Four fire engines and around 25 firefighters attended a house fire on Levett Gardens in Ilford.
Part of a semi-detached bungalow was damaged by fire. There were no reports of any injuries.
The fire is being treated as accidental and believed to have been caused by a candle that had been left unattended.
A London Fire Brigade spokesperson said: "Candles are one of the most common causes of fire. It’s really important that you never leave a candle unattended and keep them away from anything else that can easily catch alight.
“Consider using battery-powered, flameless LED candles instead, which are safe even if you fall asleep. Whilst they may cost more upfront than traditional candles, they will last considerably longer, giving you better value for money.
“If you do choose to use traditional candles ensure you place them in a heat-resistant holder, on a stable surface where they won’t be knocked over and away from materials that could catch fire. Never leave them unattended around your home, take particular care with children and pets and blow them out properly before you go to bed."
The Brigade received the first of three calls at 1007 and Control Officers mobilised crews from Ilford, Dagenham and Barking fire stations to the scene. The fire was extinguished by 1047.