Six fire engines and around 40 firefighters tackled a fire on Park Road in Hampton Wick.
A single-storey sports pavilion was destroyed by fire. There were no reports of any injuries.
The Brigade's 999 Control Officers received five calls about the fire.
The Brigade was called at 0315 and the fire was brought under control by 0524. Crews from Kingston, Surbiton, New Malden, Richmond and Surrey Fire & Rescue attended the scene.
The cause of the fire is under investigation.