Mo. Rev. Stat. § 64.285: Zoning regulations to supersede other laws or restrictions, when (noncharter first class counties).

Whenever the county zoning regulations made under the authority of sections 64.211 to 64.295 require a greater width or size of yards, courts, or other open spaces, or require a lower height of building or less number of stories, or require greater percentage of lot to be left unoccupied, or require a lower density of population, or require a more restricted use of land, or impose other higher standards than are required in any other statute, local order or regulation, private deed restrictions or private covenants, the provisions of the regulations made under authority of sections 64.211 to 64.295 shall govern.