Six fire engines and around 40 firefighters tackled a fire in a flat above a shop on Grand Parade, Green Lanes.
Part of a flat in the mansard roof level was damaged by fire. There were no reports of any injuries.
The fire was discovered by a member of the public who saw smoke coming from the building.
The Brigade was called at 0717 and the fire was under control by 0907. Fire crews from Holloway, Hornsey, Stoke Newington and Tottenham fire stations were at the scene.
The cause of the fire is under investigation by the Brigade and the Metropolitan Police Service.