O'Fallon, MO Building Safety: Plumbing Permits (2026)
Key Facts
- Adopted code
- IPC 2021 Edition, Appendix E
- Governing section
- O'Fallon Code § 500.230
- Contractor licensing
- St. Charles County exam and license
- Permit fee refunds
- None (109.6 deleted)
- Max fine
- $500 per offense
- Max jail term
- 3 months
Summary
O'Fallon has adopted the 2021 International Plumbing Code, including Appendix E, as its Plumbing Code, governing plumbing system design, installation, alteration and repair citywide and requiring a permit and fee for that work. Every plumbing or drainlaying contractor must first pass an exam and hold an active license from St. Charles County before working in the city.
That certain document, ... being marked and designated as the International Plumbing Code, 2021 Edition, including Appendix E, as published by the International Code Council, be and is hereby adopted as the Plumbing Code of the City of O'Fallon, in the State of Missouri, for regulating and governing the design, construction, quality of materials, erection, installation, alteration, repair, location, replacement, addition to, use or maintenance of plumbing systems as herein provided; providing for the issuance of permits and collection of fees therefor ... 103.90 Licensing of plumbing/drainlaying contractors. Any contractor wishing to enter into the plumbing business within the City of O'Fallon shall first be duly examined and be successfully passed and licensed by St. Charles County, Missouri, and hold an active license.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4860992; v58 updated 2026-05-14; through 05-14-2026).
Full Breakdown
230 adopts the International Plumbing Code, 2021 Edition, including Appendix E, as published by the International Code Council, as O'Fallon's Plumbing Code, covering the design, construction, quality of materials, erection, installation, alteration, repair, location, replacement, addition to, use and maintenance of plumbing systems, and providing for the issuance of permits and collection of fees. 90, which requires any contractor entering the plumbing or drainlaying business in O'Fallon to first pass an exam and hold an active license from St. Charles County. 6's refund provision entirely, meaning permit fees paid under this Article are not refunded. 260.
Violations & Fines
Installing plumbing work in violation of an approved plan, a Building Official directive, or a permit or certificate issued under the Plumbing Code is punishable under Section 500.260 by a fine of up to $500, imprisonment of up to three months, or both, with each day a violation continues charged as a separate offense.
Frequently Asked Questions
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Sources & Official References
Other rules in O'Fallon
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