The Department of Planning provides both countywide services as well as municipal-type services to the unincorporated areas of St. Louis County. Our primary duties include:

  • Administer the Zoning Ordinance and Subdivision Ordinance
  • Staff the St. Louis County Planning Commission and St. Louis County Board of Zoning Adjustment
  • Review site plans and subdivision plats
  • Promote citizen engagement
  • Assess boundary issues before the Boundary Commission
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Contact Information

41 South Central, Clayton, MO 63105

Mon-Fri: 9AM - 5PM