Ten fire engines and around 70 firefighters tackled a fire at a mid-terraced townhouse converted into flats on Mangold Way in Erith.
The first and second floors were destroyed and most of the ground floor was damaged by the fire. Additionally, a small part of the external fascia of two neighbouring houses were damaged by the fire. One woman left the building before the Brigade arrived and was treated on scene by London Ambulance Service.
Three gas cylinders were cooled to an ambient temperature and removed as a precaution, as some cylinders can explode when exposed to heat.
One of the Brigade's 32-metre turntable ladders was used at the scene as an observation tower to provide the Incident Commander with an aerial view of the fire.
Control Officers took the first of 32 calls at 1916 and mobilised crews from Erith, Bexley and East Greenwich fire stations to the scene. The fire was under control by 2116.
The fire is believed to have been accidental and caused by a hose leak for a gas cylinder.