Firefighters were called to a blaze in a detached house which is under renovation on High Cedar Drive in Raynes Park, SW20, today.
Around half of the roof was damaged by fire. No injuries were reported.
The Brigade was called at 1457 and the fire was under control by 1535.
Four fire engines and 20 firefighters attended the incident. Fire engines came from Kingston, Wandsworth, Wimbledon and Sutton fire stations.
The cause of the fire is under investigation.