Four fire engines and around 25 firefighters responded to a fire on Sandifer Drive, Cricklewood.
The fire occurred in an end of terrace house, consisting of two floors. A single storey lean-to at the rear the property was completely destroyed by the fire. The buildings loft was also heavily damaged by the flames, along with minor damage to the ground and first floor. Four people left the property before the Brigade arrived, and there are no reports of any injuries.
One of the Brigade's 32m ladders was also deployed to the scene, allowing firefighters to monitor the spread of flames in the buildings roof.
The Brigade was first called about the incident 1132, and crews were able to bring the fire under control by 1348. Crews from West Hampstead, Harrow, Hendon and surrounding fire stations attended the scene.
The cause of the fire is under investigation by the Brigade.