Senate Bill 155 mandates that owners of parking structures in Wisconsin must engage a professional engineer to inspect the structural integrity of their facilities at least once every five years. The first inspection must occur within five years of the bill's effective date. Following each inspection, owners are required to submit a report of the findings to the appropriate plan review authority, which may be the Department of Safety and Professional Services or the local governing body if they are authorized to conduct commercial building plan examinations.

The bill also establishes penalties for non-compliance. If an owner fails to conduct the required inspection, they will incur a forfeiture of $200 for each month of violation during a specified six-month period following the inspection deadline. Additionally, if an inspection is not completed within one year of the deadline, the Department of Safety and Professional Services is mandated to close the parking structure until it is inspected and deemed safe for use.