At a point about 150 feet (46 m) south of Church Avenue, a clear difference in the form of the concrete retaining wall is visible on both sides of the right-of-way.

On August 1, 1920, a tunnel under Flatbush Avenue opened, connecting the Brighton Line to the Broadway subway in Manhattan.

[9] In November 2022, the MTA announced that it would award a $965 million contract for the installation of 21 elevators across eight stations,[10] including Church Avenue.

[14] Church Avenue is an open-cut express station with short tunnels at each end to carry the line between cross streets.

[17] The full-time entrance is at the north end of the station by Caton Avenue and St. Pauls Place, and the stationhouse there retains the original c.1918 exterior.

This end of the station originally had a part-time booth during the morning rush; a high-exit turnstile was open at all other times.

Before the station was renovated for ADA-accessibility in the mid-2020s, the southbound platform had an abandoned exit to East 18th Street between Church and Caton Avenues.