Plumber License Reciprocity by State (2026)

The pathways, applied to plumber

Named bilateral reciprocity (the journeyman-exam waiver)

The most common real agreement is a two-state deal: the destination board waives its own journeyman trade exam for a plumber who was licensed by examination in a specifically named partner state, usually a neighbor with a comparable exam. It is directional — your origin must be on the destination's list, and the reverse says nothing — and it is conditioned on your original license being active and in good standing, sometimes on your having held it for a minimum period. It waives the exam only; you still file the destination's application and pay its fees.

Endorsement and experience credit

Some boards publish no partner list but will still evaluate an out-of-state plumber individually, crediting a comparable exam or documented years of experience toward licensure short of a fresh apprenticeship. A handful license by equivalency instead — comparing your home state's standards and experience requirements to their own and licensing you if they match. The paperwork resembles reciprocity; the certainty does not, because the credit is discretionary. Where a state works this way, its page states exactly what the board has committed to in writing.

Qualify as a new applicant (no agreement)

Where no agreement or endorsement covers your origin state, an out-of-state plumber qualifies from the same starting line as a local one: document the required apprenticeship years or on-the-job training hours, then pass the destination state's journeyman exam. Your existing license does not shorten the checklist, but the hours you have already logged usually count toward the experience requirement — so bring your certified license history and employment records.

States with no statewide license

A distinct group issues no state-level journeyman license, in two flavors. In some, plumbing is licensed only at the contractor level: the state licenses the plumbing contractor or company, and individual journeymen work under that license rather than holding one of their own. In others, licensing is devolved entirely to cities and counties, each running its own exam and often declining to recognize outside licenses. Either way there is no state credential to reciprocate — you meet the contractor board's or the specific municipality's rules, and a license issued there rarely satisfies another state's "licensed by examination at the state level" condition.

This map tracks the journeyman (journeyworker) license, the canonical credential in the trade. The master tier sits above it, carries its own experience minimum, and a state can waive your journeyman exam while still requiring you to qualify for master on its own terms. Each board's master rules are linked from its state page; confirm them before assuming a journeyman agreement carries them.

The Uniform Plumbing Code (IAPMO) and the International Plumbing Code (ICC) set the technical standards states adopt, but code adoption is not licensing — each state or locality still controls who may hold its license. Two states can enforce the same code and share no reciprocity. Bilateral agreements are also added and dropped without fanfare, so the verification date on each page is the day we last confirmed its partners against the board.