How Plumber License Transfer Works: Journeyman Reciprocity, Endorsement, and No-License States

Why plumbing never built a compact

Nursing solved portability with one interstate compact; plumbing never did, and there is no federal role to force the issue. The technical side is actually standardized — most states adopt either the IAPMO Uniform Plumbing Code or the ICC International Plumbing Code — but those codes govern how pipe is installed, not who is allowed to install it. Licensing stayed with the states, and in several states with cities and counties, and qualification is built on apprenticeship hours rather than one national exam. Portability therefore grew as scattered neighbor-to-neighbor agreements, so the destination's board is the only authority that matters and there is no shortcut that works everywhere.

What a reciprocity agreement actually waives

Read every plumbing agreement as one exam waiver, not a license transfer. A named-partner deal waives the destination's journeyman trade exam for a plumber who earned the origin license by examination — grandfathered or experience-waiver licenses are typically excluded — and whose license is active and in good standing. Everything else survives: the destination's application, its fees, any background or code-familiarity requirement, and, if you want it, its separate master-tier qualification. Plumbers who assume an agreement means "walk in and work" lose the time they thought they were saving.

No agreement, or no statewide license: your two fallbacks

If no agreement or endorsement covers you, the honest path is a new-applicant journeyman application with your experience as an accelerant: you document the destination's required apprenticeship years or on-the-job hours — the hours you have already worked usually count — and you sit its journeyman exam. If the destination issues no statewide license, there is nothing to apply for at the state level; you either qualify at the contractor level, working under a licensed plumbing contractor, or license with the specific city or county where you will work, on its exam and its terms. Order your certified license history and employment records early — they are the long-lead item.

Common pitfalls

Four catch relocating plumbers. Assuming any out-of-state license qualifies for a waiver, when most agreements require that yours was earned by examination rather than grandfathered in. Assuming a journeyman agreement carries your master license, which it often does not. Trusting an aggregator's partner list, which lags the boards and keeps lapsed deals. And planning a move into a state that turns out to issue no statewide license, where the real question is which contractor board or municipality licenses you, not which state agreement applies.

Proving your experience: affidavits, hours and the records behind them

Any board that does not waive its exam outright will ask you to prove time in the trade, usually on a sworn experience affidavit signed by employers or supervisors. The required totals differ. Arkansas sets a minimum of four years of experience for its journeyman exam and five for master. Nevada's plumbing board wants four years in a state-registered, accredited apprenticeship or 8,000 hours of substantiated experience, documented on its Affidavit of Experience. Some boards will not count out-of-state time at all: Washington's Department of Labor & Industries says hours from out-of-state employers, and from other states' trainee or apprenticeship programs, are not eligible toward its certification. New York City's master plumber license requires seven years of experience within the last ten, two of them as a registered journeyman, all under the direct and continuing supervision of a licensed master plumber somewhere in the United States. Its application asks for an experience form signed by every supervisor, a Social Security earnings history, and recent pay stubs or W-2s. Gather these records before you move. Employers close and supervisors retire, and an earnings history from the Social Security Administration covers years when no former employer is left to sign.

The fine print inside a reciprocity agreement

A partner list is only half of an agreement. The conditions attached to it decide whether you qualify. Minnesota's Department of Labor and Industry waives its exam for North Dakota and South Dakota plumbers only if the license was earned by state-level examination, has been held for at least one year, is current and in good standing, and was not obtained through a reciprocal agreement with a city or other political subdivision. You also must never have failed the same or a higher class of Minnesota exam. Once approved, you have 180 days to pay the license fee. South Dakota names no partners at all. Its rule requires that you were licensed by examination, that your state's licensure laws are similar, and that your state's plumbing code equals or exceeds South Dakota's. Arkansas asks a reciprocity applicant for forms from the other state showing license status, any suspensions or revocations, the types of examinations given and the plumbing and gas codes used, plus the names of every state that has ever licensed you. Texas's route for plumbers from states without an agreement requires a journeyman or master license held for two years before you may apply for its out-of-state examination. Read the conditions before the list, because one unmet condition turns a waiver into a full exam.

Which code is on the exam you'll sit

Code adoption does not decide who gets licensed, but it decides what you study when a board makes you sit its exam. Washington's plumber exam, given by PSI, is based on the 2015 Uniform Plumbing Code as amended by the Washington State Building Code Council. A plumber trained on the International Plumbing Code is studying a different book, and the state amendments on top of it. Philadelphia requires the Journeyman Plumber Examination administered by the International Code Council, and the exam must reference the current Philadelphia Code; otherwise you must apply within 12 months of passing it. Arkansas notes that its Plumbing and Fuel Gas Codes are published by the ICC, and South Dakota will only recognize an out-of-state license if that state's plumbing code equals or exceeds South Dakota's, which makes the code itself a condition of reciprocity there. The practical step: when you have to take a board's exam, find out which code edition and which local amendments it names, and study that edition rather than the book you used at home. Exam vendors and boards publish candidate bulletins with the reference list, and an open-book exam is only open to the books it lists.

Working while you wait: temporary permits

A few plumbing boards let a licensed out-of-state plumber work before the full license issues, and the terms are narrow. Washington offers a one-time 120-day temporary permit for $100.30 to a plumber with a current, unexpired out-of-state license who is waiting to take the Washington exam. Anyone who has held a temporary permit before, or any Washington plumber or trainee certificate, is not eligible. Arkansas's rules direct the Department of Health to issue a temporary revocable permit or provisional license immediately on request once the examiners approve you to sit the exam. It runs 90 days, the committee can extend it for hardship, and it is revoked if you turn out not to meet the criteria. Where a board publishes no permit, assume you cannot work in the trade there until the license issues, and set the move date by the exam calendar. Failing costs time as well as the fee. Texas makes you wait 30 days after a first failure, 60 days after a second and 90 days after each later one, and an incomplete Texas out-of-state application expires one year after the board receives it.

Local-only licensing: how two cities do it

In a state with no statewide plumbing license, the city or county is the licensing board, and its rules can be as demanding as any state's. Philadelphia licenses journeyman plumbers through its Department of Licenses and Inspections. You qualify with four years as a registered apprentice plumber in Philadelphia, or with a comparable authorization from another state or local jurisdiction whose qualification requirements are equal or greater, if the department approves it. You also need the ICC-administered journeyman exam on the Philadelphia Code. The license costs $126 and is renewed every year. New York City's Department of Buildings runs a two-stage master plumber exam: $585 for the written test, which is multiple choice on the city's construction codes with no reference materials allowed and a 70% pass mark, and $530 for the practical, which you must pass within 24 months of the written result. The license also has a business test. You must be an officer, partner or sole proprietor of a business with a place of business in a commercial zone in New York City, and carry general liability, workers' compensation and disability insurance. If you are moving to Pennsylvania or New York, start with the city where the work is, not the state capital.

Universal licensing: Arkansas's residency route

Some states have added a route that does not depend on a partner list. Arkansas's Act 457 of 2023, written into the Department of Health's plumbing rules, grants automatic occupational licensure to an applicant who establishes Arkansas residency and either has held a similar-scope master, journeyman or restricted plumbing license in good standing for at least one year, or has worked in the occupation for at least three years in a state that does not license it. You must have no disqualifying criminal offense and no complaint, allegation or investigation pending where you were licensed, and you must pass an exam on Arkansas plumbing law, which the department can waive if your education, training and experience are a sufficient substitute. The route does not apply to anyone holding a license covered by one of Arkansas's reciprocal agreements; those plumbers use the agreement. The second branch of the rule matters most for plumbers from states with no statewide license, because three years of documented work can stand in for a license they had no way to hold. Residency is the condition, so this is a route for a move, not for a job across the state line.

Old licenses, lapses and criminal history

Two situations need planning before you file. The first is a lapsed license. Minnesota makes its own licensees who have not renewed within two years after expiration retake and pass the exam. Arkansas reinstates a journeyman license for $150 and a master license for $325, plus back fees and penalties; once a license has been delinquent for more than five consecutive years, you file an amended experience record and the examiners decide whether to reinstate with or without an exam. Reciprocity conditions in Minnesota and Arkansas both require the origin license to be current and in good standing, so renew at home before you apply elsewhere. The second is a criminal record. Texas's out-of-state examination application asks whether you have ever been convicted of a felony or misdemeanor in any state, requires a Supplemental Criminal History Information Form with a yes answer, and will not be approved until your IdentoGO fingerprints are on file. Arkansas lets you petition the State Board of Health, under Act 990 of 2019, for a decision on whether your record disqualifies you and whether a waiver is available, before you apply. Answer conviction questions in full: Arkansas's rules allow suspension, revocation or denial for false information.

Key terms in the glossary: licensure by endorsement, interstate compact, primary state of residence, reciprocity.