Four fire engines and around 25 firefighters were called to a fire at a house on Woodhyrst Gardens in Kenley.
Part of the ground floor and external fascia of a detached house were damaged by the blaze. Two people left the building before the Brigade arrived. There were no reports of any injuries.
The Brigade’s Fire Investigators believe the fire was caused by burnt waste which had been left on wooden decking.
Station Commander Richard Hamilton, who was at the scene, said: “The fire had spread from the decking into the house before crews arrived but quick firefighting action prevented it spreading further.
“Burnt waste had been left on the wooden decking and caught light and spread to the house.
“If you are burning waste in your garden, you should do it well clear of buildings, garden sheds, hedges and decking and always keep a bucket of water or hosepipe nearby.
“You should also never leave it unattended. An adult should supervise it until it has burnt out and if it has to be left, dampen it with plenty of water.”
The Brigade was called at 1331 and the fire was under control by 1443. Fire crews from Purley, Croydon and Addington fire stations were at the scene.