The fire broke out at a car dismantlers in Lisle Avenue, at around 6pm on Friday, May 22.
Firefighters from Hereford and Worcester Fire and Rescue Service tackled the blaze for nearly three hours.
Firefighters urged people to avoid the area at the height of the fire and residents were asked to close their doors and windows.
One unit was involved in the fire – which also saw a storage hut and two storage vans completely destroyed. Crews left the scene shortly after 10pm.
West Mercia Police said the fire is not believed to be suspicious.
A spokesman from Hereford and Worcester Fire and Rescue Service said: "Four crews – three from Wyre Forest and one from Bromsgrove – were called to a fire at a car dismantlers in Lisle Avenue in Kidderminster at 6.06pm on Friday, May 22.
"One unit, approximately 15 metres by 60 metres, was involved in the fire with one storage hut and two storage vans completely destroyed.
"Firefighters using six breathing apparatuses and three hosereel jets, augmented from open water, tackled the fire.
"Two triple-extension ladders, two drag hooks and two ceiling hooks were also used.
"Police also attended for crowd-control purposes. The incident was closed at 10.01pm."
A West Mercia Police spokesman added: "At approximately 7.30pm on Friday the fire service requested our assistance on Lisle Avenue to keep the area safe whilst they responded to a fire as a number of people had gathered.
"At this time the fire is not believed to be suspicious."