It was made to serve Tunbridge Wells West and its connecting lines and is now the main depot and station of the Spa Valley Railway.

The depot originally opened in 1866 by the London, Brighton & South Coast Railway with two roads which could hold six locomotives south of the station.

By 1891, the depot was replaced by a larger four road shed north of the station.

Following bomb damage on 20th November 1940 during World War 2, the original slate roof of the shed was replaced with corrugated asbestos.

In the 1990s, The Tunbridge Wells & Eridge Railway Preservation Society would get ownership of the depot from Sainsburys (who were building a supermarket on the old land of the station).