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How much experience do you need in Minnesota?
4 years of practical plumbing experience as an apprentice or registered unlicensed individual (up to 24 months of earlier experience can count)2
Keep your own record of hours, employers and pay stubs. DLI can ask for proof when you apply.
What is the Minnesota plumber exam like?
You take the state exam once the board approves your hours. Written exam developed and administered by the Department of Labor and Industry (DLI).1
How much does the plumber license cost?
Application and exam: $50; journeyworker license: $40 base for a two-year license plus an $8 board fee; master license: $80 base for a two-year license plus an $8 board fee3
How do you renew it?
Two-year licenses: journeyworker licenses expire December 31 of odd-numbered years, master licenses December 31 of even-numbered years.1 Continuing education: 16 hours every two years: at least 8 on the State Plumbing Code and at least 8 on technical topics.4
License levels in Minnesota
Unlicensed individual (plumber's apprentice); Journeyworker Plumber; Master Plumber; Plumbing Contractor (business).
Applications, exam booking and hour forms are on DLI's site.
More for plumbers in Minnesota
Sources
- Minnesota Department of Labor and Industry (DLI), with the Plumbing Board: exam (revisor.mn.gov, 2026-10-27)
- Minnesota Department of Labor and Industry (DLI), with the Plumbing Board: experience (revisor.mn.gov, 2026-10-28)
- Minnesota Department of Labor and Industry (DLI), with the Plumbing Board: fees (revisor.mn.gov, 2026-10-27)
- Minnesota Department of Labor and Industry (DLI), with the Plumbing Board: continuing education (dli.mn.gov, 2026-10-27)
- Minnesota Department of Labor and Industry (DLI), with the Plumbing Board: licensing (revisor.mn.gov, 2026-10-27)