Six fire engines and around 40 firefighters were called to a fire at a shop with offices above on Whitechapel Road, Whitechapel.
The fire damaged a small part of the basement and there are currently no reports of any injuries.
Brigade Control Officers were first notified at 0651 with crews from Whitechapel, Bethnal Green, Shadwell and surrounding fire stations mobilised to the scene. Firefighters were able to bring the incident under control by 1003.
The cause of the fire is under investigation by the Brigade’s Fire Investigation Team.