Four fire engines and around 25 firefighters tackled a fire at a flat on Hereford Road in Enfield.
Part of a two roomed flat on the first floor was damaged by the fire. Three people left the property before the Brigade arrived. There are no reports of any injuries.
The fire is believed to have been accidental and was caused by an extension lead.
A London Fire Brigade spokesperson said: “Overloaded sockets are one of the most common causes of electrical fires. Some electrical appliances use more power than others, so be mindful not to overload extension leads and always check that you’re using the right fuse for the plug.
“Power-hungry appliances such as kettles, toasters and microwaves, shouldn’t be on the same extension. It’s also important to fully unwind drum extension leads. If you leave them coiled, they can overheat and cause a fire.”
One of the Brigade's 32-metre turntable ladders was used as an observation tower to provide the Incident Commander with an aerial view of the fire.
Control Officers took the call at 0619 and mobilised crews from Enfield and Edmonton fire stations to the scene. The incident was over for firefighters at 0818.