Six fire engines and around 40 firefighters tackled a house fire on Austin Road in Forest Hill.
The roof of a two-storey end-of-terrace house and 12 solar panels were destroyed by fire. A woman left the property before firefighters arrived. There were no reports of any injuries.
The Brigade's 999 Control Officers received five calls about the fire.
The Brigade was called at 0936 and the fire was under control by 1129. Crews from Forest Hill, Lewisham, Lea Green, Greenwich and New Cross fire stations attended the scene.
The fire is being treated as accidental.