Four fire engines and around 25 firefighters were called to a fire at a lodge on Roding Lane South in Ilford.
Most a pre-fabricated lodge was completely destroyed by fire. There were no reports of any injuries.
The fire is believed to have been accidental and caused by an unattended candle.
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's 999 Control officers received the first of three calls alerting them to the fire at 1317. They mobilised crews from Woodford, Ilford, Leytonstone and Walthamstow fire stations. The fire was under control by 1426.