Who issues the permit in Unincorporated Clark County?

We have not yet confirmed which office issues building permits in Unincorporated Clark County, or whether one does. Ask the Clark County Commission, which is the county's main government office, who handles permits for your address. Your mailing city is not always the permitting authority.

How do I find out the exact requirements for my project?

Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.

Do I need a permit for retaining wall construction in Unincorporated Clark County?

We have not yet confirmed which office issues building permits in Unincorporated Clark County. Ask the Clark County Commission who handles permits for your address before you start.

The requirements below come from Missouri rules. They are not a statement that Unincorporated Clark County issues or does not issue permits.

Permit may be required

It depends. Whether retaining wall construction needs a permit in Unincorporated Clark County comes down to the details of your project.

Missouri has no statewide residential building code; whether a permit is required depends entirely on the city or county code that covers the address. Missouri has no statewide height exemption for retaining walls; each local code sets the height above which a permit and engineering are required. Many rural Missouri counties have not adopted a county building code, and a county code applies only outside city limits; inside a city, the city's own code governs. Missouri law requires notice to the underground facility notification center at least 2 but not more than 10 working days before excavating, including digging on private property (RSMo 319.025 and 319.026). This wall will hold up a driveway, patio, structure or sloped ground, which puts extra load on it (a surcharge). Model code exemptions for short retaining walls specifically exclude walls supporting a surcharge. Surcharged walls commonly need an engineered design, drainage behind the wall, and an inspection, because a failure can undermine whatever sits above it.

Get your exact answer

Answer a few questions to see the specific permits, documents, and next steps for your retaining wall construction in Unincorporated Clark County.

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Documents you may need

Building permit application for a wall above the locally set height, where a local code appliesSometimes required
Engineered design for a tall wall or one supporting a driveway, slope, or structure, where the local code requires itSometimes required
Site plan showing the wall location, height, and property linesSometimes required
Drainage and backfill detailsRecommended

Possible inspections

Footing or excavation inspection where a local code issued a permit
Final inspection where a permit was issued

Frequently asked questions

Do I need a permit for retaining wall construction in Unincorporated Clark County?: It depends. Whether retaining wall construction needs a permit in Unincorporated Clark County comes down to the details of your project. The documents and inspections sections on this page list what the building department typically asks for.
Who issues the permit in Unincorporated Clark County?: We have not yet confirmed which office issues building permits in Unincorporated Clark County, or whether one does. Ask the Clark County Commission, which is the county's main government office, who handles permits for your address. Your mailing city is not always the permitting authority.
How do I find out the exact requirements for my project?: Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.

PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.