Four fire engines and around 20 firefighters and officers were called to a fire at a restaurant in Harrow Road, Wembley.
All of the restaurant's front signage was damaged by fire. Part of the ground floor was also damaged in the blaze.
Seven people left the restaurant before the arrival of the Brigade. There were no reports of any injuries.
The Brigade was called at 1819 and the fire was under control at 1844. Fire crews from Wembley, Northolt and Park Royal fire stations attended the scene.
The cause of the fire is believed to be accidental and due to an electrical fault.