Four fire engines and 21 firefighters and officers were called to a fire at a house conversion in Ashley Road, Holloway this morning.
Half of a third floor flat and loft conversion were damaged by fire. One man left the property before the arrival of the Brigade.
The Brigade was called at 0229 and the fire was under control at 0342. Fire crews from Holloway, Hornsey and Kentish Town fire stations attended the scene.
The cause of the fire is under investigation.