Downton station was 3 miles and 70 chains from Alderbury Junction and was located to the north of the eastern end of Downton High Street, the line crossing the road by way of a bridge. The station consisted of a passing loop with up and down platforms plus goods sidings. The main station building was a single storey pitched roof structure with mono-pitch canopy and was located on the up (north bound) platform. The signal box was a LSWR Type 1 box and was at the southern end of the down platform. The signal box was reduced to a ground frame when the station ceased to be a block post on 1 December 1922. A steel girder footbridge was installed in 1902; this was the first of its type on the LSWR. The station master's house was to the south east of the station, close to the signal box. Goods traffic was served with a cattle loading dock on the up side accessed by a lead to the north of the station and a small number of sidings for other goods, also on the up side, and served by a lead to the south of the station. After the station ceased to be a block post the down loop was converted to a siding with catch points installed at both ends. The station site today is a residential development with only the station master's house extant.