Six fire engines and around 40 firefighters were called to a fire at a sheltered accommodation block on Thrawl Street in Spitalfields.
Half of a four roomed flat on the ground floor of the three-storey building was damaged by the fire. There were no reports of any injuries.
The Brigade was called at 0910 and the fire was under control by 0957. Fire crews from Whitechapel, Shoreditch, Shadwell, Dowgate, Bethnal Green and Dockhead fire stations were at the scene.
The cause of the fire is under investigation.