How to Get a Plumber License in Washington
Last updated: March 1, 2026
Quick Facts
Education
0 hrs
Total Cost
$440
Governing Body
Washington State Department of Labor and Industries — Plumber Certification Program
Washington is a high-growth market anchored by Seattle's tech economy, making it an excellent place to start a career as a plumber. Licensing in Washington is overseen by the Washington State Department of Labor and Industries — Plumber Certification Program. The process does not require any pre-license education hours. You'll need to pass the Washington Journeyman Plumber Exam (administered by State-administered) with a score of at least 70%.
Washington does not require any pre-license education hours. The total cost is relatively affordable at $279 to $600, including education, application, and exam fees. Most aspiring plumbers complete the entire process in 4-8 weeks, depending on how quickly they move through the coursework and exam preparation.
WashingtonPlumber License Requirements
| Requirement | Details |
|---|---|
| Minimum Age | 18 years old |
| Pre-License Education | 0 hours |
| Degree Required | No |
| Exam Required | Yes — Washington Journeyman Plumber Exam |
| Passing Score | 70% |
| Background Check | No |
| Broker Sponsorship | Not required |
| Application Fee | $93 |
| Exam Fee | $93 |
| Governing Body | Washington State Department of Labor and Industries — Plumber Certification Program |
| License Reciprocity | None |
Reciprocity:Washington may offer reciprocity to plumbers from states with substantially equivalent requirements.
Steps to Get Your Plumber License in Washington
- 1
Complete Apprenticeship or Experience Requirement
Must complete 4 years (8,000 hours) of apprenticeship, including at least 576 hours of related/supplemental instruction. Most states require 4+ years of on-the-job training under a licensed plumber.
Time: 4-5 years Cost: $150 - 2
Submit Your License Application
Apply through the Washington State Department of Labor and Industries — Plumber Certification Program. You'll need documentation of your work experience, and the application fee is $93.
Time: 2-6 weeks for processing Cost: $93 - 3
Pass the Washington Journeyman Plumber Exam
Schedule and pass the plumbing licensing exam administered by State-administered. You must score at least 70% to pass.
Time: 2-4 weeks to prepare and take Cost: $93 - 4
Obtain Insurance if Required
Some states and employers require liability insurance before you begin working independently. Check the Washington State Department of Labor and Industries — Plumber Certification Program requirements.
Time: 1-2 weeks - 5
Receive Your Plumber License
Once you've passed the exam and met all requirements, the Washington State Department of Labor and Industries — Plumber Certification Program will issue your license. You can then legally perform plumbing work in Washington.
Time: 1-4 weeks
Key Things to Know
- Education requirement: Must complete 4 years (8,000 hours) of apprenticeship, including at least 576 hours of related/supplemental instruction.. Many providers offer online options, giving you flexibility to study on your own schedule.
- The licensing exam: The Washington Journeyman Plumber Exam is administered by State-administered. You'll need to score at least 70% to pass. Study materials and practice exams are available from most education providers.
- Already licensed in another state? Washington may offer reciprocity to plumbers from states with substantially equivalent requirements.
- Online application available: Washington accepts online applications, which can speed up processing time.
- Ongoing requirements: Once licensed, you'll need 16 hours of continuing education every 3 years. 16 hours of continuing education every 3 years.
How Much Does a Plumber License Cost in Washington?
| Cost Item | Estimated Range |
|---|---|
| Pre-License Education | $300 - $700 |
| Application Fee | $93 |
| Exam Fee | $93 |
| Total Estimated Cost | $279 - $600 |
License Renewal
- Renewal Period: Every 3 years
- Continuing Education:16 hours
- CE Details:16 hours of continuing education every 3 years
- Renewal Fee: $93
Tips for Success
- Choose your education provider carefully: Compare prices, format (online vs. in-person), and reviews. Some providers offer exam prep materials bundled with the course, which can save you money. Check the Washington State Department of Labor and Industries — Plumber Certification Program website for a list of approved providers.
- Don't rush the exam: Since no pre-license education is required, you can focus directly on the application and exam process. Use practice exams to identify weak areas before scheduling your test date.
- Start with an apprenticeship: Most states require 4-5 years of on-the-job training under a licensed plumber. Union apprenticeships (UA) and non-union programs both offer structured paths with paid training.
- Know your plumbing codes: The licensing exam tests your knowledge of plumbing codes (Uniform or International Plumbing Code). Get the relevant code book for your state and take practice exams before scheduling your test.
- Budget approximately $600 for your Washington license: This includes $93 in application fees, $93 for the exam, and education costs. Once licensed, plan for $93 in renewal fees every 3 years.
Frequently Asked Questions
How long does it take to get a plumber license in Washington?
Most people complete the process in 2-4 weeks total. There are no pre-license education requirements. After completing education, the exam and application process typically adds 2-6 weeks.
How much does it cost to get a plumber license in Washington?
The total cost ranges from $279 to $600, including pre-license education, the application fee ($93), and the exam fee ($93).
Can I get a Washington plumber license with a criminal record?
The Washington State Department of Labor and Industries — Plumber Certification Program evaluates criminal history on a case-by-case basis. Having a criminal record does not automatically disqualify you, but certain offenses may affect your eligibility. Contact the Washington State Department of Labor and Industries — Plumber Certification Program for guidance before applying.
Do I need a college degree to become a plumber in Washington?
No. Washington does not require a college degree. No pre-license coursework is required.
Can I take the pre-license courses online in Washington?
Many approved education providers offer pre-license courses online, allowing you to study at your own pace. Check the Washington State Department of Labor and Industries — Plumber Certification Program website for a list of approved providers.
Sources
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