Four fire engines and 21 firefighters and officers were called to a fire at a house in Wrythe Lane, Carshalton.
Half of the first floor of an end-of-terraced house was damaged by the fire. There were no reports of any injuries.
The Brigade was called at 2047 and the fire was under control at 2126. Fire crews from Mitcham, Sutton and Wallington fire stations attended the scene.
The cause of the fire is under investigation.