@Kurt279 It depends on your local zoning rules but it sounds like a cupboard to me. I doubt it can be classed as a habitable room with no emergency egress.
Hello @Kurt279 and Welcome to our Community Center,
As mentioned by Helen and Mike, this will depend on your local business regulations. Would you mind sharing the location with our members so they can come with their suggestions?
👉Here I am sharing an article that explains the regulations that apply in different locations.