Four fire engines and around 25 firefighters were called to reports of sheds alight on Wrythe Lane in Carshalton.
Two timber sheds and around 20 metres of garden fencing were destroyed and most of a block and timber outbuilding was also damaged by the blaze. There were no reports of any injuries.
The Brigade’s 999 Control Officers took 20 calls to the fire.
The Brigade was called at 1615 and the fire was under control by 1707. Fire crews from Sutton, Tooting, Mitcham and Wallington fire stations attended the scene.
The cause of the fire is under investigation.