Four fire engines and around 25 firefighters tackled a fire at the railway arches on Albion Mews in Hammersmith.
Part of a commercial unit was damaged by fire. There were no reports of any injuries.
The Brigade was called at 1355 and the fire was under control by 1535. Fire crews from Hammersmith, Kensington and Acton fire stations attended the scene.
The cause of the fire is under investigation.