Six fire engines and around 40 firefighters were called to a fire at a house on Talbot Road in Hornsey.
Part of the first floor in the two storey house was destroyed by house. Two people left the building before the Brigade arrived.
The Brigade's 999 Control officers received the first of nine calls at 0807 and the incident was over by 1037. Fire crews from Hornsey, Kentish Town, Holloway and Finchley fire stations were in attendance.
The cause of the fire is believed to be due to an electrical fault.