Alaska Plumber License Requirements (2026)

Alaska’s Department of Labor and Workforce Development (DOLWD) Mechanical Inspection Section issues the individual Plumber Journeyman Certificate of Fitness (COF). It authorizes work subject to the state plumbing standards in AS 18.60.705 and 8 AAC 63.010. A trainee COF is required to accrue Alaska work hours toward the Journeyman COF; an applicant normally needs 8,000 qualifying hours and a 70% examination score. Alaska also has Restricted Gas and Restricted Utility plumbing COFs with narrower scopes. A business that contracts for plumbing or other mechanical work is a separate Commerce mechanical-contractor registration and must have a matching Mechanical Administrator assigned; municipalities and other local authorities can separately require permits and inspections. DOL plumbing inspection jurisdiction includes communities of 2,500 and above, but that does not replace local permitting where it applies.

Regulatory Body

This license is issued and enforced by Alaska Department of Labor and Workforce Development — Mechanical Inspection Section (DOLWD Mechanical Inspection) pursuant to AS 18.60.705; 8 AAC 63 and 8 AAC 90. Issues plumbing Certificates of Fitness, verifies experience, administers testing, and performs state plumbing inspections within its jurisdiction.

• Official portal: https://labor.alaska.gov/lss/mi-license-req.html
• Address: See current Mechanical Inspection office contacts
• Phone: [email protected]

Eligibility Requirements

This guide does not establish a minimum applicant age; confirm any age requirement with the issuing authority. Applicants must provide a Social Security Number. DOLWD accepts legally obtained equivalent work from other states. Out-of-state applicants must provide an origin-state license or a letter confirming no license is required for the scope; residency is not listed as a Journeyman COF prerequisite.

Good moral character

Submit the current COF application and all requested experience documentation. DOLWD verifies training, experience, registration, and examination eligibility.

Background investigation

The current electrical/plumbing COF application requests Social Security number and date of birth. It does not list a separate universal criminal-background-check fee or process for Plumber Journeyman applicants.

Experience and Education

The applicant must document and verify at least 4 years of A Plumber Journeyman applicant needs 8,000 hours of legally obtained commercial/residential plumbing installation experience. Alaska work must be performed while holding a Plumber Trainee COF. DOLWD allows stated maximum credits: 4,000 military/vocational hours, 1,000 classroom hours, 500 utility-plumbing hours, and 2,000 gas-work hours; maintenance hours do not count.. Keep payroll, tax, project, or supervisor records to support the claim, as the board can request proof for any period within its lookback window.

Accepted proof of experience or eligibility

• Current DOLWD Electrical and Plumbing COF application
• Experience Verification Form(s), preferably completed by the employer every six months or at separation
• For Alaska trainee hours: Registered Apprenticeship Program Davis-Bacon/RAPIDS registration letter and valid Plumber Trainee COF
• For out-of-state work: origin-state license or origin-state letter confirming no license was required for that scope

Education substitution

Classroom training can receive no more than 1,000 hours of credit. It does not replace the required qualifying experience in full.

Exam Requirements

The examination requirement has not been established in this record. Confirm it with the authority before applying. Provider or process notes: Alaska DOLWD Mechanical Inspection Section

Examination fee: Pay a $50 nonrefundable application fee. The $200 two-year certificate fee is due after the required examination is passed and before issuance; DOLWD schedules the examination after validating the application.

Retake policy: A 70% passing score is required. After a failed examination, wait 30 days before reexamination. Current DOLWD testing information identifies the Plumber Journeyman exam as open book and based on the 2018 Uniform Plumbing Code.

Insurance and Bonds

The DOLWD Mechanical Inspection requires a $10,000 contractor license surety bond to be on file before the license will issue.

General liability

The Plumber Journeyman COF itself is an individual credential and its DOLWD requirements do not list a bond or liability policy. A business registered as an Alaska Mechanical Contractor must maintain the current public-liability/property-damage insurance required under AS 08.18.101.

Workers' compensation

Most Alaska employers must provide workers’ compensation benefits. For contractor registration, submit evidence if coverage is applicable.

Additional financial requirements

An Alaska Mechanical Contractor must post a $10,000 bond. This is a business-registration requirement, not an individual Journeyman COF fee.

Fee Schedule

To turn these board fees into a realistic year-one budget — bond premium, liability insurance, and exam prep included — open the cost calculator preloaded for Alaska plumber.

Renewal and Continuing Education

Expect to renew the Alaska Plumber Journeyman Certificate of Fitness every 2 years. Renewal currently costs $200. This COF is separate from contractor-business renewal. Mechanical Contractor registrations have their own insurance, bond, and even-year September 30 renewal cycle.

Continuing education: Complete 16 hours within the preceding 24 months. At least eight hours must address significant changes or updates to the Uniform Plumbing Code; no more than eight hours may be industry related.

Reciprocity

Alaska does not accept the NASCLA Accredited Examination for this classification.

DOLWD may reciprocate a plumbing COF with any U.S. jurisdiction whose requirements it determines are substantially similar. The applicant must prove an active origin-state license held for one full year; no examination is required for the reciprocal COF. A one-year provisional COF is also available while reciprocity is reviewed, with limits including no gas work and no apprentice supervision.

Weighing more than one jurisdiction? The national hub compares published Plumber license requirements by state — exam, bond, fee, and experience thresholds side by side.

Plumber Licensing in Other States

Contractors working near a state line, or weighing where to qualify first, should compare Alaska's requirements against the states most often compared against it before committing to an application:

• Washington Plumber License Requirements — Washington Journey Level Plumber (PL01)
• Oregon Plumber License Requirements — Oregon Journeyman Plumber and Plumbing Business (PB) License
• Idaho Plumber License Requirements — Idaho Journeyman Plumber and Plumbing Contractor
• California Plumber License Requirements — California Class C-36 — Plumbing Contractor

Step-by-Step Application Roadmap

1. Enroll with an employer and obtain the Trainee COF. For Alaska hour credit, obtain employer sponsorship in the federal Registered Apprenticeship Program and submit the Davis-Bacon/RAPIDS letter with the Trainee COF application.
2. Track 8,000 qualifying installation hours. Use DOLWD Experience Verification Forms. Maintenance hours do not count, and Alaska work without a valid trainee COF does not count.
3. Assemble allowed credit evidence. Document any military/vocational, classroom, utility, or gas-work credit within DOLWD’s published caps.
4. Apply to DOLWD and take the state exam. Submit the current application, $50 fee, and verification forms. DOLWD schedules testing after it validates eligibility; score at least 70%.
5. Pay the certificate fee. After passing, pay the $200 certificate fee for the two-year Journeyman COF.
6. Use the appropriate contractor structure. An independent plumbing/mechanical business generally needs Commerce Mechanical Contractor registration and an assigned Mechanical Administrator with the applicable category; the Journeyman COF alone is not that business authorization.
7. Obtain local permits and maintain renewal education. Confirm city/borough permit and inspection rules. Renew the COF within two years of expiration with 16 qualifying education hours.

Application Checklist

The items below are the ones worth confirming before the application is filed with DOLWD Mechanical Inspection:

• Employer sponsorship and federal apprenticeship registration letter for Alaska trainee hours
• Valid Plumber Trainee COF before accruing Alaska experience
• 8,000 qualifying installation hours and Experience Verification Form(s)
• Out-of-state license/letter if relying on equivalent work
• $50 DOLWD application fee
• DOLWD exam score of at least 70%
• $200 two-year certificate fee after passage
• If contracting: Commerce Mechanical Contractor registration, applicable Mechanical Administrator, $10,000 bond, insurance, business license, and local permits

Progress is saved in this browser, so you can return to this checklist while your application is in flight.

Common Filing Mistakes

Drawn from the board instructions and sources cited on this page, the pitfalls below are the ones most likely to slow down or sink a Alaska Plumber application.

Accumulating Alaska hours without a Trainee COF

DOLWD does not count Alaska plumbing work performed without a valid Plumber Trainee COF.

Counting maintenance as installation experience

DOLWD’s Journeyman requirements exclude maintenance hours.

Assuming no reciprocity exists

Alaska offers an individual reciprocity/provisional route for qualifying out-of-state plumbers; determine substantial similarity with DOLWD.

Using an ICC vendor claim

DOLWD conducts/schedules the current Journeyman testing process; the old ICC vendor and $200 examination claim was unsupported.

Using a Journeyman COF as a contracting-business license

A business performing mechanical contracting needs the separate Commerce registration and an applicable Mechanical Administrator, plus local approvals.

Study and Reference Materials

The references below are either cited by the board, used during the application, or standard preparation for the trade. They are listed purely for convenience — CLR earns no commission on any of them.

• Uniform Plumbing Code, 2018 edition — IAPMO. Listed by current DOLWD Mechanical Inspection testing information for the Plumber Journeyman open-book examination.
• DOLWD Plumber Journeyman requirements and Experience Verification Form — Alaska DOLWD. Primary source for experience categories, caps, and application process.
• Alaska plumbing standards — State of Alaska. Review AS 18.60.705 and 8 AAC 63.010 alongside the current test information.

Other Alaska Trade Licenses

CLR covers other Alaska trades as well — the published guides below may be more relevant:

• Alaska General Contractor License Requirements
• Alaska Electrician License Requirements
• Alaska HVAC Technician License Requirements
• Alaska Roofing Contractor License Requirements
• Alaska Painting Contractor License Requirements
• Alaska Landscaping Contractor License Requirements
• Alaska Masonry Contractor License Requirements
• Alaska Concrete Contractor License Requirements
• Alaska Carpentry Contractor License Requirements
• Alaska Solar Installer License Requirements
• Alaska Low-Voltage Technician License Requirements
• Alaska Fire Sprinkler Contractor License Requirements
• Alaska Home Inspector License Requirements
• Alaska Pool Contractor License Requirements
• Alaska Handyman License Requirements
• Alaska Pest Control License Requirements
• Alaska Septic Contractor License Requirements

Frequently Asked Questions

Who issues Alaska Plumber Journeyman Certificates of Fitness?

DOLWD Mechanical Inspection issues the individual Plumber Journeyman COF. Commerce separately regulates Mechanical Administrators and Mechanical Contractors.

How many hours are required?

DOLWD requires 8,000 hours of legally obtained commercial/residential plumbing installation experience, subject to its published credit limits. Alaska work must be accrued with a valid Plumber Trainee COF.

Does Alaska reciprocate plumbing credentials?

Yes, DOLWD may grant reciprocal plumbing COFs where the origin jurisdiction’s requirements are substantially similar and the applicant has held an active origin-state license for one full year.

What code is tested?

Current DOLWD testing information lists the open-book Plumber Journeyman examination as based on the 2018 Uniform Plumbing Code. Confirm the current test notice before purchase or scheduling.

How often does the Alaska Journeyman COF renew?

Every two years. Renewal requires the $200 certificate fee and 16 hours of qualifying education in the preceding 24 months; at least eight hours must cover significant UPC changes or updates.

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