Requirements, license levels, and the issuing authority, sourced from Minnesota's official board.
The four years must be RECORDED, which is the single most consequential administrative fact for a Minnesota plumber. Register with DLI as an unlicensed plumber on the first day in the trade; the alternative is arriving at year four with time that the department cannot verify.
| Requirements | JOURNEYWORKER PLUMBER, TWO QUALIFYING ROUTES, AND BOTH RUN THROUGH DLI REGISTRATION. Either at least FOUR YEARS of RECORDED practical plumbing experience as a DLI-REGISTERED UNLICENSED PLUMBER, or completion of a DLI-REGISTERED APPRENTICESHIP PROGRAMME. The word doing the work in both routes is REGISTERED. Minnesota counts experience it has a record of; time worked in plumbing without the DLI registration is not recorded experience and is hard to evidence afterwards. Register first, then serve the time. A written examination must be passed BEFORE applying for the license. MASTER PLUMBER sits above the journeyworker, and a PLUMBING CONTRACTOR license is the separate business credential needed to contract. |
| Reciprocity | DLI reviews out-of-state plumbing experience against its four-year recorded-experience standard rather than applying an automatic reciprocity list. A plumber licensed elsewhere should expect an individual assessment of the documentation. |
| Renewal | Personal licenses run TWO YEARS, expiring on the anniversary of initial issue. Renewal requires all three of: TWO HOURS of DLI-approved continuing education, a $19 RENEWAL FEE, and a completed WORK EXPERIENCE VERIFICATION FORM. That third item is unusual, Minnesota asks a license holder to keep evidencing that they are actually working in the trade, not merely to pay. |
| Notes | The four years must be RECORDED, which is the single most consequential administrative fact for a Minnesota plumber. Register with DLI as an unlicensed plumber on the first day in the trade; the alternative is arriving at year four with time that the department cannot verify. |
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Sources: www.dli.mn.gov, www.dli.mn.gov, www.dli.mn.gov, www.dli.mn.gov. Always confirm current requirements with the issuing authority.
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