Four fire engines and around 25 firefighters were called to a house fire on Woodland Terrace in Charlton.
Half of the first floor of the three-storey terraced house was damaged by the fire.
Three people left the property before the arrival of the Brigade. Fortunately, smoke alarms in the property alerted the residents to the fire and they were able to get out of the property. There were no injuries reported.
The Brigade’s Fire Investigators believe the fire was accidental and caused by an unattended candle.
A London Fire Brigade spokesperson said: "This incident shows just how important it is to have working smoke alarms. Thankfully, smoke alarms fitted inside the property were able to give the earliest possible warning to the fire, providing time to escape.
“As a minimum you should have smoke alarms on every floor - in the hallways and the rooms you use the most, plus a heat alarm in the kitchen. They should be tested regularly.
"Candles, incense and oil burners are one of the biggest causes of fire within homes. Always keep an eye on these items to keep you and your home safe.”
The Brigade was called at 1630 and the fire was under control by 1719. Fire crews from East Greenwich and Plumstead fire stations attended the scene.