Firefighters are urging people to ensure they have working smoke alarms in their property after a fire at a house in Roehampton Gate, Roehampton.
A section of the floorboards was damaged by fire.
Watch Manager Jonathan Kerslake, who was a the scene, said: "The property was under redevelopment so there was nobody in at the time of the fire, but crew found there were no working smoke alarms fitted. Thankfully a neighbour saw the smoke and raised the alarm.
"Even if your property is empty, we urge people to have working smoke alarms on every level of your home and to test them regularly. Smoke alarms will give the earliest possible warning if a fire breaks out.”
The Brigade was called at 2044 and the fire was under control at 2156. Four fire engines and 21 firefighters and officers from Richmond, Wandsworth, Fulham and Hammersmith fire stations attended the scene.
The cause of the fire is accidental and is believed to have been caused by electric cables overheating.