In St. Louis County, Missouri, short-term rentals (STRs)—commonly referred to as "short-term rental properties"—are legal but subject to specific regulations set forth by local authorities. To operate an STR, property owners must obtain a Short-Term Rental Permit from the county's Planning & Zoning Department, which ensures compliance with health and safety standards, as well as zoning requirements. This permits covers various property types, thriving particularly in urban settings with apartments where demand is driven by both tourists visiting attractions such as the Gateway Arch and business travelers attending events and conferences. The overall market shows a healthy blend of usage, catering to both leisure and corporate clientele. The St. Louis government enforces strict regulations including a maximum of four permits per owner and the payment of required fees to maintain oversight of the industry. The primary local authority overseeing these regulations is the City of St. Louis, with relevant information available at their official site. For more detailed and specific regulatory updates, property owners can also refer to pertinent legislation passed by local government officials.