Plumber License from Idaho to California: Does It Transfer? (2026)
Last verified: 2026-07-21 · source: California Contractors State License Board (CSLB) ↗
No — California has no reciprocity or endorsement path for Idaho plumbing license holders. You must apply to the California Contractors State License Board (CSLB) as a new applicant and meet California's full licensing requirements, including its exams.
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Verdict
Full re-application
There is nothing at the state level to transfer your Idaho license into: California issues no statewide plumbing license, so plumbers there are licensed at the contractor level or by cities and counties. 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.. The move is a local or contractor-board application, not a reciprocity filing — identify the authority that governs your worksite and work from its exam, experience, and fee rules. Your Idaho license may count toward a local experience requirement, but California has no state credential for it to reciprocate into.
What changes, Idaho → California
| Idaho (current) | California (destination) | |
|---|---|---|
| Application fee | Idaho DOPL journeyman plumber license fees are prorated and reciprocity applicants pay the standard application/license fee, but the exact figure could not be confirmed on a directly loaded DOPL fee schedule because every idaho.gov host was unreachable (connection refused) from the research environment; one search result cited a $147 three-year license fee and another cited roughly $29 license / $22 renewal — the two conflict, so no figure is asserted. Confirm on the DOPL fee schedule | 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. |
| Processing time | No board-stated processing time in weeks | Not applicable — no state journeyman plumber license is issued |
| Licensing authority | Idaho Division of Occupational and Professional Licenses (DOPL) — State Plumbing Board | California Contractors State License Board (CSLB) |
The destination column is what you must satisfy — California sets the rules for this move.
Step by step
- Review California's initial-licensure requirements on the California Contractors State License Board (CSLB) website (linked below).
- Expect to meet California's education/experience requirements and pass its required exams — prior out-of-state licensure may still count toward experience.
- Submit the standard (new applicant) application with fees (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.).
- Allow Not applicable — no state journeyman plumber license is issued.
Official links
Related guides
Frequently asked questions
Does California accept a Idaho plumbing license?
No — California has no reciprocity or endorsement path for Idaho plumbing license holders. You must apply to the California Contractors State License Board (CSLB) as a new applicant and meet California's full licensing requirements, including its exams.
Which exam applies moving from Idaho to California?
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 does the Idaho-to-California move cost and how long does it take?
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.; processing Not applicable — no state journeyman plumber license is issued.
Can I keep my Idaho plumbing license after I'm licensed in California?
Yes — plumbing licenses in different jurisdictions run independently. Keep the Idaho credential active on its own renewal and continuing-education schedule and you hold both, which is common for plumbers working near a state line.
Sources
Primary sources only — official boards and compact commissions. Data last verified 2026-07-21.
- 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)
- 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)
Reviewed by Billy Reiner, Editor · verified against primary sources 2026-07-21
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