Four fire engines and around 25 firefighters were called to a fire at a recycling centre on Waldo Road in Bromley.
Waste contained in a unit was alight. There were no reports of any injuries.
The Brigade was called at 1752 and the fire was under control by 1858. Fire crews from Bromley, Beckenham and Sidcup fire stations were at the scene.
The cause of the fire is under investigation.