21 firefighters and officers attended a fire in a ground floor flat on Spencer Road, Acton early this morning.
One man left the building before the arrival of the Brigade and around a third of the flat was damaged by the fire.
4 fire engines from Acton, Chiswick, Ealing and Hammersmith fire stations attended the incident.
The Brigade was called at 2302 and the fire was under control at 0012.
The cause of the fire is under investigation.