At one time, there were four different railway routes from the northern end of Princes Risborough station, although there has only ever been one to the south.

The original building was extended at the north end to provide extra office accommodation between 1870 and 1880; a curved roof canopy covering the platform may have also been added at the same time.

[7][8] Central to this scheme was the upgrading of the existing GWR route between High Wycombe and Princes Risborough, which was transferred to the Joint Committee at its establishment on 1 August 1899.

The line was extended in a north-westerly direction to Ashendon Junction, at which point the joint line ended, and a GCR route ran northwards to Grendon Underwood Junction, just south of Calvert; both sections opened for goods on 20 November 1905 and for passengers on 2 April 1906.

[9][10] Continuing in the same north-westerly direction from Ashendon Junction, the Bicester cut-off line, which was purely GWR property, was opened for goods trains on 4 April 1910 and to passengers on 1 July 1910.

[11][12] The Watlington branch closed to passengers on 1 July 1957 and the route to Oxford via Thame closed on 7 January 1963;[3] services over the GCR route ceased on 5 September 1966,[10] this left the present network of two lines to the north to Banbury and to Aylesbury.

[14] It closed in 1991, when modernisation of the line moved signalling operations to Marylebone; it became a Grade II listed building after a successful public campaign to save it from demolition.

[18] Princes Risborough station currently has four platforms: The weekday off-peak service consists of two trains per hour eastbound to London Marylebone and two trains per hour westbound to Oxford, with occasional peak-time calls from services to Banbury and Birmingham Snow Hill.