Four fire engines and around 25 firefighters tackled a house fire on Cromwell Street in Hounslow.
Most of the first floor and half of the roof of a detached house were damaged by fire. Six people left the building before the Brigade arrived and four people were assessed on scene.
The Brigade’s Control Officers took the first of 10 calls to the fire at 1156 and mobilised crews from Hillingdon, Fulham, Heathrow and Twickenham fire stations to the scene. The fire was under control by 1308.
The cause of the fire is under investigation.