Cass County, MO Building Setbacks & Zoning: Setback Rules (2026)

Property line setbacks are fixed district by district under the Zoning Order's Article VI district standards. 270(D)(2), the front setback 'shall have a depth of not less than fifty (50) feet from road right-of-way,' the side setback 'shall be a minimum twenty-five (25) feet,' and the rear setback 'shall be a minimum fifty (50) feet'; a lot fronting on two roads must meet the front setback on both. 290(D)(2), keep the same 50-foot front setback but scale the side setback to 10% of lot width (never less than 10 feet or more than 25 feet) and the rear setback to 30% of lot depth (capped at 50 feet).

300(D)(2), tightens further: front setback 25 feet, side setback 10% of lot width with a 6-foot floor and 15-foot ceiling, and rear setback 30% of lot depth capped at 25 feet. 030(A)(23)(n): a building fronting or siding on an arterial street cannot sit closer to the street centerline than the required front setback plus 50 additional feet, and on a collector street the addition is 40 feet. 030(A)(22): the Zoning Enforcement Officer issues notice, the owner has ten days to correct or seek a Compliance Action Plan, and uncorrected cases go to Circuit Court where fines run up to $1,000 per day.