Six fire engines and around 40 firefighters tackled a fire at a detached chalet bungalow on Balder Rise in Grove Park.
The first floor was destroyed by the fire. Half of the roof was also damaged by the fire. There are currently no reports of any injuries.
The Brigade was called at 0529 and the fire was under control by 1058. Firefighters from Lee Green, Bromley and Eltham attended the scene.
The cause of the fire is being treated as accidental.