Four fire engines and around 25 firefighters were called to a house fire on Browning Avenue in Worcester Park.
Part of the first floor of the property was damaged by fire. One woman was taken to hospital by London Ambulance Service crews.
The Brigade was called at 0844 and the fire was under control at 0956. Fire crews from Sutton, New Malden and Mitcham fire stations attended the scene.
The cause of the fire is under investigation.