Plumber License from Illinois to Missouri: Does It Transfer? (2026)
Last verified: 2026-07-21 · source: No state plumbing board — the Missouri Division of Professional Registration does not license plumbers; licensing is local (e.g., St. Louis Board of Examiners of Plumbers and Drainlayers) ↗
No — Missouri has no reciprocity or endorsement path for Illinois plumbing license holders. You must apply to the No state plumbing board — the Missouri Division of Professional Registration does not license plumbers; licensing is local (e.g., St. Louis Board of Examiners of Plumbers and Drainlayers) as a new applicant and meet Missouri's full licensing requirements, including its exams.
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Verdict
Full re-application
There is nothing at the state level to transfer your Illinois license into: Missouri issues no statewide plumbing license, so plumbers there are licensed at the contractor level or by cities and counties. Not applicable — Missouri issues no state-level plumber license; each city or county board of examiners sets its own examination, so there is no statewide credential to transfer and no state exam to waive. The move is a local or contractor-board application, not a reciprocity filing — identify the authority that governs your worksite and work from its exam, experience, and fee rules. Your Illinois license may count toward a local experience requirement, but Missouri has no state credential for it to reciprocate into.
What changes, Illinois → Missouri
| Illinois (current) | Missouri (destination) | |
|---|---|---|
| Application fee | $225 (Application fee for a plumber registered or licensed in Chicago or outside Illinois is $225 (an in-state Illinois licensed-apprentice applicant pays $175); a separate $150 plumber's license fee applies on issuance (68 Ill. Adm. Code 750.1100). The City-of-Chicago reciprocity (license without exam) carries a $150 license fee. Returned-check fee $100) | No state fee — plumber licensing fees are set by each local jurisdiction and vary; consult the specific city or county board |
| Processing time | No board-stated processing time; the examination application is due at least 30 days before the examination date | No statewide process; timelines are set by each local board (e.g., the St. Louis Board of Examiners reviews applications at its monthly board meetings) |
| Licensing authority | Illinois Department of Public Health (IDPH) — Plumbing Program | No state plumbing board — the Missouri Division of Professional Registration does not license plumbers; licensing is local (e.g., St. Louis Board of Examiners of Plumbers and Drainlayers) |
The destination column is what you must satisfy — Missouri sets the rules for this move.
Step by step
- Review Missouri's initial-licensure requirements on the No state plumbing board — the Missouri Division of Professional Registration does not license plumbers; licensing is local (e.g., St. Louis Board of Examiners of Plumbers and Drainlayers) website (linked below).
- Expect to meet Missouri's education/experience requirements and pass its required exams — prior out-of-state licensure may still count toward experience.
- Submit the standard (new applicant) application with fees (No state fee — plumber licensing fees are set by each local jurisdiction and vary; consult the specific city or county board).
- Allow No statewide process; timelines are set by each local board (e.g., the St. Louis Board of Examiners reviews applications at its monthly board meetings).
Official links
Related guides
Frequently asked questions
Does Missouri accept a Illinois plumbing license?
No — Missouri has no reciprocity or endorsement path for Illinois plumbing license holders. You must apply to the No state plumbing board — the Missouri Division of Professional Registration does not license plumbers; licensing is local (e.g., St. Louis Board of Examiners of Plumbers and Drainlayers) as a new applicant and meet Missouri's full licensing requirements, including its exams.
Which exam applies moving from Illinois to Missouri?
Not applicable — Missouri issues no state-level plumber license; each city or county board of examiners sets its own examination, so there is no statewide credential to transfer and no state exam to waive.
What does the Illinois-to-Missouri move cost and how long does it take?
No state fee — plumber licensing fees are set by each local jurisdiction and vary; consult the specific city or county board; processing No statewide process; timelines are set by each local board (e.g., the St. Louis Board of Examiners reviews applications at its monthly board meetings).
Can I keep my Illinois plumbing license after I'm licensed in Missouri?
Yes — plumbing licenses in different jurisdictions run independently. Keep the Illinois credential active on its own renewal and continuing-education schedule and you hold both, which is common for plumbers working near a state line.
Sources
Primary sources only — official boards and compact commissions. Data last verified 2026-07-21.
- Missouri Division of Professional Registration — Listing of Professions (plumber is not among the state-licensed professions) ↗ (accessed 2026-07-21)
- City of St. Louis — Plumbers and Drainlayers, Board of Examiners (representative local licensing/examination) ↗ (accessed 2026-07-21)
- Illinois DPH — Application for Examination for Plumber's License (fees $175 in-state / $225 out-of-state; out-of-state section; 4-year 225 ILCS 320/10(d) requirement) ↗ (accessed 2026-07-21)
- Illinois DPH — Application for Plumber's License Reciprocity with the City of Chicago License Without Examination ($150 fee) ↗ (accessed 2026-07-21)
- 68 Ill. Adm. Code 750.1100 — Plumbers' and Apprentice Plumbers' Examination and Licensure Fees (Legal Information Institute) ↗ (accessed 2026-07-21)
- Illinois DPH — Plumbing program (license types, license verification link) ↗ (accessed 2026-07-21)
Reviewed by Billy Reiner, Editor · verified against primary sources 2026-07-21
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