The depot is situated on a spur off the South West Main Line and is to the east of Branksome station.

The line between Bournemouth West Junction and Gas Works Junction (the eastern leg of the Branksome triangle) was closed and lifted, and the carriage sidings were converted into a depot for the new electric multiple units.

The carriage washing plant that had been installed in 1956 was retained, along with a long headshunt to the west for access.

[3] Bournemouth West Junction Signal Box was retained, but downgraded to the status of a groundframe.

In 1986 the inspection shed was modified with a two-track extension to accommodate the upcoming Class 442 units.