Minnesota Plumber Reciprocity

Minnesota's Reciprocity Is Narrow

Minnesota does not have universal or automatic reciprocity with other states. The only formal exam-free transfer agreements are with North Dakota and South Dakota. Every other state requires the applicant to take the Minnesota exam.

This surprises plumbers moving from states with broader reciprocity networks. A Wisconsin journeyman, an Iowa master, a Montana contractor — all must apply and test as if they were Minnesota-based candidates.

North Dakota and South Dakota Agreement Rules

Even the ND/SD reciprocity comes with conditions:

Exam-based license required. Your North Dakota or South Dakota license must have been obtained by passing a written, state-level examination. Licenses earned through municipal exams, local grandfathering, or prior reciprocal agreements with other states don't qualify.

One-year active holding period. You must have held the out-of-state license in active, good standing for at least one full year immediately before applying to Minnesota.

Same-tier transfer. A South Dakota journeyman transfers as a Minnesota journeyman. A North Dakota master transfers as a Minnesota master. There's no cross-tier upgrade through reciprocity.

If you meet all three conditions, you can apply for the Minnesota equivalent without sitting the exam. The application still goes through the DLI iMS portal with the appropriate fees.

Coming From a Non-Reciprocal State

For plumbers from the other 48 states (plus DC), the process is:

1. Apply for the Minnesota exam through the iMS portal
2. Submit experience verification — the DLI will evaluate your out-of-state credentials
3. Pass the exam (70% threshold, Prometric testing centers)
4. Activate your license with the standard fee

The critical limitation: the DLI caps automatic non-licensed out-of-state experience credit at two years (3,500 hours). To claim these hours, you need either a state-endorsed verification letter from the regulating agency in your previous state, or a signed and notarized letter from your out-of-state supervising master plumber with dates, category breakdowns, and total hours.

If you held an active license in the other state (not just worked as an apprentice there), the evaluation is more favorable — the DLI assesses whether that state's licensing standards are equivalent to Minnesota's four-year experience and state-level exam requirements.

The Two-Year Lapse Trap

This rule applies to everyone, including reciprocity transfers: if you let a Minnesota plumber license lapse for more than two years, you forfeit renewal rights entirely. You'd need to submit a fresh initial application and retake the exam. For someone who transferred from North Dakota without testing, this means actually sitting the Minnesota exam for the first time.

Minneapolis and St. Paul Add Another Step

An out-of-state transfer who plans to work in Minneapolis or St. Paul will also need a local Certificate of Competency ("Comp Card"). The two cities maintain their own competency requirements at both the journeyman and master levels, with a reciprocal agreement between them — get one city's card and the other is available without re-examination.

The Minnesota Plumber License Guide details the complete out-of-state application sequence, including the experience verification documentation the DLI requires and the local Comp Card process.

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