Washington Contractor Licenses: Updated Requirements Guide
Washington regulates most contractor activities at the state level through the Washington State Department of Labor & Industries (L&I). Electricians and plumbers are licensed individually with exams and continuing education, while contractor businesses (general, specialty, roofing, HVAC) register with L&I and must carry bonding and liability insurance.
This guide explains the 2025 requirements for all major trades—electrician, plumbing, HVAC, general building, roofing, and key specialty categories—using official state data. Where information is not specified on L&I’s main pages, we note it clearly and direct you to the appropriate source so you can verify details before you apply.
While most licensing is statewide, always confirm any local project requirements (permits, business licenses, or endorsements) with the city or county where you plan to work. Local governments control permitting and can impose additional rules even when the contractor license or registration itself is issued by the state.
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Overview of Washington Contractor Licensing
Contractor licensing and registration in Washington are overseen by the Washington State Department of Labor & Industries (L&I). Electricians and plumbers are licensed as individuals and must meet documented experience, pass state exams, and complete continuing education each renewal cycle. Contractor businesses (general and specialty) register with L&I, post a bond, and maintain liability insurance to legally bid, advertise, and perform work.
Electrical and plumbing work is more tightly regulated because it affects life-safety systems; you’ll see detailed experience and renewal requirements for those trades. For general, roofing, HVAC, and many specialty contractors, the state requires business registration with specific bonding and insurance minimums but does not require a trade exam for the business entity. Individual HVAC technicians are not licensed by L&I; however, the HVAC contracting business must be properly registered as a specialty contractor.
Local governments throughout Washington issue building permits and may require local business licenses or project-specific approvals. While our research did not find city-specific contractor license credentials beyond state registration in major cities, always confirm the local rules for your project location.
Browse all Washington contractor license practice tests →
Electrician Licenses in Washington
Washington regulates electrical work with 5 license types:
- Electrical Administrator (Administrator)
- Journeyman Electrician (Journeyman)
- Master Electrician (Master)
- Electrical Trainee (Apprentice)
- Residential Electrical Contractor (Contractor)
Electrical Administrator
Requirements
- Age: 18+
- Experience: Not specified directly on the L&I main page; see RCW/WAC for detailed experience criteria
- Education: Not specified
- Exam: Required (state exam)
Administrators qualify and supervise the electrical work of a contracting business. Experience specifics are not detailed on the main L&I page and may be defined in Washington Administrative Code or RCW.
Exam Details
- Name: Electrical Administrator Certification Exam
- Format, questions, duration, passing score, references: Not specified on the L&I page
Fees
- Application: $82.10
- Examination: $46.10
- Renewal: $82.10 (biennial)
Renewal & CE
- Renewal frequency: Biennial
- Continuing Education: 24 hours per renewal period
Insurance
Insurance is not required for the individual Electrical Administrator certificate; insurance and bond requirements apply to the contractor business registration.
Journeyman Electrician
Requirements
- Age: 18+
- Experience: 8,000 hours documented under supervision of a master/administrator
- Education: None required
- Exam: Required (state exam)
Exam Details
- Name: Journeyman Electrician Exam
- Format, questions, duration, passing score, references: Not specified on the L&I page
Fees
- Application: $82.10
- Examination: $46.10
- Renewal: $82.10 (biennial)
Renewal & CE
- Renewal frequency: Biennial
- Continuing Education: 24 hours per renewal period
Insurance
No insurance is required for the individual journeyman license. Contractor businesses must maintain bond and liability insurance as part of L&I registration.
Official L&I page — Journeyman Electrician
PDF study guides designed for Washington’s EL01 exam, typically 1,500–2,500 questions with answer keys and code reference locators so you can confirm each solution in the code. Study offline at your pace with no usage limits.
Master Electrician
Requirements
- Age: 18+
- Experience: 4,000 hours documented as a journeyman
- Education: None required
- Exam: Required (state exam)
Exam Details
- Name: Master Electrician Exam
- Format, questions, duration, passing score, references: Not specified on the L&I page
Fees
- Application: $82.10
- Examination: $46.10
- Renewal: $82.10 (biennial)
Renewal & CE
- Renewal frequency: Biennial
- Continuing Education: 24 hours per renewal period
Insurance
Insurance is not required for the individual master license. Bond and liability insurance apply to contractor business registration.
Official L&I page — Master Electrician
In-depth PDF prep with 1,500–2,500 questions, complete answer keys, and pinpoint references to code sections helps you master Washington’s EL01 Master exam content. Study offline without limits.
Electrical Trainee
Requirements
- Age: 16+
- Experience: None required to register
- Education: Must be enrolled in or have completed an approved apprenticeship or training program
- Exam: Not required
Fees
- Application: $20.80
- Renewal: $20.80 (annual)
Renewal & CE
- Renewal frequency: Annual
- Continuing Education: None required for trainee registration
Insurance
No insurance is required for trainees. Trainees must work under appropriate supervision and within trainee scope.
Residential Electrical Contractor
Requirements
- Qualifying individual: Must hold a Master EL01, Master Electrician EL01, or Residential Administrator EL06 certificate
- Exam: No exam for the business; qualifying individual must meet all exam requirements for their credential
- Age: 18+
Fees
- Application: $82.10
- Renewal: $82.10 (biennial)
Insurance & Bond
Required. L&I requires contractor businesses to maintain a bond and liability insurance. Minimum amounts for residential electrical contractors are not specified on the L&I page cited; see L&I contractor bonding/insurance requirements for details.
Renewal & CE
- Business renewal: Biennial
- Qualifying individual CE: 24 hours per renewal period
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Plumbing Licenses in Washington
Washington regulates plumbing work with 2 license types:
- Plumber (Journeyman)
- Plumbing Contractor (business registration with a qualified master)
Plumber (Journeyman)
Requirements
- Age: 18+
- Experience: 8,000 hours (about 4 years) with documented apprentice experience
- Education: None required
- Exam: Required (state exam)
Exam Details
- Name: Journeyman Plumber Exam
- Format, questions, duration, passing score, references: Not specified on the L&I page
Fees
- Application: $95.60
- Examination: $46.10
- Renewal: $95.60 (biennial)
Renewal & CE
- Renewal frequency: Biennial
- Continuing Education: 24 hours per renewal period
Insurance
Individual plumbers are not required to carry insurance to hold the state credential. Plumbing contractor businesses must maintain bond and liability insurance as part of L&I registration.
Plumbing Contractor
Requirements
- Qualifying individual: Must hold a Master certificate and supervise the business’s plumbing work
- Exam: No exam for the business; the qualifying master must meet all exam requirements
- Age: 18+
Fees
- Application: $95.60
- Renewal: $95.60 (biennial)
Insurance & Bond
Required. Bond and liability insurance are required for plumbing contractor registration. The specific minimums are not shown on the cited L&I page; consult L&I’s contractor registration requirements for exact amounts.
Renewal & CE
- Business renewal: Biennial
- Qualifying master CE: 24 hours per renewal period
Looking for plumbing exam prep resources? Browse Washington contractor license practice tests and study material.
HVAC Licenses in Washington
Washington regulates HVAC contractors with 1 license type:
- HVAC/Refrigeration Technician (no state exam; work performed under a registered HVAC contractor)
HVAC/Refrigeration Technician
Requirements
- Supervision: Must be supervised by a licensed/registered HVAC contractor
- Experience: Not specified
- Education: Not specified
- Exam: Not required by the state for technicians
Fees
- Not specified (individual HVAC technicians are not state-licensed)
Insurance
No insurance requirement for individual technicians. The HVAC contracting business must meet L&I bond and liability requirements as a registered specialty contractor.
📍 Washington and Local Requirements
Washington issues trade licenses and contractor registrations at the state level through L&I. Cities and counties manage building permits and often require local business licenses, which are separate from state contractor registration.
What this means for you:
- Plan for state contractor registration and trade licensing where applicable (e.g., electrical, plumbing)
- Confirm project-specific permits and any local business licensing with the city or county
- The trade licenses shown in this guide are state-regulated; local rules typically relate to permitting and business registration
Finding local requirements: Search for your city/county building or permitting department and verify any additional local steps before starting work.
General Contractor Licenses in Washington
Washington regulates general contractors with 1 license type:
- General Contractor Registration (state registration; no trade exam)
General Contractor Registration
Requirements
- Experience: None required
- Education: None required
- Exam: Not required
Fees
- Application: $141.10
- Renewal: $141.10 (annual)
Insurance & Bond
- Liability insurance: $250,000 combined single limit, or $200,000 per occurrence and $50,000 property damage
- Bond: Required (see L&I contractor registration for current bond amount and acceptable forms, such as surety or assignment of savings)
Renewal & CE
- Renewal frequency: Annual
- Continuing Education: Not required for L&I registration
Building a GC team that includes licensed trades? Browse Washington contractor license practice tests and study material.
Roofing Licenses in Washington
Washington regulates roofing contractors with 1 license type:
- Roofing Contractor Registration (state registration as a specialty; no trade exam)
Roofing Contractor Registration
Requirements
- Experience: None required by the state for registration
- Education: None required
- Exam: Not required
Fees
- Application: $141.10
- Renewal: $141.10 (annual)
Insurance & Bond
- Liability insurance: $250,000 combined single limit, or $200,000 per occurrence and $50,000 property damage
- Bond: Required (see L&I contractor registration for current bond amount and acceptable forms)
Renewal & CE
- Renewal frequency: Annual
- Continuing Education: Not required for L&I registration
Specialty Trade Licenses in Washington
Washington regulates specialty trades with 4 license types listed below. Some have training prerequisites; others simply register as a specialty contractor with L&I and meet bond/insurance rules. Where the L&I main page does not specify details, contact L&I for the most current requirements.
Asbestos Contractor Registration
Requirements
- Training: Approved asbestos training program required
- Experience, exam, age: Not specified on the L&I page cited
Fees & Renewal
- Application, initial license, renewal: Not specified
Insurance & Bond
Not specified on the cited page. As a contractor registration, bond and liability insurance generally apply—confirm amounts with L&I.
Official L&I page — Register as a Contractor (Asbestos information listed under specialties)
Boiler Contractor Registration
Requirements
- Experience, education, exam: Not specified on the L&I page cited
Fees & Renewal
- Application, initial license, renewal: Not specified
Insurance & Bond
Not specified on the cited page. As a contractor registration, bond and liability insurance typically apply—confirm with L&I.
Mobile Home/Manufactured Housing Installation Contractor Registration
Requirements
- Experience, education, exam: Not specified on the L&I page cited
Fees & Renewal
- Application, initial license, renewal: Not specified
Insurance & Bond
Not specified on the cited page. Expect bond and liability insurance to be required for registration—verify with L&I.
Tree Service Contractor Registration
Requirements
- Experience: None required
- Education: None required
- Exam: Not required
Fees
- Application: $141.10
- Renewal: $141.10 (annual)
Insurance & Bond
- Liability insurance: $250,000 combined single limit, or $200,000 per occurrence and $50,000 property damage
- Bond: Required (see L&I contractor registration for current amounts)
Renewal & CE
- Renewal frequency: Annual
- Continuing Education: Not required for L&I registration
Application Process
- Register your business with the Department of Revenue
- Obtain a surety bond or assignment of savings
- Purchase general liability insurance
- Complete the Application for Contractor Registration
- Pay the required application fee
Timeline: 3-4 weeks after all required documents are submitted
Exam-based trade credentials (e.g., electrician, plumber) require passing the state exam before you can serve as a qualifying individual for a contractor business. For non-exam contractor registrations (general, roofing, many specialties), focus on accurate business registration, bond, and insurance documentation to avoid processing delays.
Apply and find current forms and checklists at L&I: Register as a Contractor.
Frequently Asked Questions
How long does it take to get a contractor license or registration in Washington?
For contractor business registrations (general/specialty), L&I typically processes complete applications in about 3–4 weeks. For exam-based trade licenses (electrician, plumber), timelines depend on documenting experience, scheduling, and passing the state exam.
Can I transfer my license from another state to Washington?
Washington does not reciprocate contractor business registration with other states. Limited reciprocity may exist for certain trades (such as plumbing) from select states with similar requirements, but specifics are not listed on the L&I pages cited. Contact L&I to confirm your situation.
What happens if I fail a Washington trade exam?
Retake policies and waiting periods are not specified on the main L&I pages referenced. Contact L&I for current exam scheduling and retake rules for your license type.
Do I need insurance and a bond?
Yes, contractor businesses (general, roofing, and most specialties) must carry liability insurance and a contractor bond to register with L&I. Individuals holding trade licenses (e.g., journeyman electrician or plumber) are not required to carry insurance to hold their individual credential, but their employer or business must meet L&I’s bond and insurance rules.
How often do licenses and registrations renew?
- Electricians (journeyman, master, administrator): Biennial; 24 hours CE each period
- Plumbers (journeyman): Biennial; 24 hours CE each period
- General and Specialty Contractor registrations (including Roofing, Tree Service): Annual; CE not required
- Electrical Trainee: Annual; CE not required for trainee registration
Are there local city or county contractor licenses in Washington?
Our research did not identify additional city-specific contractor licensing in major cities beyond state registration. However, local governments issue building permits and may require a local business license or registration. Always check with the city/county where you plan to work.
Where can I find practice tests for Washington exams?
We offer comprehensive PDF practice tests for Washington trade exams. Each set typically contains 1,500–2,500 questions with precise answer keys and reference locators pointing to exact code sections. Study offline at your own pace with no time or use limits. Browse Washington contractor practice tests.
Washington · Practice tests
Washington contractor license practice tests
The Washington practice tests we publish today: comprehensive PDF guides, typically 1,500 to 2,500 questions each, with full answer keys and reference locators to the exact code sections. We add new tests regularly, so if your license isn’t listed here, contact us and we’ll build it.
- Business, Law, and Project Management (NASCLA) Reference Practice Test
- Installing Hardwood Flooring NOFMA - Reference Practice Test
- National Electrical Code (NEC) 2017 Practice Test
- WAC Chapter 296-46B and Revised Code 19.28 - Reference Practice Test
- Washington 01 General Administrator License Practice Test
- Washington 01 General Electrician License Practice Test
- Washington 01 General Master Electrician License Practice Test
- Washington 02 Residential Administrator License Practice Test
- Washington 02 Residential Electrician License Practice Test
- Washington 02 Residential Master Electrician License Practice Test
- Washington 03 Pump and Irrigation Administrator License Practice Test
- Washington 03 Pump and Irrigation Electrician License Practice Test
- Washington 03 Pump and Irrigation Master Electrician License Practice Test
- Washington 03A Domestic Pump Administrator License Practice Test
- Washington 03A Domestic Pump Electrician License Practice Test
- Washington 03A Domestic Pump Master Electrician License Practice Test
- Washington 04 Signs Administrator License Practice Test
- Washington 04 Signs Electrician License Practice Test
- Washington 04 Signs Master Electrician License Practice Test
- Washington 06 Limited Energy Administrator License Practice Test
- Washington 06 Limited Energy Electrician License Practice Test
- Washington 06 Limited Energy Master Electrician License Practice Test
- Washington 06A HVACR Administrator License Practice Test
- Washington 06A HVACR Electrician License Practice Test
- Washington 06A HVACR Master Electrician License Practice Test
- Washington 06B HVACR Restricted Administrator License Practice Test
- Washington 06B HVACR Restricted Electrician License Practice Test
- Washington 06B HVACR Restricted Master Electrician License Practice Test
- Washington 07 Nonresidential Maintenance Administrator License Practice Test
- Washington 07 Nonresidential Maintenance Electrician License Practice Test
- Washington 07 Nonresidential Maintenance Master Electrician License Practice Test
- Washington 07A Nonresidential Lighting Maintenance & Lighting Retrofit Electrical Administrator License Practice Test
- Washington 07A Nonresidential Lighting Maintenance & Lighting Retrofit Electrician License Practice Test
- Washington 07A Nonresidential Lighting Maintenance & Lighting Retrofit Master Electrician License Practice Test
- Washington 07B Residential Maintenance Administrator License Practice Test
- Washington 07B Residential Maintenance Electrician License Practice Test
- Washington 07B Residential Maintenance Master Electrician License Practice Test
- Washington 07C Nonresidential Maintenance Restricted Administrator License Practice Test
- Washington 07C Nonresidential Maintenance Restricted Electrician License Practice Test
- Washington 07C Nonresidential Maintenance Restricted Master Electrician License Practice Test
- Washington 07D Appliance Repair Administrator License Practice Test
- Washington 07D Appliance Repair Electrician License Practice Test
- Washington 07D Appliance Repair Master Electrician License Practice Test
- Washington 07E Equipment Repair Administrator License Practice Test
- Washington 07E Equipment Repair Electrician License Practice Test
- Washington 07E Equipment Repair Master Electrician License Practice Test
- Washington 09 Telecommunications Administrator License Practice Test
- Washington 10 Door, Gate & Similar Systems Administrator License Practice Test
- Washington 10 Door, Gate & Similar Systems Electrician License Practice Test
- Washington 10 Door, Gate & Similar Systems Master Electrician License Practice Test
Official Sources & References
Official Sources:
-
Washington State Department of Labor & Industries: Electrical Administrators
https://lni.wa.gov/licensing-permits/electrical/electrical-administrators/
Official Board Site | Accessed: 2025-11-07 -
Washington State Department of Labor & Industries: Journeyman Electrician
https://lni.wa.gov/licensing-permits/electrical/journey/
Official Board Site | Accessed: 2025-11-07 -
Washington State Department of Labor & Industries: Master Electrician
https://lni.wa.gov/licensing-permits/electrical/master/
Official Board Site | Accessed: 2025-11-07 -
Washington State Department of Labor & Industries: Electrical Trainee
https://lni.wa.gov/licensing-permits/electrical/trainees/
Official Board Site | Accessed: 2025-11-07 -
Washington State Department of Labor & Industries: Residential Electrical Contractor
https://lni.wa.gov/licensing-permits/electrical/residential/
Official Board Site | Accessed: 2025-11-07 -
Washington State Department of Labor & Industries: Journeyman Plumber
https://lni.wa.gov/licensing-permits/plumbing/journey/
Official Board Site | Accessed: 2025-11-07 -
Washington State Department of Labor & Industries: Plumbing Contractor
https://lni.wa.gov/licensing-permits/plumbing/contractor/
Official Board Site | Accessed: 2025-11-07 -
Washington State Department of Labor & Industries: Register as a Contractor
https://lni.wa.gov/licensing-permits/contractors/register-as-a-contractor/
Official Board Site | Accessed: 2025-11-07
⚠️ Important Disclaimer
Information Currency: This guide reflects licensing information available in 2025. Licensing requirements are subject to change without notice. Always verify current requirements with official sources.
Official Source: For current information, contact Washington State Department of Labor & Industries:
- Website: https://lni.wa.gov
- Phone: 360-902-5800
No Legal Advice: This guide provides general information only. Consult with L&I or a qualified professional for guidance specific to your situation.
Local Requirements: Washington’s cities and counties control permitting and may require local business licensing. Always confirm local rules with the authority having jurisdiction.