Four fire engines and around 25 firefighters were called to a house fire on Bressey Avenue in Enfield.
The majority of the roof and part of the first floor was damaged by fire.
Two men and a woman left the property before the Brigade arrived.
The Brigade was called at 2314 and the fire was under control by 0041. Fire crews from Enfield and Edmonton fire stations were at the scene. The cause of the fire is believed to be accidental.