Four fire engines and around 25 firefighters were called yesterday to a fire at a shop with flats above.
The building in High Road, Tottenham, had half the loft and part of the roof damaged by the fire.
Around ten people left the building before the brigade arrived and there were no reports of any injuries.
A London fire brigade spokesperson said: “Smoke alarms fitted inside the property alerted residents to the fire in the common roof space of the building.
“Smoke alarms give the earliest possible warning to fire, providing time to escape.
“You should have smoke alarms in every room where a fire could start, plus a heat alarm in the kitchen. It’s important to test them regularly.”
The brigade was called at 06:11am and the fire was under control by 06:56am.
Fire crews from Tottenham, Edmonton, Stoke Newington and Walthamstow fire stations attended the scene.
The cause of the fire has been recorded as undetermined.