Plumber license requirements in Wisconsin.
Wisconsin licenses plumbers statewide through the Department of Safety and Professional Services. The route to journeyman runs through an approved apprenticeship, and the master license requires several years of licensed journeyman work with a minimum number of hours in each of them.
What Wisconsin requires.
Journeyman Plumber
Requires completing an approved plumbing apprenticeship. Out-of-state applicants need a five-year apprenticeship plus at least 576 hours of plumbing-related instruction.
Master Plumber
Requires at least three years working as a licensed Wisconsin journeyman plumber, with a minimum of 1,000 hours in each of those years.
Getting the Journeyman Plumber
- Journeyman: complete an approved Wisconsin plumbing apprenticeship — or, applying from out of state, a five-year apprenticeship with at least 576 hours of plumbing-related instruction
- Master: work at least three years as a licensed Wisconsin journeyman plumber, logging a minimum of 1,000 hours each year
Renewal: Continuing education must come from DSPS-approved providers, and code/law content is a required portion of it. Renewal cycles differ by license type — published figures vary between sources, so confirm your exact cycle, fee, and hour count with DSPS.
- · Sources disagree on the precise renewal period and CE hour count for each license type. The one consistent point is that hours must be DSPS-approved and include code/law content — check your credential’s renewal notice for the current numbers.
Verified 2026-08 against the sources below. Licensing rules change — confirm with the board before relying on this page.
Wisconsin plumbing licensing FAQ.
Do you need a license to do plumbing work in Wisconsin?
Yes. Wisconsin licenses plumbers statewide through the Department of Safety and Professional Services, with journeyman and master credentials built on apprenticeship and documented licensed experience.
How do you become a journeyman plumber in Wisconsin?
Complete an approved Wisconsin plumbing apprenticeship. If you are applying from out of state, DSPS looks for a five-year apprenticeship plus at least 576 hours of plumbing-related instruction.
How do you become a master plumber in Wisconsin?
Work at least three years as a licensed Wisconsin journeyman plumber, with a minimum of 1,000 hours in each of those years, then apply through DSPS.
What continuing education do Wisconsin plumbers need?
CE has to come from DSPS-approved providers and must include code and law content. Published hour counts and renewal periods vary between sources by license type, so confirm the current requirement directly with DSPS before you renew.
WI plumbers lose more jobs to slow replies than to competitors.
Emergency calls come in while you’re elbow-deep in a repair — and roll to voicemail.
Quote requests go quiet because the follow-up text never got sent.
Repeat customers drift: nobody reminds them about the water heater you flagged last year.
Oski answers the “can you come today?” text in about a minute, follows up on every quote, and asks for the review while the fix is still fresh.
14 days free · Setup in about 15 minutes · Cancel anytime
More for plumbers
Stop losing leads while you’re busy working.
Give yourself a front desk for the next 14 days — and decide for yourself if it’s worth keeping.
14 days free · Setup in about 15 minutes · Cancel anytime