Fire chiefs are investigating after flames ripped through a repairs garage in Middleton.
Crews were called to the business on Grimshaw Lane just before 1am on Monday.
Six cars and a fork lift truck are understood to have been damaged in the blaze, as well as a HGV chassis and spray paint booth.
Photos from the scene later that morning the building's blackened roof.
There also appears to be severe damage to the inside of the garage.
A spokesman for Greater Manchester Fire and Rescue said fire investigation officers were looking into the incident.
Police also remained at the scene on Monday.
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A statement from GMFRS read: "At 12.46am, five fire engines plus special appliances from GMFRS were called to a commercial building fire on Grimshaw Lane, Middleton.
"The fire involved a single-storey commercial building, which included six cars, one fork lift truck, an HGV chassis and a spray-paint booth.
"Firefighters used an ultra-high pressure cold cutting lance, two hose reels, two breathing apparatus, five jets, two positive pressure ventilation fans, two thermal image cameras, one aerial monitor, lighting, and a short extension ladder to bring the fire under control, clear smoke and prevent the fire from spreading.
"Firefighters remain on scene damping down.
"GMFRS remain on the scene but incident has now been scaled down and fire investigation officers are looking into the incident."
GMP have also been approached for comment.
