Eight fire engines and 58 firefighters and officers were called to a fire at a block of flats in Heritage Lane, West Hampstead.
Five balconies were destroyed in the fire. The Brigade’s 999 control officers received 40 calls about the incident.
The Brigade was called at 11.25am and the fire was under control at 1.10pm. Fire crews from West Hampstead, Paddington, Willesden, and surrounding fire stations attended the scene.
The cause of the fire is under investigation.