Firefighters were called to reports of two vehicles alight on Hassop Road in Cricklewood.
One car and a box van containing car parts were damaged by fire. Four further cars were damaged by radiating heat from the blaze. There were no reports of any injuries.
The Brigade's 999 Control Officers took 10 calls to the fire.
The Brigade was called at 0401 and the fire was under control by 0555. Fire crews from West Hampstead fire station attended the scene.