Four fire engines and around 25 firefighters tackled a fire at a derelict school on Petersham Road in Richmond.
Part of the roof a single-storey, unused school building was damaged by fire. There were no reports of any injuries.
The Brigade was called at 1720 and the fire was under control by 1831. Fire crews from Kingston, Twickenham, Richmond and Surbiton fire stations attended the scene.
The cause of the fire is under investigation.