Ten fire engines and 72 firefighters and officers were called to a fire at a shop with flats above in High Street, Orpington.
A small part of the roof was damaged by the fire. Around 30 people left the property before the Brigade arrived. There were no reports of any injuries.
The Brigade was called at 0940 and the fire was under control at 1502. Fire crews from Orpington, Sidcup, Bromley and Eltham fire stations attended the scene.
The cause of the fire is believed to be due to hot works being carried out on an area of the flat roof.