Classon Avenue station

New York City Subway station in Brooklyn
Under the 2015–2019 Metropolitan Transportation Authority Capital Plan, this station, along with 32 others, was to have undergone a complete overhaul as part of the Enhanced Station Initiative. Updates would have included cellular service, Wi Fi, USB charging stations, interactive service advisories and maps, and improved signage and station lighting. However, most of these renovations are being deferred until the 2020–2024 Capital Program due to a lack of funding. In 2019, the MTA announced that this station would become ADA accessible as part of the agency's 2020–2024 Capital Program. A contract for three elevators at the station was awarded in December 2023.

This underground station has two side platforms and two tracks with space for a center track. The G stops at the station at all times. The station is between Bedford–Nostrand Avenues to the north and Clinton–Washington Avenues to the south. Both platforms have a light green trim line with a dark green border and name tablets reading "CLASSON AVE." in white sans serif lettering on a dark green background and light green border. Small "CLASSON" tile captions and directional signs in white lettering on a black background run below the trim line and name tablets. The tiles were part of a color coded tile system used throughout the IND. The tile colors were designed to facilitate navigation for travelers going away from Lower Manhattan. Because the Crosstown Line does not merge into a line that enters Manhattan at either end, all stations on the line had green tiles. Hunter green (previously dark 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 space for an additional center track between the two outer ones was meant for the unbuilt IND Second System. It would have been an extension of the center track at Bedford–Nostrand Avenues, which dead ends on either side of that station. Railroad south of Classon Avenue, the two tracks curve closer to each other and the center trackway ends. The south end of the southbound platform and the north end of the northbound one have room for proposed control towers. Those spaces are now used for crew facilities.

This station has a full length mezzanine above the platforms and tracks supported by dark green i beam columns, but only the northern half is open to the public and has two staircases to each platform. The fare control area is at the center with a turnstile bank, token booth, and three stairs going up to all corners of Classon and Lafayette Avenues except the northeast one.