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PermitRoadmap

Building permits in Unincorporated Johnson County

Unincorporated Johnson County does not issue residential building permits. Johnson County has no building code and issues no building permits in unincorporated areas, except inside the Whiteman Air Force Base Zoning Area, handled by the Military Airport Zoning Commission (660-463-7934).

That does not make the work unregulated. The construction standard still applies, trade licensing still applies, and separate approvals such as on-site sewage, floodplain development, and driveway access are handled by other offices. Below are the contact details for the office to ask, plus guides for the projects homeowners ask about most.

Missouri has no statewide residential building code, so the rules in Unincorporated Johnson County come from whichever city or county code covers the address. Cities adopt and enforce their own codes, and a county may adopt a code for its unincorporated area only under RSMo 64.170, which since 2001 has required voter approval for counties without a prior code. Many rural counties have no county building code, and in those areas no state agency issues residential building permits in its place, although floodplain, utility, septic, and propane rules can still apply. There is no statewide dollar or size exemption from permits. Confirm the rules for Unincorporated Johnson County with the city or county building office that has jurisdiction before starting work.

Permit guides for Unincorporated Johnson County

Roof replacement or repairWindow or exterior door replacementSolar panel installationShed or accessory structureAddition or structural alterationInterior remodelingScreen enclosure or pool cageFence installation or replacementSwimming pool or spaPavers, driveway, or hardscapeHVAC replacement or installationElectrical panel or service upgradeStandby generator installationWater heater replacementPlumbing fixture or repiping

Permit FAQs for Unincorporated Johnson County

Do I need a building permit in Unincorporated Johnson County?
Johnson County has no building code and issues no building permits in unincorporated areas, except inside the Whiteman Air Force Base Zoning Area, handled by the Military Airport Zoning Commission (660-463-7934).
Who issues building permits in Unincorporated Johnson County?
Nobody does. Unincorporated Johnson County does not run a residential building permit program, which is why this page lists the Unincorporated Johnson County building department as the office to contact rather than as a permit issuer. Your mailing city is not always the authority over your property, so confirm which jurisdiction you are actually in before assuming this applies to you.
What still applies in Unincorporated Johnson County if there is no building permit?
The construction standard does. Work must still meet No statewide residential code; cities and counties adopt their own codes locally, typically an edition of the International Residential Code, and many rural counties have adopted none, and trade licensing rules apply regardless of whether a permit is issued. Separate approvals such as on-site sewage, floodplain development, and driveway access to a public road are handled by other offices and are unaffected. Ask the Unincorporated Johnson County building department which of those reach your property before you start.

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.