Ten fire engines and around 70 firefighters were called to a fire at a range of industrial units on Oxgate Lane in Brent.
Firefighters tackled a fie at a range of industrial units, where around a quarter of the units were damaged by the fire. There were no injuries reported.
The Brigade was called at 1600 and the fire was under control by 1844. Crews from Hendon, Willesden, Wembley, Park Royal, Finchley North Kensington and other surrounding fire stations attended the scene.
The cause of the fire is under investigation.