The station was built just north of Denham village as part of the Great Western and Great Central Joint Railway. Its original name was Denham — Junction for Uxbridge as it was a stop on the shuttle service between and ; the latter station has long been closed and demolished, and the branch line to it dismantled. The original station layout had four roads: two for non-stop trains, and two with platforms for stopping services. There was a small goods yard north of the line, and a signal box at the London end of the "down" platform. The two through roads have been removed, being taken up in December 1965, with all services using the platform roads and has since had improved track alignments to allow fast running trains. The signal box closed on 15 June 1975. The former goods yard is now the stationcar park. The station was transferred from the Western Region of British Rail to the London Midland Region on 24 March 1974.
Under the London Passenger Transport Board's 1935-40 New Works Programme, Denham was to have been the terminus of the Central line's westward extension, with Central line platforms south of those on the main line. Work on the extension was postponed in World War II. The introduction of the Metropolitan Green Belt limited the expansion of the London urban area and the extension was cut back to West Ruislip. No visible signs of the extension works remain at Denham.
Development
The station was built with a pedestrian underpass linking the platforms, but this was inaccessible to people with impaired mobility. Further, the embankment supporting the "down" platform and buildings was subsiding, so the "down" platform has been relocated as an island north of the "down" road, in the gap left by the removal of the original through roads, and to provide a footbridge and lifts, similar to those at Gerrards Cross, for disabled access. The new "down" platform was opened for use in late July 2008, and the original "down" platform and buildings have been removed. A proposed second phase, providing a third reversible track between the rear of the new platform and the existing "up" platform road, would improve operational flexibility by allowing stopping services to be passed by following non-stop trains.
Services
The typical Monday - Friday off-peak service consists of:
1 train per hour to
1 train per hour to
Cultural Use
In New Tricks series 9 episode "Queen and Country" Denham station was the location used for an unspecified station in Exeter.
