Four fire engines and around 25 firefighters were called to a fire at a house on Popes Lane in Ealing.
Half of the first floor of the semi-detached house was damaged by fire. Part of the ground floor and roof was also damaged by fire. There were no reports of any injuries.
The Brigade was called at 0025 and the fire was under control by 0205. Fire crews from Acton, Ealing, Chiswick and Richmond fire stations attended the scene.
The cause of the fire is under investigation by the Brigade.