Mo. Rev. Stat. § 88.804: Council may require owners to build or repair sidewalks (cities, under 10,000).

The council of any incorporated town or city in this state having a special charter and containing ten thousand inhabitants or less, shall have power, by ordinance, to cause the owner or owners of any property or lot adjacent to any street or alley in said town or city to build, pave, construct, improve or repair any sidewalk along the side of said property or lot in such town or city.