Four fire engines and around 25 firefighters tackled a fire at a shop and nightclub on Neasden Lane in Neasden.
A small part of the first floor of the nightclub was damaged by the fire. There were no reports of any injuries.
Control Officers took the first of five calls at 0701 and mobilised crews from Willesden, Park Royal and Hendon fire stations to the scene. The incident was over for firefighters at 0850.
The fire is believed to have been accidental and caused by an electrical fault.