Four fire engines and 21 firefighters were called to a house fire in Luttrell Avenue, Putney.
Approximately half of a loft conversion of a semi-detached house was damaged by fire.
The Brigade was called at 0947 and the fire was under control at 1032. Fire crews from Wandsworth, Richmond, Hammersmith and Fulham fire stations attended the scene.
The cause of the fire is under investigation.