In the summer of 1917, Ekebergbanen constructed a depot at Holtet with six tracks to store twelve trams. It had a converter station and a workshop, but also served as an administration building.[2] In 1919, it was expanded to accommodate a forge, a machine workshop and a painting workshop. In 1942, a new depot was built, which could store eight trams. Between 1951 and 1952, it was expanded once again.[3]