Six fire engines and around 40 firefighters responded to a fire on Burghley Yard, Tufnell Park.
The fire was located in the roof of a warehouse, consisting of two floors, currently under refurbishment. Around 11 people left the building before crews arrived. There are no reports of any injuries.
The Brigade was first called about the fire at 1405, and Control Officers mobilised crews from Kentish Town, Islington, Holloway and surrounding stations to the scene. Firefighters had the incident under control by 1612.
The cause of the fire is under investigation.