Four fire engines and around 25 firefighters were called to a fire at a detached house on Beech Hill in Barnet.
Part an electrical room and a shed were damaged by fire. An electric fuse board was destroyed.
The Brigade was called at 1053 and the fire was under control by 1145. Fire crews from Southgate, Finchley, and Enfield fire stations attended the incident.
The cause of the fire is believed to an electrical fault.