Four fire engines and around 25 firefighters were called to a fire at a house on Hatherleigh Close in Mill Hill.
One garden shed was destroyed by the blaze. Part of the garden fencing, plants and guttering on the side of the house were also damaged.
The Brigade's 999 Control officers took 19 calls alerting them to the fire.
The Brigade was called at 1238 and the fire was under control by 1344. Fire crews from Mill Hill, Hendon and West Hampstead fire stations attended the scene.
The cause of the fire is under investigation.