Four fire engines and around 25 firefighters were called to a house fire at Doncaster Gardens in Northolt.
Part of the first floor and loft conversion of the terraced house were damaged by the fire. One child left before firefighters arrived and was treated for shock at the scene by London Ambulance Service.
The Brigade was called at 1853 and the fire was under control by 2005. Fire crews from Northolt, Harrow and Southall fire stations attended the scene.