Twenty firefighters tackled a fire at an industrial park in Neasden on Friday morning (July 17).
Four fire engines were called to the scene, on the North Circular Road, at around 11.20am and remain on the scene.
London Fire Brigade (LFB) confirmed they were at the scene of the fire, which also set light to two parked cars near the building.
According to an LFB spokesman, firefighters were called to the industrial park after external cladding caught light, with the fire then spreading to two parked cars nearby.
There are no reports of any injuries.
LFB confirmed at 11.37am that the fire had been brought under control.
According to Transport for London (TfL), one lane eastbound is currently closed with queue tailbacks to Abbey Road.
It comes just a few weeks after an industrial estate in Perivale was gutted by a huge blaze, which sent smoke billowing over London.