Four fire engines and 21 firefighters and officers were called to sheds alight at the rear of properties in Derek Avenue, Wembley.
Two wooden sheds were destroyed by the fire and another one was damaged. There were no reports of any injuries.
The Brigade's 999 Control Officers took 11 calls to the fire.
The Brigade was called at 0530 and the fire was under control at 0722. Fire crews from Wembley, Park Royal and Willesden fire stations attended.
The cause of the fire is under investigation.