Four fire engines and around 25 firefighters tackled a fire at a laundrette on Dukes Road in Acton.
Part of the single-storey commercial laundry unit was damaged by fire. There are no reports of any injuries.
The Brigade was called at 0531 and the fire was under control by 0712. Crews from Acton, Park Royal and Wembley fire stations attended the scene.
The cause of the fire is under investigation.