Plumber License from California to Idaho: Does It Transfer? (2026)
Does Idaho accept a California plumbing license?
There is no California state license to carry to Idaho: California issues no statewide journeyman plumber license. Idaho does license this work, so ask the Idaho Division of Occupational and Professional Licenses (DOPL) — State Plumbing Board whether it credits a local license or your documented experience; otherwise you qualify as a new applicant.
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Same data, interactive — with share link and board links.
Verdict
No state license to transfer
The issue on this move is the starting point: California issues no statewide journeyman plumber license — plumbing there is regulated at the contractor level or by cities and counties — so there is no California state license for Idaho to verify or endorse. Idaho does license plumbers, through the Idaho Division of Occupational and Professional Licenses (DOPL) — State Plumbing Board, and it reviews out-of-state plumbers for endorsement, but that route starts from a state license. Ask the board, in writing, whether it credits a local California license, a contractor-level credential or your documented hours; otherwise plan to qualify as a new journeyman applicant. Idaho waives its journeyman plumber written examination for reciprocity applicants who hold an active journeyman license obtained BY EXAMINATION in Montana, Oregon, or Washington and who meet the experience and residency conditions ('No written examination shall be required for the reciprocal certificate when reciprocating from' these states); every other applicant must pass the IAPMO-based Idaho journeyman examination.
What's different between California and Idaho
Computed from both states' verified data rows, in both directions, and from the route every other origin gets into Idaho. Exam notes are our summary of each board's published rules, with sources below.
- Route, each way
California to Idaho (this page): No state license to transfer.
Idaho to California (the reverse move): No state license to transfer.
California issues no statewide journeyman plumber license, so neither direction is a state-license transfer.
- Does coming from California matter?
Coming from California matters here: only 9 of 50 origins (the other 49 states and DC) get this result for a move into Idaho.
The others get: licensure by endorsement (38) and reciprocity agreement (3).
- Reciprocity agreements
Idaho's reciprocity agreement list names 3 states (Montana, Oregon, and Washington), not including California.
- Fee and processing
California issues no statewide journeyman plumber license, so there is no California state license application fee or processing time to compare with Idaho's.
- Exam rules on record
Idaho and California carry different exam notes (our summaries, below); any state law or jurisprudence exam is listed with each state's requirements.
- Idaho (this move): Idaho waives its journeyman plumber written examination for reciprocity applicants who hold an active journeyman license obtained BY EXAMINATION in Montana, Oregon, or Washington and who meet the experience and residency conditions ('No written examination shall be required for the reciprocal certificate when reciprocating from' these states); every other applicant must pass the IAPMO-based Idaho journeyman examination
- California (the reverse move): Not applicable at the journeyman level — California issues no state journeyman plumber license, so there is no state journeyman trade exam. Plumbing is licensed only at the contractor level by the Contractors State License Board (C-36 Plumbing). At that contractor tier, CSLB has a reciprocity agreement covering the C-36 classification with Arizona only: an Arizona C-37 or C-37R contractor who has held that license active and in good standing for the previous five years may have the C-36 trade exam waived (CSLB reserves the right to require it), but must still pass CSLB's Law and Business exam. CSLB's other reciprocity partners (Nevada, Louisiana, Mississippi, North Carolina) do not map to C-36 Plumbing.
What changes, California → Idaho
| California (current) | Idaho (destination) | |
|---|---|---|
| Application fee | No state journeyman plumber license exists, so there is no journeyman fee. For reference, the CSLB C-36 plumbing CONTRACTOR license (contractor tier, out of scope) is $450 original application + $200 initial license fee (sole owner) / $350 (non-sole owner), plus a bond and Live Scan fingerprint fee | $51.90 ($51.90 non-refundable application/processing fee, charged at the same rate whether the application type is Initial, Reciprocal, or Reopen Closed License (DOPL Plumbing Journeyman Application, revised 2024-10-03). Not included in this amount: the IAPMO journeyman examination fee paid to PSI, later renewal fees, and the 2.5% Access Idaho surcharge added when paying by credit or debit card. idaho.gov hosts still refused direct connections on 2026-09-01, so the DOPL application form was read from an Internet Archive capture of the board's own PDF) |
| Processing time | Not applicable — no state journeyman plumber license is issued | No board-stated processing time in weeks |
| Licensing authority | California Contractors State License Board (CSLB) | Idaho Division of Occupational and Professional Licenses (DOPL) — State Plumbing Board |
The destination column is what you must satisfy — Idaho sets the rules for this move.
Step by step
- Review Idaho's requirements on the Idaho Division of Occupational and Professional Licenses (DOPL) — State Plumbing Board website (linked below) — rules change.
- Ask the Idaho Division of Occupational and Professional Licenses (DOPL) — State Plumbing Board whether it credits a local California license or your documented experience: California issues no statewide journeyman plumber license, so there is no state license to verify.
- Otherwise apply as a new applicant: meet Idaho's education/experience requirements and pass the exams it requires.
- Submit the application with fees listed above, and allow for the processing time shown there.
Official links
Related guides
Frequently asked questions
What happens to my California credential after I'm licensed in Idaho?
Nothing changes it. California issues no statewide journeyman plumber license, so any local or contractor-level California credential you hold runs on its own authority's renewal rules, independently of your Idaho license.
Sources
Primary sources only — official boards and compact commissions. Data last verified California 2026-07-21, Idaho 2026-09-01.
- Idaho DOPL — State Plumbing Board FAQs (reciprocity states and conditions) ↗ (accessed 2026-07-21)
- Idaho DOPL — Plumbing Journeyman Application Instructions (exam waiver for reciprocity; 8,000-hour experience; IAPMO exam) ↗ (accessed 2026-07-21)
- Idaho DOPL — Montana plumbing reciprocity agreement ↗ (accessed 2026-07-21)
- Idaho DOPL — Oregon plumbing reciprocity agreement ↗ (accessed 2026-07-21)
- Oregon BCD — Reciprocal agreement, Idaho journeyman plumber (mirror) ↗ (accessed 2026-07-21)
- Idaho DOPL — Plumbing Journeyman Application, revised 2024-10-03 ($51.90 application fee for Initial, Reciprocal, and Reopen Closed License; Internet Archive capture of the DOPL PDF dated 2026-02-14, used because idaho.gov refuses direct connections) ↗ (accessed 2026-09-01)
- CSLB — C-36 Plumbing Contractor classification detail (plumbing licensed only at contractor level) ↗ (accessed 2026-07-21)
- CSLB — Reciprocal Classifications List (C-36 reciprocity maps only to Arizona C-37/C-37R) ↗ (accessed 2026-07-21)
- CSLB — Reciprocity Exam Requirements (trade portion may be waived; Law & Business exam still required; 5-year license) ↗ (accessed 2026-07-21)
Reviewed by the License Reciprocity Editorial Team · verified against primary sources California 2026-07-21, Idaho 2026-09-01
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