Four fire engines and around 25 firefighters dealt with an office fire on Nine Elms Lane in Wandsworth.
Four paladins and a stack of timber was damaged by fire.
The Brigade was called at 1742 and the fire was under by 1846. Fire crews from Lambeth, Clapham, Battersea and Brixton fire stations were at the scene. The cause of the fire is believed to be accidental.