Four fire engines and around 20 firefighters responded to a fire in a range of industrial units on Tarrif Road, Tottenham.
Part of the roof in an industrial bakery unit was damaged by the fire. One of the Brigade's 32m ladders was used to reach the fire from above.
The Brigade received the first of two calls reporting the fire at 0357, and firefighters from Tottenham, Edmonton and Walthamstow Fire Station attended the scene.
The cause of the fire is under investigation.