Plumber License from Illinois to Ohio: Does It Transfer? (2026)
Last verified: 2026-07-21 · source: Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce, Division of Industrial Compliance ↗
A plumbing license transfers from Illinois to Ohio by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce, Division of Industrial Compliance, verify your Illinois license, and meet Ohio's endorsement requirements. Ohio waives its OCILB plumbing trade exam only for applicants who currently hold a South Carolina or West Virginia plumbing license obtained by examination (not by grandfathering or reciprocity); an out-of-state licensee who instead got their license by grandfathering or reciprocity must take both the Ohio plumbing exam and the Ohio Business and Law exam, and every other applicant must qualify with five years of trade experience and pass the Ohio plumbing exam.
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Verdict
Licensure by endorsement
Illinois is not among the states Ohio names for an automatic exam waiver, so this move runs on the Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce, Division of Industrial Compliance's individual endorsement or equivalency review rather than a guarantee. Ohio waives its OCILB plumbing trade exam only for applicants who currently hold a South Carolina or West Virginia plumbing license obtained by examination (not by grandfathering or reciprocity); an out-of-state licensee who instead got their license by grandfathering or reciprocity must take both the Ohio plumbing exam and the Ohio Business and Law exam, and every other applicant must qualify with five years of trade experience and pass the Ohio plumbing exam. Bring your Illinois license, proof that it is active and in good standing, and your apprenticeship and exam records — and get any discretionary exam or experience credit in writing before you rely on it.
What changes, Illinois → Ohio
| Illinois (current) | Ohio (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) | $25 ($25.00 non-refundable reciprocity application fee per trade; proof of at least $500,000 contractor liability insurance required. Non-reciprocal applicants pay a $25 exam application fee plus BCI and FBI background-check costs.) |
| Processing time | No board-stated processing time; the examination application is due at least 30 days before the examination date | No board-stated processing time; reciprocity applications are approved or denied by board review. |
| Licensing authority | Illinois Department of Public Health (IDPH) — Plumbing Program | Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce, Division of Industrial Compliance |
The destination column is what you must satisfy — Ohio sets the rules for this move.
Step by step
- Confirm Ohio's current requirements on the Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce, Division of Industrial Compliance website (linked below) — rules change.
- Submit the endorsement application to the Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce, Division of Industrial Compliance (application linked below).
- Arrange license verification from your current state via the verification system.
- Hold a current South Carolina or West Virginia plumbing license issued by examination and in good standing (West Virginia applicants must hold both a WV Master Plumber and a WV Contractor license).
- Submit a Reciprocity Verification of Licensure form certified with the originating state board's seal and exam score.
- Carry contractor liability insurance of at least $500,000.
- Assign the Ohio license to a registered contracting company (ORC 4740.01).
- Pay the fees ($25 ($25.00 non-refundable reciprocity application fee per trade; proof of at least $500,000 contractor liability insurance required. Non-reciprocal applicants pay a $25 exam application fee plus BCI and FBI background-check costs.)) and allow No board-stated processing time; reciprocity applications are approved or denied by board review..
Official links
Related guides
Frequently asked questions
Does Ohio accept a Illinois plumbing license?
A plumbing license transfers from Illinois to Ohio by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Ohio Construction Industry Licensing Board (OCILB) — Ohio Department of Commerce, Division of Industrial Compliance, verify your Illinois license, and meet Ohio's endorsement requirements. Ohio waives its OCILB plumbing trade exam only for applicants who currently hold a South Carolina or West Virginia plumbing license obtained by examination (not by grandfathering or reciprocity); an out-of-state licensee who instead got their license by grandfathering or reciprocity must take both the Ohio plumbing exam and the Ohio Business and Law exam, and every other applicant must qualify with five years of trade experience and pass the Ohio plumbing exam.
Which exam applies moving from Illinois to Ohio?
Ohio waives its OCILB plumbing trade exam only for applicants who currently hold a South Carolina or West Virginia plumbing license obtained by examination (not by grandfathering or reciprocity); an out-of-state licensee who instead got their license by grandfathering or reciprocity must take both the Ohio plumbing exam and the Ohio Business and Law exam, and every other applicant must qualify with five years of trade experience and pass the Ohio plumbing exam.
What does the Illinois-to-Ohio move cost and how long does it take?
$25 ($25.00 non-refundable reciprocity application fee per trade; proof of at least $500,000 contractor liability insurance required. Non-reciprocal applicants pay a $25 exam application fee plus BCI and FBI background-check costs.); processing No board-stated processing time; reciprocity applications are approved or denied by board review..
Can I keep my Illinois plumbing license after I'm licensed in Ohio?
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.
- OCILB Examination Application (state commercial plumbing contractor license; $25 fee; five-year experience; trades include Plumbing) ↗ (accessed 2026-07-21)
- OCILB South Carolina Reciprocity Application (PL trade; exam waived for tested SC licensees; $25 per trade) ↗ (accessed 2026-07-21)
- OCILB West Virginia Mechanical Reciprocity Application (PL trade; must hold WV Master Plumber + WV Contractor license, tested not grandfathered) ↗ (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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