Architecturally, Tongham station was similar to Ash Green Halt in that the main station building was situated at street level on a road bridge crossing the line, with a covered staircase leading down to the Up platform. The station was equipped with two platforms, with several sidings to the east of the station as well as the line to the Gas Works which led off to the north-west from the Up line; a short siding also led into Hyde's dog biscuit factory situated to the west of the station.