Six fire engines and around 40 firefighters tackled a house fire on Park Lane in Hayes.
Half of the ground floor and a small part of the first floor of a three-storey semi detached house was damaged by the fire. Six people left the property before the Brigade arrived.
The Brigade was called at 0118 and the fire was under control at 0227. Fire crews from Hayes, Hillingdon, Southall and Heathrow fire stations were in attendance.
The cause of the fire is under investigation.