Four fire engines and around 25 firefighters were called to a fire at a shed on Great West Road in Isleworth.
A shed attached to the house was destroyed by fire and part of the external insulation on the house. Five people evacuated the house before the Brigade arrived.
The Brigade was called at 1152 and the incident was under control by 1312. Fire crews from Acton, Richmond and Twickenham fire stations were in attendance.
The cause of the fire is under investigation.