The station was designed by Charles Holden in a modern European style using brick, glass and reinforced concrete. Compared with the other new stations Holden designed for the extension, Cockfosters' street buildings are modest in scale, lacking the mass of Oakwood or Arnos Grove or the avant-garde flourish of Southgate. Holden's early design sketches show the station with two towers. The most striking feature of the station is the tall concrete and glass trainshed roof and platform canopies, which are supported by portal frames of narrow blade-like concrete columns and beams rising from the platforms and spanning across the tracks. The trainshed roof constructed at Uxbridge from 1937 to 1938 was built to a similar design. Cockfosters station is a Grade II listed building.