Four fire engines and around 25 firefighters were called to a fire at a house on Cotswold Gate in Cricklewood.
Part of the first floor of a semi-detached house was damaged by fire and part of the roof was also damaged by the blaze. Two men, two women and two children left the building before the Brigade arrived. There were no reports of any injuries.
The Brigade was called at 1905 and the fire was under control by 2040. Fire crews from West Hampstead and Hendon fire stations attended the scene.
The cause of the fire is under investigation.