[3][4] The route of the Concourse Line was approved to Bedford Park Boulevard on June 12, 1925, by the New York City Board of Transportation.

Orange-yellow I-beam columns run along both platforms and the full-time mezzanine at regular intervals with alternating ones having the standard black station name plate with white lettering.

On the Manhattan-bound side, a set of regular and High Entry/Exit Turnstiles lead to a mezzanine area, where two staircases go up to either western corners of East 170th Street and Grand Concourse.

[11] The fare control area on the Norwood-bound side is exit only,[12] containing two high turnstiles and one staircase going up to the southwest corner of East 170th Street and Grand Concourse.

On both sides of the platforms at the southern end, there were staircases that led down to the East 170th Street underpass;[14][15] they were closed off to the public for security reasons in 1992.