St. Peters, MO Building Safety: Plumbing Permits (2026)
Key Facts
- Code adopted
- International Plumbing Code, 2021 Edition
- Enforcing official
- Building Commissioner
- Contractor licensing
- Examined and licensed by St. Charles County
- Exterior water piping depth
- At least 36 inches below grade
- Refund on unused permit
- 90% if no plan review, 80% if reviewed
- Max penalty
- $500 fine and/or 90 days jail per day
Summary
In the City of St. Peters, Missouri, plumbing work is governed by the 2021 International Plumbing Code, adopted in Section 520.010 and enforced by the Building Commissioner. Plumbing and drain-laying contractors must be examined and licensed through St. Charles County, and a permit and its fee under the Title V Schedule of Fees are required before covered work begins.
A certain document, one (1) copy of which has been on file for at least ninety (90) days in the office of the City Clerk of the City of St. ... Peters, being marked and designated as "The International Plumbing Code (IPC), 2021 Edition," as published by the International Code Council, Inc., as amended, and is hereby adopted as the Plumbing Code of the City ... 106.4.90 Licensing, Certifying, And Bonding Of Plumbing And Drain Layer Contractors. Any contractor wishing to enter into the plumbing or drain laying contracting business within the City of St. Peters, Missouri, shall first be duly examined and successfully passed and licensed by St. Charles County; and may be required to obtain a City of St. Peters business license in accordance to Chapter 605, Business Licenses and Business Regulations, of City Code. ... 109.2 Fee Schedule. Where work requires a permit, a fee for each permit shall be paid as required, in accordance with Appendix A, Schedule of Fees, of Title V of the Municipal Code of the City of St. Peters, Missouri for schedule of permit fees.
Full Breakdown
Section 520.010 adopts the 2021 International Plumbing Code as the City's Plumbing Code, with "Code Official" read as the Building Commissioner (Section 520.030) and "Jurisdiction" read as the City of St. Peters (Section 520.020). Section 520.040 amends the adopted code locally: Amendment 106.4.90 requires any plumbing or drain-laying contractor working in St. Peters to first be examined and licensed by St. Charles County, and to obtain a City of St. Peters business license under Chapter 605, and requires firms to employ a licensed supervisor responsible for their installations.
A permit fee is charged under Amendment 109.2 per the Appendix A Schedule of Fees in Title V, and refunds follow a sliding scale under 109.5, from a full refund of an erroneous charge down to no refund once work has started or a permit is voided, on written application within 180 days of payment. Water and sewer piping standards are locally set: exterior water piping must sit at least 36 inches below grade (305.4), and building sewers connecting to private disposal systems must be at least 36 inches below finished grade at the septic tank connection (305.4.1).
Water service connections above the meter must use Type K copper or, for larger lines, PVC with a 12-gauge tracer wire (603.90). Homeowners on their own residence and farm owners on their own structures are excepted from the licensing rule under 106.4.90.3.
Violations & Fines
Installing plumbing work in violation of an approved plan, a Code Official directive, or a permit or certificate issued under the Plumbing Code is an offense under amendment 115.4, punishable under Section 520.050 by a fine of up to $500, up to ninety days in the City or County Jail, or both, with each day of continuing violation charged as a separate offense.
Frequently Asked Questions
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Sources & Official References
Other rules in St. Peters
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