Four fire engines and 21 firefighters and officers were called to a fire in Hook Road, Chessington.
A single storey outbuilding was completely damaged by fire. Part of the soffit and guttering of a neighbouring property was also damaged in the blaze.
The Brigade was called at 1310 and the fire was under control at 1436. Fire crews from Surbiton, Twickenham and Mitcham fire stations attmded the scene.
The cause of the fire is currently unknown.