Firefighters attended a blaze overnight at Coffs Harbour’s Park Beach Homebase.
A number of shops have been damaged in the blaze which is understood to have started in a back store room of one of the businesses.
Crews arrived around 9:30pm to battle the late night blaze, bringing it under control and safe around 3am.
Hazmat crews also attended the scene.
One Triple M listener nearby said they could smell strong fumes like burning plastic just prior to hearing the sirens.
Trade for a number of businesses is expected to be interrupted while the clean-up gets underway on Friday.
Investigations into the cause of the fire will commence with NSW Police and Fire and Rescue NSW.