Nottinghamshire Fire and Rescue Service received a call at 11.15 pm on Tuesday 14 March to a business in Market Street in Mansfield town centre.
On arrival, crews encountered a significant fire across four floors and the basement and have been firefighting throughout the night.
A spokesperson for the service said:
‘Firefighters are now dampening down the building and monitoring the building for any hidden fire spread.
‘The area will remain closed as we carry out a joint fire and police investigation into the cause later today.
‘At the height of the incident we had eight fire engines with London Road’s aerial ladder platform (ALP), command support vehicle and welfare unit.
‘All people have been accounted for and there have been no injuries.’