Eight fire engines and around 60 firefighters tackled a fire at a house under refurbishment on Park Road in Chiswick.
The whole of the roof and first floor was damaged by fire. Part of an adjacent house roof is also damaged.
The Brigade was called at 1634 and the fire was under control by 1946. Fire crews from Chiswick and surrounding fire stations attended the scene. The cause of the fire is under investigation.