With one telephone call to (314) 622-4120, you can access all of the information needed in order to open a business in the City of St. Louis. All appropriate applications for occupancy permits, home occupation waivers, earnings tax enrollment, business licenses, contractor's licenses and any other necessary forms will be mailed to you. You can return the completed forms and fees by mail… or with one stop they can be returned to the BAC office in Room 421, City Hall, 1200 Market Street. A BAC Specialist will process the applications with various City departments for you.