Ash Grove bus garage is a bus garage in Cambridge Heath in London Borough of Hackney, east London. It is located on the A107 Mare Street, where it crosses the Regent's Canal. The depot is occupied by two companies, CT Plus and Arriva London, and holds around 30 buses. Opened in 1981 by London Buses, it was closed in 1991 following the abandonment of the London Forest subsidiary, but reopened in 1994 by Kentish Bus. East Thames Buses have also used the site.
Ash Grove is one of three new garages opened in 1981 by London Buses at a cost of £3.5 million. It had space for 140 buses undercover and a further 30 in the yard. The roof was unusual in being carried by ten 35-ton triangular trusses, said to be the largest in the UK, supported on reinforced concrete columns. The garage assumed Hackney's operation of Red Arrow routes 502 and 513 using new Leyland Nationals which had been stored at the garage, and the entire Hackney and Dalston allocations. When London Buses was split into eleven separate companies Ash Grove became part of the London Forest operation, but closed in 1991 when London Forest was wound up.
The garage was re-opened in 1994 by Kentish Bus. This came about after then gained a small number of routes in the Leyton area, including former Boro'line route 108, although they referred to the garage as Cambridge Heath.