Plumber License in Washington

Quick Answer

Washington requires plumber contractors to hold a state license. A state exam is required. Application fees start at $100-$275. Licenses renew biennial.

License Requirements

License Type: State License
Exam Required: Yes — state or trade exam required
Experience: 3+ years in plumber
Insurance: $200,000 general liability
Bond: $5,000-$10,000

Fees

Application Fee: $100-$275
Exam Fee: $50-$120
License Fee: $100-$200
Renewal Fee: $75-$175 (Biennial)

Governing Body

Washington State Plumbing Board
Official Application Portal ↗
Renewal: Every biennial
Reciprocity: OR, ID

How to Get a Plumber License in Washington

Step-by-step application process.

Verify you meet the experience requirement (3+ years in plumber)
Obtain required insurance: $200,000 general liability
Obtain surety bond: $5,000-$10,000
Pass the required exam — schedule through the state exam provider
Submit application to Washington State Plumbing Board
Pay applicable fees and await license issuance (typically 2–8 weeks)

Important Notes

Washington requires licensed plumbers for most plumbing work. Master Plumber and Journeyman Plumber licenses available. Local permits required for each project.

Frequently Asked Questions

Do I need a license to do plumber work in Washington?

Yes. Washington requires plumber contractors to hold a state license. Washington requires licensed plumbers for most plumbing work. Master Plumber and Journeyman Plumber licenses available. Local permits required for each project.

How much does a plumber license cost in Washington?

In Washington, the application fee is typically $100-$275. Exam fees are $50-$120. License fees are $100-$200. Renewal is $75-$175 per biennial cycle.

Is an exam required for a plumber license in Washington?

Yes, Washington requires passing a licensing exam for plumber contractors. The exam typically covers state laws and regulations plus trade-specific knowledge.

How do I renew my plumber license in Washington?

Washington plumber licenses renew biennial. Renewal fees are $75-$175. Many states require continuing education for renewal. Contact Washington State Plumbing Board for current renewal requirements.

Does Washington have reciprocity for plumber licenses?

Yes, Washington has reciprocity agreements with: OR, ID. Contractors licensed in these states may qualify for expedited or waived requirements. Contact Washington State Plumbing Board for current reciprocity details.

Plumber Licensing in Neighboring States

Compare requirements in nearby states — useful if you work across state lines.