Four fire engines and around 25 firefighters were called to a fire at a house on Mansfield Drive in Hayes this morning.
Firefighters from Hillingdon, Southall and Hayes fire stations were called at 9:49 and the fire was under control by 10:21.
There were no reports of any injuries but most of the first floor of a semi-detached house was damaged.
The cause of the fire is under investigation.