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

[10] In April 1993, the New York State Legislature agreed to give the MTA $9.6 billion for capital improvements.

Some of the funds would be used to renovate nearly one hundred New York City Subway stations,[11][12] including Cortelyou Road.

[13] Between 1994 and 1996, the station was completely rebuilt with new turnstiles, waiting areas, stairways, and a new token booth.

[15][16] From February 21 to June 13, 2014, the southbound platform was closed as part of a $3.2 million component repair project, which included work at the Beverley Road and Parkside Avenue stations.

[21] The station house features artwork called Garden Stops by Patsy Norvell, which has etched images of leaves on the glass windows inside fare control facing the south.