Plumber License from Illinois to Maryland: Does It Transfer? (2026)
Last verified: 2026-07-21 · source: Maryland State Board of Plumbing (Maryland Department of Labor, Division of Occupational and Professional Licensing) ↗
A plumbing license transfers from Illinois to Maryland by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Maryland State Board of Plumbing (Maryland Department of Labor, Division of Occupational and Professional Licensing), verify your Illinois license, and meet Maryland's endorsement requirements. Maryland waives its journey plumber examination only for applicants already licensed by examination as a journey plumber/gas fitter in Washington, D.C. (and, at the master level only, in Delaware), plus its own intrastate jurisdictions of Baltimore County and the Washington Suburban Sanitary Commission (WSSC); reciprocity is granted only where that jurisdiction reciprocally waives its exam for Maryland licensees. Every other out-of-state plumber must pass the Maryland journey plumber/gas fitter examination as a new applicant..
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Verdict
Licensure by endorsement
Illinois is not among the states Maryland names for an automatic exam waiver, so this move runs on the Maryland State Board of Plumbing (Maryland Department of Labor, Division of Occupational and Professional Licensing)'s individual endorsement or equivalency review rather than a guarantee. Maryland waives its journey plumber examination only for applicants already licensed by examination as a journey plumber/gas fitter in Washington, D.C. (and, at the master level only, in Delaware), plus its own intrastate jurisdictions of Baltimore County and the Washington Suburban Sanitary Commission (WSSC); reciprocity is granted only where that jurisdiction reciprocally waives its exam for Maryland licensees. Every other out-of-state plumber must pass the Maryland journey plumber/gas fitter examination as a new applicant.. 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 → Maryland
| Illinois (current) | Maryland (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) | $43.5 (Journey Plumber/Gas Fitter original license fee is $43.50; the board publishes no separate reciprocity application fee, so reciprocal applicants pay the license fee. No fingerprint/background surcharge is listed.) |
| Processing time | No board-stated processing time; the examination application is due at least 30 days before the examination date | ~2 weeks (Board FAQ states a license is mailed within about two weeks of applying; this is stated for original licenses and reciprocal processing time is not separately specified.) |
| Licensing authority | Illinois Department of Public Health (IDPH) — Plumbing Program | Maryland State Board of Plumbing (Maryland Department of Labor, Division of Occupational and Professional Licensing) |
The destination column is what you must satisfy — Maryland sets the rules for this move.
Step by step
- Confirm Maryland's current requirements on the Maryland State Board of Plumbing (Maryland Department of Labor, Division of Occupational and Professional Licensing) website (linked below) — rules change.
- Submit the endorsement application to the Maryland State Board of Plumbing (Maryland Department of Labor, Division of Occupational and Professional Licensing) (application linked below).
- Arrange license verification from your current state via the verification system.
- Hold a current journey plumber/gas fitter license obtained by examination in Washington, D.C., Baltimore County, or WSSC, in good standing.
- For Baltimore County or WSSC reciprocity, hold BOTH the plumbing and the gas portion of the license.
- Submit a license verification letter from the issuing jurisdiction.
- Hold current backflow prevention device certification.
- New-applicant journey path (if no reciprocity): 4 years as a licensed apprentice, 7,500 hours OJT under a master plumber, 32-hour backflow course, and pass the exam.
- Pay the fees ($43.5 (Journey Plumber/Gas Fitter original license fee is $43.50; the board publishes no separate reciprocity application fee, so reciprocal applicants pay the license fee. No fingerprint/background surcharge is listed.)) and allow ~2 weeks (Board FAQ states a license is mailed within about two weeks of applying; this is stated for original licenses and reciprocal processing time is not separately specified.).
Official links
Related guides
Frequently asked questions
Does Maryland accept a Illinois plumbing license?
A plumbing license transfers from Illinois to Maryland by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Maryland State Board of Plumbing (Maryland Department of Labor, Division of Occupational and Professional Licensing), verify your Illinois license, and meet Maryland's endorsement requirements. Maryland waives its journey plumber examination only for applicants already licensed by examination as a journey plumber/gas fitter in Washington, D.C. (and, at the master level only, in Delaware), plus its own intrastate jurisdictions of Baltimore County and the Washington Suburban Sanitary Commission (WSSC); reciprocity is granted only where that jurisdiction reciprocally waives its exam for Maryland licensees. Every other out-of-state plumber must pass the Maryland journey plumber/gas fitter examination as a new applicant..
Which exam applies moving from Illinois to Maryland?
Maryland waives its journey plumber examination only for applicants already licensed by examination as a journey plumber/gas fitter in Washington, D.C. (and, at the master level only, in Delaware), plus its own intrastate jurisdictions of Baltimore County and the Washington Suburban Sanitary Commission (WSSC); reciprocity is granted only where that jurisdiction reciprocally waives its exam for Maryland licensees. Every other out-of-state plumber must pass the Maryland journey plumber/gas fitter examination as a new applicant..
What does the Illinois-to-Maryland move cost and how long does it take?
$43.5 (Journey Plumber/Gas Fitter original license fee is $43.50; the board publishes no separate reciprocity application fee, so reciprocal applicants pay the license fee. No fingerprint/background surcharge is listed.); processing ~2 weeks (Board FAQ states a license is mailed within about two weeks of applying; this is stated for original licenses and reciprocal processing time is not separately specified.).
Can I keep my Illinois plumbing license after I'm licensed in Maryland?
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.
- Maryland Board of Plumbing — Reciprocal Licensing ↗ (accessed 2026-07-21)
- Maryland Board of Plumbing — Forms and Fees ↗ (accessed 2026-07-21)
- Maryland Board of Plumbing — License Requirements ↗ (accessed 2026-07-21)
- Maryland Board of Plumbing — Licensing FAQs (processing time, verification) ↗ (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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