Four fire engines and around 25 firefighters were called to a shop fire on King Street in Twickenham.
Part of the ground floor shop with flats above was damaged by fire. There were no reports of any injuries.
The Brigade was called at 1543 and the fire was under control by 1607. Fire crews from Twickenham, Heston and Richmond fire stations attended the scene.
The fire is believed to have been accidental and involved hot works being carried out.