Four fire engines and around 25 firefighters were called to a fire at a cafe on Hodford Road in Golders Green.
Part of the roof void in a single-storey cafe was damaged by the fire. There were no reports of any injuries.
The Brigade was called at 2001 and the fire was under control by 2157. Fire crews from Hendon, West Hampstead and Willesden fire stations were at the scene.
The fire is believed to have been accidental and caused by an electrical fault.