Four fire engines and around 25 firefighters were called to a fire at a house on Greenwood Close in Morden.
The ground floor and first floor of an end-of-terraced house were damaged by the fire. Two people left the property before the Brigade arrived. One man suffering smoke inhalation was taken to hospital as a precaution by London Ambulance Service crews.
The Brigade was called at 1008 and the fire was under control by 1105. Fire crews from Wimbledon, New Malden, Mitcham and Sutton fire stations attended the scene.
The cause of the fire is under investigation.