Fence Regulations in Cass County, MO (2026)
3 rules for unincorporated Cass County, Missouri.
Verified from official government sources
Height Limits
In unincorporated Cass County, the Zoning Order caps residential fences, hedges and privacy walls at eight feet above grade, and allows them within the front, side or rear setback. A rear fence next to a neighboring front yard must instead sit back to that front setback line, protecting sightlines for the adjoining home.
Cass County Residential Fence Height Limit
Light RestrictionsCass County Code § 400.030(A)(23)(o)
In districts or parcels designated as residential, fences, hedges and privacy walls may be located in side, rear or front setback spaces if not exceeding eight (8) feet in height above the general grade, except that rear fences or walls shall conform to the front setback requirement where they are adjacent to the front yard of a neighboring residence. ... Fences, walls and hedges in commercial ...
Retaining Walls
Unincorporated Cass County requires an engineered design for a retaining wall once it holds back more than 48 inches of unbalanced backfill without permanent lateral support at the top or bottom. The Building Codes Department's amended IBC Section 106.3.4.1.1 lists eleven other conditions, including masonry walls over 4 feet of unbalanced backfill, that trigger the same design requirement.
Cass County Retaining Wall Design Rules
Some RestrictionsCass County Code § 500.010
IBC Section 106.3.4.1.1. Design required. Amend as follows: Design required. A design in accordance with accepted engineering practice shall be provided for concrete or masonry foundation walls when any of the conditions listed below are found to exist. ... Foundation walls and retaining walls supporting more than 48 inches (1219 mm) of unbalanced backfill that do not have permanent lateral sup...
Material Restrictions
Cass County's Zoning Order does not ban barbed wire, but it restricts electric fencing: electric fences are allowed only on lots of three acres or more, and any electric fence installed must meet the County Building Codes' electrical standards, under Section 400.030(A)(23)(o)(2).
Cass County Electric Fence Acreage Rule
Some RestrictionsCass County Code § 400.030(A)(23)(o)(2)
Electric fences shall be permitted on lots of three (3) acres or greater in size and must conform to Building Codes standards regarding electrical usages.
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