Thinking about a stable, in-demand career that pays well and lets you solve real-world problems? How to become a licensed plumber in Minnesota is a common question for those entering the skilled trades—and for good reason. Plumbing isn’t just about fixing leaks; it’s a licensed profession with clear pathways, strong job security, and excellent earning potential. In this guide, we’ll walk you through every step—from apprenticeship to licensure—with actionable advice, official resources, and insider tips to help you succeed.
What Are the Basic Requirements to Become a Plumber in Minnesota?
Before you pick up a wrench, Minnesota sets specific eligibility criteria. To begin your journey as a licensed plumber, you must:
- Be at least 17 years old to register as an apprentice.
- Have a high school diploma or GED.
- Be legally authorized to work in the U.S.
- Register with the Minnesota Department of Labor and Industry (DLI) as a plumbing apprentice.
Note: Minnesota does not require a state-wide journeyman license, but licensure is mandatory at the local (city or county) level—most notably in the Twin Cities metro area, including Minneapolis and St. Paul.
💡 Pro Tip: Always check your local municipality’s rules. For example, the City of Minneapolis requires both journeyman and master plumber licenses, while rural areas may have fewer restrictions.
Step-by-Step: How to Become a Licensed Plumber in Minnesota
1. Complete a Plumbing Apprenticeship (4–5 Years)
The backbone of plumbing training in Minnesota is a registered apprenticeship approved by the DLI. Most programs combine:
- On-the-job training: 6,000–8,000 hours (typically 4–5 years) under a licensed master plumber.
- Classroom instruction: 500–1,000 hours covering plumbing code, safety, blueprint reading, and math.
Top apprenticeship sponsors include:
- UA Local 34 (United Association of Plumbers & Pipefitters)
- Minnesota Pipe Trades Association
- Independent contractors registered with DLI
📊 Did You Know? According to the U.S. Bureau of Labor Statistics (2024), plumbers in Minnesota earn a median annual wage of $62,500, with top earners making over $90,000—especially in licensed metro areas.
2. Track and Submit Your Hours
Keep meticulous records of your work hours. The DLI requires signed time sheets from your supervising plumber. Many apprentices use the DLI’s online portal to log hours in real time.
3. Apply for a Journeyman License (If Required Locally)
While Minnesota doesn’t issue a state journeyman license, cities like Minneapolis and St. Paul do. To qualify in Minneapolis, for example, you need:
- 4 years (7,000 hours) of plumbing experience
- Proof of 500 hours of classroom instruction
- A passing score on the Minneapolis Journeyman Plumbing Exam
📌 Exam Details: The test covers the Minnesota Plumbing Code (based on the Uniform Plumbing Code) and local amendments. Study materials are available through DLI and local trade schools.
4. Pass the Licensing Exam
Most local exams consist of:
- 100–120 multiple-choice questions
- 4-hour time limit
- 70% passing score
Common topics:
- Drainage, venting, and fixture installation
- Water supply systems
- Backflow prevention
- Gas piping (if applicable)
5. Obtain Your License and Renew It
Once you pass, pay the licensing fee (typically $100–$200) and receive your wallet card. Licenses usually renew every 1–2 years and may require continuing education (CE) hours—especially in larger cities.
Plumbing License Types in Minnesota
| License Type | Issued By | Experience Required | Scope of Work |
|---|---|---|---|
| Apprentice | State (DLI) | None (entry-level) | Work under direct supervision |
| Journeyman | Local City (e.g., Minneapolis) | 4+ years | Install, repair, inspect plumbing systems |
| Master Plumber | Local City | 1+ year as journeyman | Pull permits, supervise teams, own a business |
🔗 For more on plumbing codes and standards, see the Uniform Plumbing Code overview on Wikipedia.
How Long Does It Take to Get Licensed?
On average:
- Apprenticeship: 4–5 years
- Journeyman exam prep: 1–3 months
- Licensing processing: 2–6 weeks
So, from day one to holding a journeyman license in cities like Minneapolis: about 4.5 years.
But here’s the good news: You earn while you learn. Most apprentices start at $20–$25/hour, with wages increasing each year.
Costs Involved
| Expense | Estimated Cost |
|---|---|
| Apprenticeship Registration | $50–$100 (DLI) |
| Trade School Tuition | $0–$5,000* |
| Exam Fees | $100–$200 |
| License Application | $100–$250 |
| Tools & Safety Gear | $500–$1,000 |
*Many union programs offer free or low-cost training in exchange for work commitments.
Career Outlook for Plumbers in Minnesota
Plumbing isn’t going out of style. In fact, the Minnesota Department of Employment and Economic Development (DEED) projects 11% job growth for plumbers through 2030—faster than average.
Why?
- Aging infrastructure needs upgrades
- New construction in the Twin Cities
- Strict licensing ensures only qualified pros work
Plus, licensed plumbers can:
- Start their own businesses
- Specialize in green plumbing or medical gas
- Earn union benefits (healthcare, retirement)
FAQ Section
Q: Do I need a state plumbing license in Minnesota?
A: No. Minnesota does not issue a statewide plumbing license. However, most cities and counties require local licensure to legally work on plumbing systems. Always check with your local building department.
Q: Can I work as a plumber without a license in rural Minnesota?
A: In some unincorporated areas, licensing may not be enforced—but you still can’t pull permits or sign off on inspections without proper credentials. Working unlicensed risks fines and limits job opportunities.
Q: How much does a plumbing apprentice make in Minnesota?
A: As of 2025, first-year apprentices earn $20–$25/hour. By year 4 or 5, wages often reach $35–$40/hour, plus benefits in union programs.
Q: Can I transfer a plumbing license from another state to Minnesota?
A: Minnesota doesn’t have reciprocity, but cities like Minneapolis may accept out-of-state experience if you meet their hour and exam requirements. You’ll still need to pass the local exam.
Q: What’s the difference between a journeyman and master plumber in Minnesota?
A: A journeyman can install and repair systems but must work under a master’s permit. A master plumber can design systems, pull permits, supervise teams, and run a licensed plumbing business.
Q: Are there plumbing schools in Minnesota?
A: Yes! Options include:
- Dunwoody College of Technology (Minneapolis)
- Lake Area Technical College
- Hennepin Technical College
Many also partner with apprenticeship programs for blended learning.
Conclusion
Now you know exactly how to become a licensed plumber in Minnesota—from apprenticeship to earning your master credentials in major cities. It’s a career built on skill, integrity, and service, with strong demand and excellent pay. Whether you’re a high school grad, career changer, or military veteran, plumbing offers a clear, respected path forward.
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Your future as a licensed Minnesota plumber starts today—one pipe at a time.
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