Four fire engines and 21 firefighters and officers dealt with a house fire on Hogarth Road in Edgware this afternoon.
The ground and first floor and the roof of a two storey house were severely damaged by the blaze.
A man left the property before the arrival of the Brigade.
The Brigade was called at 1444 and the fire was under control at 1541. Fire crews from Stanmore, Mill Hill and Hendon fire stations attended the scene. The cause of the fire is under investigation.