Four fire engines and around 25 firefighters were called to a house fire on Holly Road in Hounslow.
Half of the first floor was damaged by the blaze. There were no reports of any injuries.
The Brigade was called at 1434 and the fire was under control by 1529. Fire crews from Heston, Feltham and Twickenham fire stations were at the scene.
The cause of the fire is under investigation.