Four fire engines and 21 firefighters and officers were called to a fire at a block of care home flats in Thesiger Road in Penge.
A flat on the first floor of the building was damaged by fire.
One man was led to safety by staff at the care home before the arrival of the Brigade.
The Brigade was called at 2032 and the fire was under control at 2151. Fire crews from Forest Hill, Woodside, Beckenham and West Norwood fire stations attended the scene.
The cause of the fire is under investigation.