Mo. Rev. Stat. § 229.230

No person, firm or corporation shall move, haul or transport any house, building or other structure upon, across or over any public highway outside of the limits of any city of the first, second or third class, or any city existing under a scheme and charter or a special charter in the state of Missouri, without first obtaining a permit therefor, as provided in section 229.240; provided, that nothing herein shall apply to a city having a population of fifteen thousand or less.