Four fire engines and 21 firefighters and officers were called to a fire at a house in Bark Hart Road, Orpington.
Parts of the loft as well as the adjacent house's loft were damaged by fire. A man left the premise before the arrival of the Brigade.
The Brigade was called at 0823 and the fire was under control at 0931. Fire crews from Orpington and Sidcup fire stations attended the scene.
The cause of the fire is under investigation.