The essentials
- Licensing authorityIowa Plumbing and Mechanical Systems Board (PMSB), Department of Inspections, Appeals, and Licensing (DIAL) — official site
- Statewide?Yes — Iowa licenses at the state level
- Experience requiredJourneyperson: evidence of at least four years of practical experience as an apprentice. Since January 1, 2010, that experience must come from an apprenticeship training program registered with the U.S. Department of Labor Office of Apprenticeship. Master: a journeyperson license plus two additional years of work experience. Applicants must be at least 18.
- ExamKirkwood Community College is the board's approved testing provider, administering exams at sites across Iowa. Candidates first file an Exam Approval Application with the board ($35 per trade discipline, allow up to two weeks), then pay the exam fee directly to Kirkwood.
- Renewal & CEThree-year license term. PMSB licenses expire June 30 but remain valid through August 31 — renewing in July avoids late fees. At least 8 hours of board-approved classroom instruction are required during each three-year term for a single license (2 hours safety, 2 hours code, 4 hours in the license discipline); holders of both plumbing and mechanical licenses must complete 16 hours. Both the course and the instructor must be pre-approved by the board.
- Bond / insuranceNot published in a form we could verify — confirm with the board
- ReciprocityNone we could confirm
License classes in Iowa
Iowa issues the following classes. Getting the class right matters — several states have residential-only or limited-scope licenses that will not cover commercial or multifamily work:
- Apprentice — registered while completing a U.S. DOL-registered apprenticeship program
- Journeyperson Plumber — individual license to perform plumbing work
- Master Plumber — advanced individual license; may serve as the 'master of record' for a contractor
- Contractor — business license, which must be backed by a master of record
- Specialty licenses — including disconnect/reconnect plumbing technician, hearth systems, medical gas piping certification, and private school/college routine maintenance
Experience and training
Journeyperson: evidence of at least four years of practical experience as an apprentice. Since January 1, 2010, that experience must come from an apprenticeship training program registered with the U.S. Department of Labor Office of Apprenticeship. Master: a journeyperson license plus two additional years of work experience. Applicants must be at least 18.
One thing worth knowing regardless of state: the hours only count if they were logged properly at the time. Several boards require you to register as an apprentice before the clock starts, and hours worked while unregistered are simply gone. If you are early in the trade, get the registration paperwork right now rather than reconstructing it four years later.
The exam
Kirkwood Community College is the board's approved testing provider, administering exams at sites across Iowa. Candidates first file an Exam Approval Application with the board ($35 per trade discipline, allow up to two weeks), then pay the exam fee directly to Kirkwood.
Renewal and continuing education
Three-year license term. PMSB licenses expire June 30 but remain valid through August 31 — renewing in July avoids late fees. At least 8 hours of board-approved classroom instruction are required during each three-year term for a single license (2 hours safety, 2 hours code, 4 hours in the license discipline); holders of both plumbing and mechanical licenses must complete 16 hours. Both the course and the instructor must be pre-approved by the board.
Letting a license lapse is more expensive than it looks. Some states allow a short grace period with a penalty fee; others treat a lapsed license as forfeited and make you retest from scratch. Put the renewal date in your calendar with a 90-day warning, not a 7-day one.
Insurance and bonding
We could not verify a published state bond or insurance minimum for Iowa. That does not mean you should work uninsured — local permit offices, general contractors and property managers routinely require a certificate regardless of what the state demands.
Separately from whatever the state requires: Pipe Well requires every plumber on the network to carry current general liability insurance and to upload the certificate before the first appointment is sent.
Working across state lines
We could not confirm any published reciprocity agreement for Iowa. That does not always mean there is none — several states evaluate out-of-state licenses case by case, or let you sit for the exam on the strength of a license held elsewhere. If you are relocating, call the board and ask specifically about endorsement or credential review rather than assuming you start over.
What plumbers actually get wrong here
The apprenticeship rule is the single biggest obstacle for Iowa applicants: since 2010 the four years must come from a U.S. DOL Office of Apprenticeship registered program, so informal on-the-job time under a licensed plumber — which many other states accept — does not count toward the journeyperson exam. Iowa also runs plumbing and mechanical (HVAC) licensing through one board, so anyone holding both disciplines owes 16 CE hours per three-year term instead of 8, and the discipline-specific hours cannot be shared. Exams go through Kirkwood Community College rather than a national vendor, and you must be approved by the board before Kirkwood will schedule you. The June 30 expiration with an August 31 grace period is a well-known trap — the license is technically expired in July and August even though you can still renew. Iowa does maintain reciprocity/endorsement arrangements with certain neighboring states; confirm the current list with PMSB before assuming yours qualifies.
Once you are licensed: getting the work
A license gets you legal. It does not get you a full schedule. The usual next step is buying leads — $40 to $85 for a contact that three or four other shops bought at the same moment, which at a realistic 10–20% close rate works out to somewhere between $300 and $1,000 for every job you actually book, plus the unpaid hours spent chasing the ones that go nowhere.
Pipe Well works the other way round. We book appointments, not leads, and we handle everything up to the moment you knock on the door: the advertising, the phone call, qualifying the job, getting the address and access details, and agreeing a date and time window with the homeowner. What reaches your phone is a scheduled appointment — name, address, time window and what is wrong. You reply YES and it is yours.
What it costs
Nothing to join. No subscription, no per-lead charge. You do the job, you set your own price, and you collect payment from the customer directly. Then Pipe Well is paid 50% of the job after your documented materials come off the top:
(amount collected − documented materials) × 50%
| Collected | Materials | Net | Pipe Well | You keep |
|---|---|---|---|---|
| $400 | $40 | $360 | $180 | $220 |
| $1,200 | $520 | $680 | $340 | $860 |
| $2,800 | $800 | $2,000 | $1,000 | $1,800 |
| $8,500 | $3,200 | $5,300 | $2,650 | $5,850 |
Due within 48 hours of the customer paying you. If they never pay, you owe nothing. And look honestly at that last row — on a big repipe our share is a large number. If your book is already full of $8,500 jobs you are better off filling that capacity yourself. We are worth most to a shop with open capacity it cannot currently fill.
Apply free → Run your own numbersQuestions plumbers ask about licensing in Iowa
Do you need a license to do plumbing work in Iowa?
Yes. Iowa Plumbing and Mechanical Systems Board (PMSB), Department of Inspections, Appeals, and Licensing (DIAL) is the licensing authority for Iowa. The apprenticeship rule is the single biggest obstacle for Iowa applicants: since 2010 the four years must come from a U.S. DOL Office of Apprenticeship registered program, so informal on-the-job time under a licensed plumber — which many other states accept — does not count toward the journeyperson exam. Iowa also runs plumbing and mechanical (HVAC) licensing through one board, so anyone holding both disciplines owes 16 CE hours per three-year term instead of 8, and the discipline-specific hours cannot be shared. Exams go through Kirkwood Community College rather than a national vendor, and you must be approved by the board before Kirkwood will schedule you. The June 30 expiration with an August 31 grace period is a well-known trap — the license is technically expired in July and August even though you can still renew. Iowa does maintain reciprocity/endorsement arrangements with certain neighboring states; confirm the current list with PMSB before assuming yours qualifies.
Who issues the plumbing license in Iowa?
Iowa Plumbing and Mechanical Systems Board (PMSB), Department of Inspections, Appeals, and Licensing (DIAL). The official site is https://dial.iowa.gov/licenses/building/plumbing-mechanical/plumbing-licensure.
What license classes exist in Iowa?
Apprentice — registered while completing a U.S. DOL-registered apprenticeship program. Journeyperson Plumber — individual license to perform plumbing work. Master Plumber — advanced individual license; may serve as the 'master of record' for a contractor. Contractor — business license, which must be backed by a master of record. Specialty licenses — including disconnect/reconnect plumbing technician, hearth systems, medical gas piping certification, and private school/college routine maintenance.
How many hours of experience do you need for a Iowa plumbing license?
Journeyperson: evidence of at least four years of practical experience as an apprentice. Since January 1, 2010, that experience must come from an apprenticeship training program registered with the U.S. Department of Labor Office of Apprenticeship. Master: a journeyperson license plus two additional years of work experience. Applicants must be at least 18.
Who administers the Iowa plumbing exam?
Kirkwood Community College is the board's approved testing provider, administering exams at sites across Iowa. Candidates first file an Exam Approval Application with the board ($35 per trade discipline, allow up to two weeks), then pay the exam fee directly to Kirkwood.
How often does a Iowa plumbing license renew?
Three-year license term. PMSB licenses expire June 30 but remain valid through August 31 — renewing in July avoids late fees. At least 8 hours of board-approved classroom instruction are required during each three-year term for a single license (2 hours safety, 2 hours code, 4 hours in the license discipline); holders of both plumbing and mechanical licenses must complete 16 hours. Both the course and the instructor must be pre-approved by the board.
Can I get booked plumbing appointments in Iowa once I am licensed?
Yes. Pipe Well Plumbing books customer appointments in Iowa and texts them to licensed plumbers whose service radius covers the address. Joining is free — no subscription and no per-lead fee. Pipe Well is paid 50% of the job after your documented material costs are deducted, and only after the customer has paid you.
Booked appointments in Iowa
Set your ZIP and a service radius of at least 30 miles and we will match appointments inside it. Free to join.
Join Free → Plumbing jobs in IowaPlumbing license requirements in other states
Compiled from Iowa Plumbing and Mechanical Systems Board (PMSB), Department of Inspections, Appeals, and Licensing (DIAL) published materials, last reviewed July 2026. Where a figure could not be verified against a primary source we have said so rather than estimate it. Spotted something out of date? Email info@pipewellplumbing.com and we will correct it.