The station provided first and second-class waiting rooms, a departure yard, a carriage shed and engine house.

[2][3] By 1839, the station is recorded in the Bucks Herald as having a corrugated iron roof, an engine shed and stationary pumping house with a tall chimney, and a footbridge.

[4] In its 21 years of operation it also served as a station for royalty; in the short period when the Dowager Queen Adelaide was resident at Cassiobury House (c. 1846–1849), this station was remodelled to provide her with a royal waiting room, and it was also reportedly used by Queen Victoria and Prince Albert on a trip to visit Sir Robert Peel in November 1843, when they travelled by road from Windsor Castle to take a train from Watford to Tamworth.

[6] The Grade-II-listed Old Station House still stands at 147A St Albans Road, a rare surviving example of architecture from the beginning of the railway age.

[7] As of 2021[update] it stands in the middle of the Watford Cross property development and plans have been announced to convert the building into a craft beer tap room.