Four fire engines and 21 firefighters and officers were called to a fire at a house in Brightside Road, Hither Green on Saturday.
Around three quarters of the loft conversion and part of the first floor was damaged by fire. One person left the property before the arrival of the brigade and was treated at the scene for shock by London Ambulance Service.
The Brigade was called at 2321 and the fire was under control at 0018 on Sunday (March 11). Fire crews from Greenwich, Forest Hill, Lee Green and Lewisham fire stations attended the scene.
The cause of the fire is under investigation.