Four fire engines and around 25 firefighters attended a house fire on Limes Avenue in Golders Green.
The ground floor and first floor of the detached house was damaged by fire. There were no reports of any injuries.
The Brigade received the first of four calls at 0032 and Control Officers mobilised crews from Finchley, Hendon and Mill Hill fire stations to the scene. The fire was extinguished by 0218.
The cause of the fire is under investigation.