border. There are also directional signs in gold serif font and outline on a blue background. One of the platforms formerly had two bathrooms. Yellow i-beam columns run along both platforms at regular intervals with alternating ones having the standard black station name plate in white lettering.
Exits
All fare control areas at this station are platform level and there are no crossovers or crossunders. The full-time side is at the west end of the platforms. On the Manhattan-bound side, a turnstile bank leads to the full-time token booth and one staircasegoing up to the northwest corner of Wyckoff Avenue and George Street. On the Canarsie-bound side, a turnstile bank leads to a part-time customer assistance booth and one staircase going up to the southwest corner of Halsey Street and Wyckoff Avenue. Both platforms have an unstaffed fare control area at their east end. A set of full height turnstiles leads to a single street stair. The Manhattan-bound staircase goes up to the northeast corner of Norman Street and Wyckoff Avenue while the Canarsie-bound staircase goes up to the southwest corner of Covert Street and Wyckoff Avenue.