Six fire engines and around 40 firefighters were called to a fire at a terraced house in Highbury Terrace in Highbury.
Part of the basement of the property was damaged by fire. One person left the building before the arrival of the Brigade and there were no reports of any injuries.
The Brigade was called at 0728 and the fire was under control at 0836.Fire crews from Islington, Holloway, Stoke Newington, Kentish Town and Euston fire stations attended the scene.
The cause of the fire is under investigation.