An investigation into the fire at a building in Dock Road has found that it was started deliberately.
They worked through the night to extinguish the blaze and reinspected the building at 7.30am this morning.
No-one was injured in the fire, said Nottinghamshire Fire and Rescue Service.
District manager Leigh Holmes said: “This was a well-developed fire, that crews worked hard throughout the night to extinguish.
"The use of these resources could’ve been avoided. If you know any information about deliberate fire setting in your community, I encourage you report it anonymously to FireStoppers on 0800 169 5558.”