Six fire engines and around 40 firefighters were called to a fire at a shop with a flat above, on Coppermill Lane in Walthamstow.
A small part of the roof void was destroyed by fire in the two storey building. One person left the property before the Brigade arrived. No injuries are reported.
The Brigade's 999 Control officers were first alerted to the fire at 1314 and mobilised crews from Walthamstow, Leyton, Tottenham, Leytonstone and Homerton fire stations to the scene. The fire was under control by 1409.
The cause of the fire is under investigation.