Four fire engines and around 25 firefighters tackled a house fire on Clitheroe Avenue in Harrow.
Most of the first floor of the two-storey semi-detached house was destroyed by fire. Two people left the property before the arrival of the Brigade. There were no reports of any injuries.
The Brigade's 999 Control Officers took around six calls to this fire, with the first call received at 0649. Control Officers mobilised crews from Northolt and Wembley fire stations to the scene. The fire was under control by 0739.
The cause of the fire is under investigation.