Six fire engines and around 40 firefighters were called to a fire at a detached house of three floors on Eaton Rise, Ealing.
The occupants of the house heard a noise in the loft and discovered the fire. All five left the property and called 999. The roof was destroyed by fire. There were no reports of any injury.
The Brigade was called at 0422 and the fire was under control at 0653. Fire crews from Ealing, Acton, Park Royal, Southall, and Northolt fire stations attended the scene.
The cause of the fire is under investigation.