Building Safety in Clay County, MO (2026)
3 rules for unincorporated Clay County, Missouri.
Verified from official government sources
Building Permits
Clay County requires a permit before anyone erects, enlarges, alters, repairs, moves, converts, demolishes or equips a building or structure in the unincorporated county. Sec. 150.04(A) makes unpermitted work under the adopted 2012 International Building Code unlawful, punishable as a misdemeanor, while accessory farm buildings on 20 or more acres are exempt under RSMo Sec. 64.620.
Clay County Building Permit Requirement
Some RestrictionsClay County, MO Code of Ordinances § 150.04(A)
It shall be unlawful for any person, firm or corporation to erect, construct, enlarge, alter, repair, move, improve, remove, convert, demolish, equip, use, occupy or maintain any building or structure or cause or permit same to be done in violation of this ordinance or any other applicable federal, state or local law, regulation, ordinance or policy. Accessory buildings or structures on agricul...
Electrical Permits
Clay County adopted the 2011 National Electrical Code as its official electric code under Sec. 150.20, so any wiring, service upgrade or electrical installation in the unincorporated county has to meet that code. Three certified copies sit on file with the County Clerk, and the county's Division of Building Safety enforces it through the same permit and inspection process used for building permits.
Clay County Electrical Permit Requirement
Some RestrictionsClay County, MO Code of Ordinances § 150.20
Sec. 150.20. - Electric Code. Section 1. Adoption of the 2011 National Electrical Code (NEC). The provision, appendices, and amendments of the 2011 NEC, published by the National Fire Protection Association, are for all intents and purposes incorporated into this article as fully as if set forth herein, are hereby adopted as the official Electric Code of the County and all provisions thereof sh...
Plumbing Permits
Clay County adopted the 2012 International Plumbing Code as its official plumbing code under Sec. 150.17, so plumbing work in the unincorporated county runs on that code's permit and inspection rules. The county deleted the IPC's own administrative chapter and replaced it with Chapter 1 of the 2012 International Building Code, folding plumbing permits into the same building-permit process.
Clay County Plumbing Permit Requirement
Some RestrictionsClay County, MO Code of Ordinances § 150.17
Sec. 150.17. - Plumbing Code. Section 1. Adoption of the 2012 International Plumbing Code (IPC). The provisions, appendices, and amendments of the 2012 IPC, published by the International Code Council, Inc., are for all intents and purposes incorporated in this article as fully as if set forth herein, are hereby adopted as the official plumbing code of the County and all provisions thereof shal...
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