Six fire engines and around 40 firefighters were called to a restaurant fire on Turnpike Lane in Wood Green.
Part of the ground floor of the restaurant was damaged by fire. There were no diners at the time and there no reported injuries.
The Brigade was called at 0410 and the fire was under control by 0626. Fire crews from Hornsey, Tottenham, Holloway and Stoke Newington fire stations attended the scene.
The cause of the fire is under investigation by the Brigade and the Metropolitan Police Service.