Four fire engines and around 25 firefighters were called to a fire at a semi-detached house converted into flats on Dartmouth Park Road in Highgate.
Half of a four-room flat on the ground floor and part of a six-room flat on the first and second floors were damaged by the fire. One woman left the building before the Brigade arrived. There were no reports of any injuries.
The Brigade was called at 1225 and the fire was under control by 1333. Fire crews from Kentish Town, Euston and Islington fire stations were at the scene.
The cause of the fire is under investigation.