Four fire engines and around 25 firefighters tackled a house fire on Bramblewood Close in Carshalton.
Half of the ground floor of a mid-terraced house was damaged by fire. Three people left the property before the Brigade arrived uninjured.
A London Fire Brigade spokesperson said: "Firefighters recommend that you have a look at our online Home Fire Safety Checker to make sure there are no hidden hazards in your home.
“The online tool will ask you a series of questions that will help us work out the level of risk in your home, or the home of someone you care for. It only takes a few minutes to get tailored advice to keep yourself and loved ones safe from fire.”
The Brigade was called at 1550 and the fire was under control by 1641. Fire crews from Mitcham, Wallington and Sutton fire stations attended the scene.
The cause of the fire is under investigation.