Four fire engines and around 25 firefighters responded to a fire on Pinner Road in Harrow.
The fire occurred in an end of terrace property, consisting of a takeaway restaurant with flats above. Part of the ground floor commercial space was damaged by the fire. There are no reports of any injuries.
The Brigade was first notified about the fire at 0201 and the incident was under control by 0456. Crews from Harrow, Wembley, Stanmore and surrounding fire stations attended the scene.
The cause of the fire is under investigation.