Four fire engines and around 25 firefighters tackled a fire at a barber shop on Randlesdown Road in Bellingham.
Half of the basement was damaged by fire. Two adults and child were led to safety from an adjacent property by firefighters wearing breathing apparatus. There were no reports of any injuries.
The Brigade was called at 1010 and the fire was under control by 1101. Fire crews from Lewisham, Forest Hill, Beckenham and Lee Green fire stations attended the scene.
The cause of the fire is under investigation.