Four fire engines and around 25 firefighters tackled a fire at a block of flats on Telford Avenue in West Norwood.
Part of a three roomed flat on the first floor was damaged by the fire. There were no reports of any injuries.
The Brigade was called at 1006 and the incident was over for firefighters at 1130. Crews from Tooting, Clapham and West Norwood fire stations attended the scene.
The cause of the fire is under investigation by the Brigade and the Metropolitan Police Service.