Louisiana · plumber licensing · verified July 2026
Louisiana plumber license requirements
The short answer
As of July 2026, Louisiana licenses all plumbing work statewide through the State Plumbing Board of Louisiana (SPBLA). Everyone performing plumbing must first register as an apprentice ($20), then can test up through Residential Plumber Limited (3,000-4,000 hours), Journeyman (7,000-8,000 hours), and Master Plumber (requires a current journeyman or PE license). All licenses renew annually by December 31 with continuing professional education (3.5-5 hours depending on tier).
Do you need a license to work as a plumber in Louisiana?
Louisiana licenses plumbers statewide, so one credential is valid across the whole state.
Reciprocity (Arkansas, Texas) applies to journeyman licenses only; SPBLA states master licenses have no reciprocity. SPBLA also issues Journeyman/Master Natural Gas Fitter licenses (journeyman gas: 3,000 indentured/4,000 unindentured hours, exam $135, license $50; master gas: exam $110, active license $190), a Water Supply Protection Specialist (backflow) endorsement ($20 application, 40-hour tester certification, 3-year recertification), and Medical Gas certifications ($40 application; verifier $210, 3-year recertification). Temporary work permits: $75. spbla.com is the board's official site (state board, Baton Rouge).
What licenses does Louisiana issue?
The State Plumbing Board of Louisiana (SPBLA) issues the credentials below for this trade. Boards often list further classes for specialties and business licenses; these are the ones this page covers.
Hours are what each class asks for on its own terms. Where a senior class shows fewer than a journeyman, the board is counting time served after the earlier license rather than from the start; the prerequisite column says which.
| License | On-the-job hours | Classroom hours | Exam |
|---|---|---|---|
| Apprentice (registration) | not published | not published | No |
| Residential Plumber Limited | 4,000 | not published | Yes |
| Journeyman Plumber | 8,000 | not published | Yes |
| Master Plumber | not published | not published | Yes |
Source: State Plumbing Board of Louisiana (SPBLA) (spbla.com). Verified July 2026.
Residential Plumber Limited: Registered apprentice with required hours
Journeyman Plumber: Registered apprentice with 7,000 hours (indentured) or 8,000 hours (unindentured)
How many hours do you need in Louisiana?
Louisiana requires 8,000 hours of on-the-job experience for a Journeyman Plumber license. At a 40-hour week the on-the-job portion is roughly 4 years of full-time work.
What exam does Louisiana require?
Journeyman Plumber exam (80 written questions/3 hours + 1-hour practical; 2021 IPC & IRC). Administered by State Plumbing Board of Louisiana. Exam fee $135.
Master Plumber exam (three written parts: 80q/3h code, 25q/2h Title 51, 40q/2h NASCLA business & law). Administered by State Plumbing Board of Louisiana. Exam fee $110.
Residential Plumber Limited exam (80 written questions/3 hours + 1-hour practical; 2021 IRC). Administered by State Plumbing Board of Louisiana. Exam fee $135.
How much does a Louisiana plumber license cost?
Getting a Journeyman Plumber license in Louisiana costs $205 in board fees, before any training. That is the application fee, the exam fee and the initial license fee charged once, with renewal charged separately below. No board publishes this total, so it is added up here from the schedule it does publish.
- Application fee$20
- Exam fee$135
- Initial license fee$50
- Renewal fee (recurring)set per license class
How often do you renew, and what continuing education is required?
Renewal period: 1 year, all licenses renew annually by December 31
Continuing education: Residential Plumber Limited and Journeyman: 3.5 hours CPE annually; Master (active): 5 hours annually; inactive masters not performing work and registered apprentices are exempt
How does the apprenticeship route work?
All hours toward licensure are earned as a registered apprentice. Enrollment in a Louisiana Workforce Commission approved (indentured) apprenticeship program lowers the hour requirements: 7,000 vs 8,000 hours for journeyman, and 3,000 vs 4,000 hours for Residential Plumber Limited.
Which states does Louisiana have license reciprocity with?
Louisiana appears in 3 published reciprocal licensing agreements for this trade, covering AR, California, TX. Boards write these as agreements between two states rather than as a one-way list, and some publish the list while their counterpart does not, so this counts every agreement naming Louisiana from either side. Recognition is never automatic: the board you apply to decides, and most require the original license to have been earned by examination and to be in good standing.
How does Louisiana compare to neighboring states?
Requirements stop at the state line, which matters if you live near one or expect to move. Here is what the neighboring states ask of the same trade.
| State | Journeyman hours | Licensing model |
|---|---|---|
| Louisiana | 8,000 | Statewide |
| Arkansas | not published | Statewide |
| Mississippi | not published | Contractor level only |
| Texas | 8,000 | Statewide |
Source: state licensing boards. Verified July 2026.
How does Louisiana compare nationally?
21 states publish an explicit hour figure for this trade, and they range from 4,000 to 12,000 hours. Louisiana's 8,000 hours is what 9 of them ask, making it the standard rather than an outlier; 9 states ask less and 3 ask more. The full comparison is on the hours by state table.
Sources and verification
Every fact on this page traces to one of these
Last verified July 2026. Found an error? Report it and it will be corrected and logged on the corrections page.
Other states with published requirements for this trade: Maine, Maryland, Massachusetts, Michigan, Minnesota.
Price the whole path with the license cost estimator, or weigh earning against paying for school with the apprenticeship comparison. Back to plumbers overview.
Licensing requirements change between our verification sweeps. This page is informational only, so confirm current requirements with State Plumbing Board of Louisiana (SPBLA) before making decisions. Not legal advice.