Four fire engines and around 25 firefighters tackled a café fire on Acton Lane in Harlesden.
Half of the ground floor of a terraced café under refurbishment was damaged by fire. There were no reports of any injuries.
The Brigade was called at 0650 and the fire was under control by 0801. Fire crews from North Kensington, Park Royal, Acton and Wembley fire stations attended the scene.
The cause of the fire is under investigation by the Brigade and the Metropolitan Police Service.