6 rules for unincorporated Clay County, Missouri.
Verified from official government sources
In unincorporated Clay County the line that matters is height: a fence over six feet needs a building permit from Planning and Zoning, and shorter fences do not. Liberty, Gladstone, and Kearney set their own yard-by-yard caps.
A fence over six feet in unincorporated Clay County needs a building permit from Planning and Zoning; the fee runs about $125 and includes one inspection. Set posts thirty to thirty-six inches deep to clear the frost line.
Missouri's division-fence law, Chapter 272, makes adjoining owners of enclosed rural or farm land share a boundary fence built to a lawful four-foot livestock standard. It reaches Clay County's farmland north of the river, not city subdivisions.
MO Rev. Stat. §272.020
Any fence consisting of posts and wire or boards at least four feet high which is mutually agreed upon by adjoining landowners or decided upon by the associate circuit court of the county is a lawful fence.
Clay County requires permits for retaining walls above a certain height, typically 4 feet. Engineering review may be required for taller walls.
Clay County requires pool barriers meeting safety codes to prevent drowning. Fences must be at least 4 to 5 feet tall with self-closing, self-latching gates.
No Missouri statute limits residential fence materials, so wood, vinyl, chain-link, and wrought iron are all fair game across Clay County. Barbed wire and electric fence read as agricultural and belong on rural, not suburban, lots.
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