Four fire engines and 25 firefighters were called to a fire in a garden on Anglesey Road in Enfield.
A trampoline, shed and a greenhouse were completely destroyed by fire as well as part of the garden.
The Brigade’s 999 Control centre received 38 calls alerting them to the incident.
Fire investigators believe the fire was caused by the bonfire burning out of control.
The Brigade was called at 2058 and the incident was over by 2206. Fire crews from Edmonton, Enfield and Chingford attended the scene.