Changing the occupancy of a structure without proper approval is deemed what?

Changing the occupancy of a structure without proper approval is deemed illegal because such actions typically violate local building codes and regulations. These codes exist to ensure public safety, structural integrity, and compliance with zoning laws. Each type of occupancy has specific requirements for things like fire safety, egress, and structural capacity, which are determined through a formal approval process. Without obtaining the necessary permits and approvals, a property owner risks endangering occupants and failing to meet legal obligations, resulting in potential penalties or fines from local authorities.