Six fire engines and 35 firefighters and officers were called to a fire at a commercial unit in St John’s Road, Isleworth.
The unit was gutted by the blaze. There were no reports of any injuries.
The Brigade was called at 2346 and the fire was under control at 0143. Fire crews from Heston, Chiswick, Acton, Richmond and Feltham fire stations attended the scene.
The cause of the fire is under investigation by the Brigade and the Metropolitan Police Service.