The area around Hornsey railway station in Hornsey (London Borough of Haringey) has been the site of several railway maintenance facilities from the mid 19th century onwards.
Initial developments included two road engine sheds, built east of the station (1866) and north of the station. In 1899 a substantial eight road engine shed was built east of the station.
In c.1973 an electric multiple unit maintenance depot was constructed as part of the electrification of the Great Northern rail route.
A separate maintenance facility is under construction on the site of the old Coronation sidings for Class 700 units of the .
A two road dead ended shed was established by the Great Northern Railway (GNR) in 1850, on the east side of the station. The shed closed in 1866 when the nearby Wood Green shed had been built, and was later demolished; making way for expansion of Hornsey station.
In 1866 another two road dead ended shed was established ("Wood Green shed"), ~1 km north of the station on the west side of the track adjacent to a new water works, and west of Wood Green common. The shed closed in 1899.
In 1899 an 8 track shed was constructed to the east of Hornsey station, together with a 52 ft (16 m) turntable, coal stage and water tank; the shed was connected via the Ferme Park sidings. The shed provided locos for shunting in the yard and nearby Ferme Park sidings, as well as goods workings across London to the south via Snow Hill tunnel. Hornsey locos shared suburban duties over the southern end of the GNR with locos from Kings Cross Top Shed.
Under British Railways the facility received the shed code 34B. The depot's initial allocation was primarily GNR Class N1s, GNR Class N2s and GNR Class J13s.
With the passing of steam, in 1961 the shed was converted for use with diesel traction, and continued in use until the early 1970s, closing in May 1971. The shed's duties were passed to nearby Finsbury Park diesel depot.