How to get a plumbing license in Iowa: the official requirements
The Journeyperson Plumbing License license, the experience and training it takes, the exam and how to apply, from the Iowa Plumbing and Mechanical Systems Board.
In Iowa, the state plumbing license for individual plumbers is issued by the Iowa Plumbing and Mechanical Systems Board. The journeyperson plumbing license from the Iowa Plumbing and Mechanical Systems Board. No one may install or repair plumbing, mechanical, HVAC, refrigeration, sheet metal or hydronic systems without a Board license, and a journeyperson works under the supervision of a master licensed in the discipline. Apprentice or trainee registration: Apprentices must be enrolled in a U.S. Department of Labor registered apprenticeship program and hold the Board's apprentice license, which covers all plumbing and mechanical trades. You must be at least 18 with a high school diploma or GED, and you work only under a master or journeyperson. Experience and training: At least four years of practical experience as an apprentice; since January 1, 2010 it must come from an apprenticeship program registered by the U.S. Department of Labor Office of Apprenticeship, and you must have graduated from the program. Experience as a helper does not count. (A master license in the same discipline from another jurisdiction is the alternative route.) Licensing exam: The Iowa journeyperson examination for each trade discipline, given by the Board's approved provider, Kirkwood Community College, after you receive an Exam Approval Letter; approval lasts one year. Apprentices may apply to test up to 6 months before completing the 48 months of required apprentice credit. How to apply: First submit an Exam Approval Application (online or on paper). After passing, submit a post-examination licensure application; a license is not issued automatically. The license application is not processed until the U.S. Department of Labor certificate of completion has been issued.
Iowa plumbing license requirements
| Requirement | Iowa |
|---|---|
| License you apply for | The journeyperson plumbing license from the Iowa Plumbing and Mechanical Systems Board. No one may install or repair plumbing, mechanical, HVAC, refrigeration, sheet metal or hydronic systems without a Board license, and a journeyperson works under the supervision of a master licensed in the discipline. |
| Apprentice or trainee registration | Apprentices must be enrolled in a U.S. Department of Labor registered apprenticeship program and hold the Board's apprentice license, which covers all plumbing and mechanical trades. You must be at least 18 with a high school diploma or GED, and you work only under a master or journeyperson. |
| Experience and training | At least four years of practical experience as an apprentice; since January 1, 2010 it must come from an apprenticeship program registered by the U.S. Department of Labor Office of Apprenticeship, and you must have graduated from the program. Experience as a helper does not count. (A master license in the same discipline from another jurisdiction is the alternative route.) |
| Classroom hours | Not stated in the official source we read. Check with the Iowa Plumbing and Mechanical Systems Board. |
| Licensing exam | The Iowa journeyperson examination for each trade discipline, given by the Board's approved provider, Kirkwood Community College, after you receive an Exam Approval Letter; approval lasts one year. Apprentices may apply to test up to 6 months before completing the 48 months of required apprentice credit. |
| How to apply | First submit an Exam Approval Application (online or on paper). After passing, submit a post-examination licensure application; a license is not issued automatically. The license application is not processed until the U.S. Department of Labor certificate of completion has been issued. |
| Background check | You must be at least 18 and document any criminal convictions; applicants with a felony conviction are reviewed by the Board to decide eligibility. |
| State fees | Exam Approval Application: $35 per trade discipline exam. License fees are prorated by the length of the license period, and a $25 paper application fee applies if you do not apply online. The exam fee is paid separately to Kirkwood. |
| License term | Three years; Plumbing and Mechanical Systems Board licenses are issued for a three-year licensing period. |
| Continuing education | 8 hours of continuing education to renew a journeyperson plumbing license: 2 hours of plumbing code, 4 hours of plumbing discipline and 2 hours of safety; at least half must be in person. |
Where the official source we read does not state something, the table says so rather than guessing. Fees shown are the licensing authority's own. Fees charged by exam vendors, schools, apprenticeship programs, fingerprint vendors and application portals are not included.
This page covers the plumbing license issued by the state. Cities and counties can have their own registration, permit or license rules; ask the local building department where you will work.
How to get licensed in Iowa
- Enroll in a U.S. Department of Labor registered apprenticeship and get the Board's apprentice license.
- Complete at least four years of practical experience as an apprentice and graduate from the program.
- Submit an Exam Approval Application for the journeyperson plumbing exam with the $35 fee.
- Schedule and pass the exam with Kirkwood Community College within your one-year approval.
- Submit the post-examination licensure application to receive your journeyperson license.
- Complete 8 hours of continuing education each three-year license period to renew.
Go further
Requirements state by state.
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Questions people ask
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How this page is built
Each fact on this page comes from the Iowa Plumbing and Mechanical Systems Board and the rules it publishes (sources named below), read on the dates shown, with the exact wording we relied on kept on file. Requirements and fees change; the Iowa Plumbing and Mechanical Systems Board's current instructions govern. We re-read each state's sources every six months (next review by May 10, 2027).
- Not legal advice.
- Licensing rules can change. Verify current requirements with the issuing agency.
- Fees shown are the licensing authority's own. Fees charged by exam vendors, schools, apprenticeship programs, fingerprint vendors and application portals are not included.
- This page covers the plumbing license issued by the state. Cities and counties can have their own registration, permit or license rules; ask the local building department where you will work.
- This page covers the individual license named above. Master, contractor, specialty, residential, limited and out-of-state (reciprocity) licenses have their own rules.
- Iowa Department of Inspections, Appeals, and Licensing, Plumbing and Mechanical Systems Board: Journey Level License, official source, read Nov 9, 2026.
- Iowa Department of Inspections, Appeals, and Licensing, Plumbing and Mechanical Systems Board: Apprentice License, official source, read Nov 9, 2026.
- Iowa Department of Inspections, Appeals, and Licensing, Plumbing and Mechanical Systems Board: Examination, official source, read Nov 9, 2026.
- Iowa Department of Inspections, Appeals, and Licensing, Plumbing and Mechanical Systems Board: Post-Examination Licensure, official source, read Nov 9, 2026.
- Iowa Department of Inspections, Appeals, and Licensing, PMSB Continuing Education and Training, official source, read Nov 9, 2026.
- Iowa Code chapter 105, Plumbers, Mechanical Professionals, and Contractors (Iowa Legislature), official source, read Nov 9, 2026.