Washington Contractor Licenses

The Washington State Department of Labor & Industries (L&I) enforces regulations related to Providers, Businesses, and Workers to ensure safe and up-to-code practices. At the same time, the Department of Labor & Industries is the entity responsible for licensing construction contractors in the State of Washington. Washington’s Department of Labor & Industries distinguishes between seven construction license categories, depending on the Board that handles the issuing, the type of work, the application requirements, and the examination process: General and Specialty contractor licenses; Plumbing licenses & certifications; Electrical licenses & certifications; Elevator contractor licenses; Mobile Home Installation certifications; Boiler licenses; and Asbestos licenses.

Washington has designated several testing companies to administer the contractor examinations depending on the license category. PSI© is the company in charge of administering the license exams for electrical and plumbing licenses. Contractor examinations for mobile home installation certifications and elevator licenses are managed by the Department of Labor & Industries (L&I) itself. The National Board of Boiler and Pressure Vessel Inspectors administers the boiler license examinations. Finally, applicants for asbestos licenses must take a test that is part of the training program that has to be completed.

Below is a list of all Contractor Licenses in Washington with their corresponding information on the overall process to obtain the classification chosen.

General and Specialty Contractor Licenses

All construction contractors must be registered with the Washington State Department of Labor & Industries. Chapter 296-200A of the Washington Administrative Code provides all the information and regulations on registering as a contractor.

The Department of Labor & Industries distinguishes between two main contractor registration classifications: general and specialty contractors. General contractors can perform almost all types of construction work and can hire subcontractors of different specialties. Specialty contractors can only perform work specific to the specialty registered in and are not allowed to subcontract for work.

Washington General and Specialty Official Classification List

How to Apply for a General/Specialty License in Washington?

1. Determine the business type and register with the Department of Revenue:
   • If setting up a sole proprietor or partnership, determine the business name
   • If starting a Limited Liability Company (LLC) or a Corporation, refer to the Secretary of State for information on how to incorporate the business
2. Complete and get a Washington Continuous Contractor Surety Bond for the required amount
3. Purchase a general liability insurance policy for the required amount
4. Fill out an Application for Contractor Registration with notarized signatures. If unsure of how to correctly fill out the application form, the Washington State Department of Labor & Industries offers help with the application and business registration to those who visit their local offices
5. Gather all the previous documents and send them with the registration fee to:
   Washington State Department of Labor & Industries
   Contractor Registration
   P.O. BOX 44450
   Olympia, WA 98504-4450
   It is also possible to visit a local office to deliver all the documents and fees
6. Expect a registration card from the Washington State Department of Labor & Industries after the application is processed
7. Note that once the business has been registered, it will be listed in the Washington State Department of Labor & Industries Verify a Contractor, Tradesperson, or Business website

General & Specialty Contractor License Contact Information and Useful Links

Useful Links for General & Specialty Contractors in Washington

• Department of Labor & Industries Licensing
• Register as a Contractor
• Washington Legislature on Registering as a Contractor
• Contractor Overview Module
• List of Washington Department of Labor & Industries Offices
• Guide for Applying for a Washington Business License
• Contractor Training and Workshops
• List of Specialty Contractor Licenses in Washington

Contact Information for General & Specialty Contractors in Washington

Washington State Department of Labor & Industries

Department of Labor & Industries
7273 Linderson Way SW
Tumwater, WA 98501-5414
Toll-free: 1-800-647-0982
360-902-5226
This email address is being protected from spambots. You need JavaScript enabled to view it.

Washington Plumbing Licenses & Certifications

The Plumber Advisory Board is a Board under the Washington State Department of Labor & Industries in charge of the Plumber Certification Program. The plumber certification program certifies plumbing professionals and ensures that their work meets State requirements. For further information on the State dispositions for plumbing work, refer to Chapter 18.106 of the Revised Code of Washington.

Plumbing Licenses & Certifications

• Backflow (PL30)
• Domestic Well (PL03A)
• Journey Level Plumber (PL01)
• Medical Gas Piping Installer (MG01)
• Pump and Irrigation (PL03)
• Residential (PL02)
• Residential Service (PL04)

How to Get a Plumbing License or Certification in Washington?

1. Have experience as a Plumber Trainee. If you don’t have experience as a Plumber Trainee, meet the following requirements and apply for a Plumbing Trainee certificate:
   • Be at least 16 years of age
   • Work under the supervision of a journey level or certified plumber
   • Take 8 hours of plumbing code and 4 hours of electrical classes in two years
2. Fill out anAffidavit of Experience to report the supervised work hours as a plumber trainee
3. Meet the required experience or education depending on the license applying for:

   • Journey Level Plumber (PL01): 8,000 hours as a plumber trainee and 4,000 hours working in commercial/ industrial installations
   • Medical Gas Piping Installer (MG01): Complete a minimum of 32 hours of training in a medical gas training course
   • Residential (PL02): 6,000 hours of experience under the supervision of a Residential or Journey Level plumber
   • Residential Service (PL04): 4,000 hours as a plumber trainee under the supervision of a Journey Level, Residential or Residential Service plumber
   • Pump and Irrigation (PL03): 4,000 hours working under the supervision of a certified plumber, except a Pump and Irrigation (PL30) or a Domestic Well (PL03A) plumber
   • Domestic Well (PL03A): 2,000 hours under the supervision of a certified plumber, except a Pump and Irrigation Plumber (PL30)
   • Backflow (PL30): Have an active Backflow Assembly Tester Certification issued by the Washington State Department of Health
4. Fill out and notarize an Application for Contractor License or a Combination Contractor Application if applying for the Pump and irrigation (PL03) and the Domestic well (PL03A) licenses
5. Complete and obtain a Surety Bond or Assigned Savings Account
6. Get a Certificate of Liability Insurance
7. Choose a designated plumber to hold the valid plumber certificate. The designated plumber can be another person or the applicant, depending on whether they are applying as a business or as a sole proprietor
8. Satisfy the following educational requirements and apply for the plumber examination with PSI©:
   • Journey Level Plumber (PL01), Residential (PL02), and Residential Service (PL04) plumbers - 24 hours of continuing education, including:

     • 12 hours of Uniform Plumbing Code
     • 4 hours of Industry-Related Electrical
     • 8 hours in any Code, Industry-Related Electrical, or Industry-Related Plumbing area
   • Pump and Irrigation (PL03) and Domestic Well (PL03A) plumbers:

     • 24 hours of combination classes that cover plumbing and electrical subjects, or
     • 12 hours of plumbing and 12 hours of electrical education
   • Backflow (PL30) plumbers - No educational requirements; only a copy of an active Backflow Assembly Tester card is needed
   • Medical Gas Piping Installers (MG01) - A notarized Affidavit of Continuity to report applicable brazing experience. brazing experience must be certified every 6 months
9. Refer to PSI© Plumbing Examinations Candidate Information Bulletin. For more information on the test (locations, subjects, books to prepare for the exam)
10. Submit a complete packet with all the required documents to:
    Washington State Department of Labor & Industries
    Plumber Certification
    PO Box 44470
    Olympia WA 98504-4470

Important Links and Contact Information for Plumbing Licenses & Certifications

Useful Links for Plumbing Contractors in Washington

• Washington State Department of Labor & Industries Plumber Program
• Plumber Licensing FAQs
• Licensing Requirements for Plumbing Contractors
• Plumber Application Portal
• Out-of-State Plumbing Applicants
• PSI© Washington Plumber Examinations
• Plumber Examinations Information for Candidates

Contact Information for Plumbing Applicants

Plumber Certification Program

Washington State Department of Labor & Industries
Plumber Certification
PO Box 44470
Olympia WA 98504-4470
360-902-5207
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PSI© Exams

PSI© Contact Website
(855) 746-8170
​3210 East Tropicana
Las Vegas NV-89121

Electrical Licenses & Certifications

The Electrical Board is an entity under the Washington State Department of Labor & Industries that enforces the dispositions of Chapter 19.28 of the Revised Code of Washington. It is also the entity in charge of administering the licensing process for electrical-related licenses and certification in the State of Washington. The Electrical Board distinguishes different licenses and certifications: trainee, electrician, electrical administrator, telecommunications administrator, electrical contractor, a telecommunications contractor, and master electrician.

How to Apply for the Electrical Trainee License in the State of Washington?

To become certified electricians in Washington, contractors must first obtain an Electrical Trainee certification. Trainees work under the supervision of certified electricians. After acquiring the necessary experience to be eligible for a contractor examination, trainees can apply for an electrician license.

1. Meet the following requirements:
   • Be 16 years of age
   • Have a valid Social Security Number according to State and Federal law
2. Register in an electrical apprenticeship program through the Apprenticeship Registration & Tracking System:
   • Construction Electrician
   • Inside Electrician
   • Inside Wireman
3. Fill out and submit an online application and pay the corresponding fee
4. Expect a training certificate within 10 business days after completing the application
5. Make sure to work under the supervision of a certified electrician
6. Report your hours of experience 180 days after the expiration date of the training certificate by submitting an Affidavit for Washington Electrical Trainees

Washington Electrician Licenses & Certifications

• Appliance Repair (7D)
• Domestic Well (3A)
• Door, Gate, and Similar Systems (10)
• Equipment Repair (7E)
• General Journey Level Electrician (EL01)
• HVAC/Refrigeration - Restricted (6B)
• HVAC/Refrigeration System (EL06A)
• Limited Energy System (EL06)
• Nonresidential Maintenance (EL07)
• Nonresidential Lighting Maintenance and Lighting Retrofit (7A)
• Pump and Irrigation (EL03)
• Residential (EL02)
• Residential Maintenance (7B)
• Restricted Nonresidential Maintenance (7C)
• Signs (EL04)

Application Process for Electrician Licenses & Certifications in Washington

1. Be an electrical trainee or have equivalent out-of-state or military experience
2. Meet the experience and training requirements:
   You can use the Washington Department of Labor & Industries’ tool to verify the hours of experience
   • General Journey Level Electrician (EL01):
     • 8,000 hours, of which 4,000 must be spent working in commercial or industrial installations, as an electrical trainee under the supervision of a Journey Level Electrician
     • 96 hours of basic classroom instruction
     • Be supervised 75% of the time
   • Residential (EL02), Pump and Irrigation (EL03), Signs (EL04), Limited Energy System (EL06), HVAC/Refrigeration System (EL06A), Nonresidential Maintenance (EL07):
     • 4,000 hours of work experience related to the selected specialty as an electrical trainee
     • 48 hours of basic classroom instruction
     • Be supervised 75% of the time
   • Domestic Well (3A), HVAC/Refrigeration - Restricted (6B), Nonresidential Lighting Maintenance and Lighting Retrofit (7A), Residential Maintenance (7B), Restricted Nonresidential Maintenance (7C), Appliance Repair (7D), Equipment Repair (7E), Door, Gate, and Similar Systems (10):
     • 2,000 hours of work experience related to the selected specialty as an electrical trainee
     • 24 hours of basic classroom instruction
     • Be supervised 75% of the time
3. Fill out the corresponding application form for the electrical examination:
   • In-State Application for Electrical Examination for Journey Level or 4,000-hour electricians
   • Electrical Specialty Application Form for 2,000-hour electricians
   • Out-of-State Application for Electrical Examination
4. Mail the application and the documents needed to certify the experience required for each license to:
   Electrical Licensing and Certification
   PO Box 44460
   Olympia WA 98504-4460
5. Register to PSI© and schedule the examination once the application is reviewed by the Washington State Department of Labor & Industries. For more information on the test, refer to PSI©’s Electrical Certification Candidate Information Bulletin

Washington Electrical Administrator Licenses and Certifications

• Electrical Administrator Appliance Repair (7D)
• Electrical Administrator Domestic Well (3A)
• Electrical Administrator Door, Gate, and Similar Systems (10)
• Electrical Administrator Equipment Repair (7E)
• Electrical Administrator General (AD01)
• Electrical Administrator HVAC/Refrigeration - Restricted (6B)
• Electrical Administrator HVAC/Refrigeration System (EL06A)
• Electrical Administrator Limited Energy System (EL06)
• Electrical Administrator Nonresidential Lighting Maintenance and Lighting Retrofit (7A)
• Electrical Administrator Nonresidential Maintenance (EL07)
• Electrical Administrator Pump and Irrigation (EL03)
• Electrical Administrator Residential (EL02)
• Electrical Administrator Residential Maintenance (7B)
• Electrical Administrator Restricted Nonresidential Maintenance (7C)
• Electrical Administrator Signs (EL04)
• Telecommunications Administrator

How to Apply for a Washington Electrical Administrator License or Certification?

1. Check out the scope of work for each electrical administrator license and choose the one more closely to the desired field
2. Register with PSI© to take the electrical administrator examination in Washington
3. Refer to the official exam outline for information on how to schedule the exam and choose the preferred location
4. Fill out a Change Assignment of Administrator/Master Electrician Certificate form to be assigned to an electrical contractor
5. Mail the passing score reports within 90 days of the date of the report, the Change Assignment of Administrator/Master Certificate form, and the fee to:
   Department of Labor and Industries
   Electrical Program
   P.O. Box 44460
   Olympia, WA 98504-4460
6. Expect the certificate within 5 days after the Electrical Board receives all the documentation

Washington Electrical Contractor Licenses and Certifications

• Electrical Contractor
• Telecommunications Contractor

How to Obtain an Electrical Contractor License in Washington?

1. Meet the license requirements for electrical contractors:
   • A valid Unified Business Identifier number from the Department of Revenue or the Secretary of State
   • Have a certified, assigned electrical administrator or master electrician
   • Electrical or telecommunication contractor’s surety bond, or assignment of savings account
   • If the business is planning on hiring employees, obtain a workers’ compensation account
2. Fill out and complete the following documents:
   • Application for Electrical or Telecommunication Contractor’s License
   • Change Assignment of Administrator/Master Certificate (a notarized copy)
   • Electrical/Telecommunications Contractor's Bond or Electrical/Telecommunications Contractor Assignment of Savings Account
   • Certificate of general liability insurance
3. Send all the documents and the corresponding fees to:
   Washington State Department of Labor & Industries
   Electrical Program
   P.O. Box 44460
   Olympia, WA 98504-4460

Washington Master Licenses and Certifications

• Journey Level Master Electrician
• Master Appliance Repair (7D)
• Master Domestic Well (3A)
• Master Door, Gate, and Similar Systems (10)
• Master Equipment Repair (7E)
• Master HVAC/Refrigeration - Restricted (6B)
• Master HVAC/Refrigeration System (EL06A)
• Master Limited Energy System (EL06)
• Master Nonresidential Lighting Maintenance and Lighting Retrofit (7A)
• Master Nonresidential Maintenance (EL07)
• Master Pump and Irrigation (EL03)
• Master Residential (EL02)
• Master Residential Maintenance (7B)
• Master Restricted Nonresidential Maintenance (7C)
• Master Signs (EL04)

Instructions to Apply for a Washington Master License or Certification

1. Satisfy the requirements for the corresponding certification level:
   • For the Journey Level Master Electrician, be certified as a General Journey Level Electrician (EL01) for at least four years
   • For the other master licenses, be certified as an electrician for at least 2 years
2. Gather the following before applying for the examination with PSI©:
   • Social Security Number
   • Mailing address
   • Email address
   • Corresponding fees
3. Fill out the Application for Master Electrician Certification Examination and send it, along with all the previous documents, to:
   Electrical Program
   PO Box 44460
   Olympia, WA 98504-4460
   The Washington State Department of Labor & Industries allows candidates to apply in person. Refer to the list of local offices before visiting
4. Expect a notice by mail from the Labor & Industries department and instructions on scheduling the exam once the application is reviewed
5. Take and pass the master examination. For further information on the subjects and study material needed to prepare for the exam, refer to the Candidate Information Bulletin
6. Complete a Change Assignment of Master Certificate form to be assigned as a designated master electrician to an electrical contractor and submit it with the corresponding fee

Important Contact Information and Resources for Electrical Licenses & Certifications in Washington

Contact Information for Electrical Licenses and Certifications

Department of Labor & Industries

Electrical Program
Olympia, WA 98504-4460
360-902-5259
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PSI© Exams

PSI© Contact Website
(855) 746-8170
​​3210 East Tropicana
Las Vegas NV-89121

Helpful Links for Electrical Licenses & Certifications in Washington

• Department of Labor & Industries
• Washington Electrical Board
• Electrical Licenses Application Process
• Electrical Licensing and Examination
• Electrical Certification Candidate Information Bulletin
• Revised Code of Washington Electrical Dispositions

Elevators Contractor Licenses

The Department of Labor & Industries L&I regulates elevator licenses in Washington through the Elevator Program. Within this program, there are two main elevator license classifications: the Elevator Contractor license and the Elevator Mechanic License. The main difference between them is that the elevator contractor’s license allows a person to employ licensed elevator mechanics and bid on public and private contracts but does not allow the contractor to personally work on an elevator. However, applicants may obtain elevator contractor and mechanic licenses if they meet the requirements and pass the tests.

How to apply for the Elevator Contractor License?

1. Be registered as a contractor with the L&I Department
2. Fill out and submit a completed Licensed Elevator Contractor (LC) Operation form
3. Have at least 5 years of experience performing conveyance work, which needs to be verified by current or previous elevator contractors licensed to do business or take and pass the multiple-choice examination
   • The exam is administered by the L&I Department, which can be reached at 360-902-6130 or by email at This email address is being protected from spambots. You need JavaScript enabled to view it.
   • Must pass with a minimum score of 70%
4. Expect an answer from the department in regards to the license

Elevator Mechanic Licenses

The Elevator Mechanic Licenses are divided into two main categories; General and Specialty. The Specialty Elevator Mechanic License is divided into several categories with different qualification requirements depending on the category selected.

• General Elevator Mechanic (Category 01)
• Commercial and Residential (Category 02)
• Industrial Sites and Grain Terminals (Category 03)
• Temporary and Special Purpose Conveyances (Category 04)
• Material Lifts (Category 05)
• Limited Residential (Category 06)
• Residential Inclined Elevators (Category 07)
• Employees of Public Agencies (Category 08)
• Temporary Elevator Mechanic License (Category 09)
• Emergency Elevator Mechanic License (Category 10)

How to apply for an Elevator Mechanic License by Category?

Steps to apply for categories 01-08:

1. Submit an Application for Licensure as an Elevator Mechanic
2. Meet the experience and education requirements for each license:
   • Categories 01, 02, 03, 04 and 08 must have a minimum of three years’ work experience in the elevator industry performing conveyance work which must be verified by current and previous employers licensed to do business in Washington or as an employee of a public agency
   • Category 05 does not need to meet any specific educational or experience requirements to be obtained
   • Category 06 must have a minimum of two years of experience in the Elevator trade performing conveyance work which needs to be verified by a current or prior employer licensed to do business in the State of Washington
   • Category 07 must have a minimum of 1 year of experience in the elevator industry or 3 years of education in conveyance work. Either option must be verified by a previous or current employer
3. Pass the examination administered by the National Elevator Industry Educational Program. For more information, contact them at 800-228-8220
4. Expect an answer from the Department of Labor & Industries in regards to the license

Temporary Elevator Mechanic (Category 09):

1. Complete 75% of the education and experience requirements in the area of specialty
2. Reach out to the Labor & Industries Department to obtain the license

The Temporary Elevator Mechanic (Category 09) license is usually given to elevator trainees or apprentices enrolled in a qualifying program, qualified, out-of-state, licensed mechanics working temporarily in Washington, and qualified mechanics who are waiting on their permanent credentials to be approved by L&I. These licenses may be restricted to a specific conveyance or a geographical area. Note that a licensed elevator contractor must certify the licensee's qualifications and competency to obtain the license and that his license is only valid for a year, after which it may be renewed.

Emergency Elevator Mechanic (Category 10):

1. Must have an acceptable combination of documented experience and education to perform elevator work without direct and immediate supervision
   • This is only issued during a declared state of emergency and is only valid for 30 days
2. Contact the department for license issuance

Contacts & Useful Links for Elevator Licenses in Washington

Contact Information for Elevator Licenses

Washington State Department of Labor & Industries

Elevator Program
PO Box 44480
Olympia WA 98504
Toll-free: 1-800-705-1411
360-902-6130
Fax: 360-902-6132
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National Elevator Industry Educational Program

Educational Program
11 Larsen Way, Attleboro Falls,
MA 02763
800-228-8220
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Useful Links for Elevator Contractor Licenses

• Washington Department of Labor & Industries
• Exam Information for Elevator Licenses
• Washington Elevator Program
• Elevator Mechanic & Helpers
• Elevator Contractor License

Mobile Home Installation Certifications

In the State of Washington, the installation of mobile homes must be performed by an installer certified by the Labor & Industries Department. The Manufactured/Mobile Home Installer is currently the only Home Installation license offered by the Factory Assembled Structures (FAS) Advisory Board, which allows a person to perform the following installation work regarding home installation of construction of the foundation, assembly of the home, connecting the home to utilities and application of the skirting.

How to get a Manufactured/Mobile Home Installer license in Washington?

1. Fill out and submit a completed Application for Manufactured Home Installer Training and Certification, along with the corresponding fee
   • Issue a check or money order addressed to the Department of Labor & Industries and mail it to their PO Box: Factory Assembled Structures PO Box 44420 Olympia WA 98504-4420
   • Note that applications must be received before the cutoff date, or else the application might be scheduled for the next available class
2. Take the training course offered by the Department of Labor & Industries, which may be accessed online, and pass the 3-hour examination with a minimum score of 70%
   • The applicant must wait for application approval to take the training and examination
3. If approved, expect the department to issue the Installer Certification License

The Program also offers a “Training Only" option, which allows a person to take the training course without the exam. This option is usually preferred by any individual interested in the training content without needing certification.

For more information regarding the license requirements and examination details, please refer to the L&I website or contact The Board by phone at 1-800-705-1411 Option 3 or by email at This email address is being protected from spambots. You need JavaScript enabled to view it.

Mobile Home Installation Certifications Contact Information & Useful Links

Useful Links

• Washington State Department of Labor & Industries
• Factory Assembled Structures Advisory Board
• Application for Manufactured Home Installer Training and Certification
• Licensure Information for Installers

Contact Information

Washington State Department of Labor & Industries

7273 Linderson Way SW
Tumwater, WA 98501-5414
Toll-free:1-800-647-0982
360-902-5226
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Factory Assembled Structures Advisory Board

7273 Linderson Way SW
Tumwater, WA 98501
Toll-free: 1-800-705-1411 Option 3
Fax: 360-902-5229
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Boilers Licenses

The Boiler Program is in charge of issuing Boiler permits and performing inspections for boilers and pressure vessels in the State of Washington. The Boiler Program currently offers two licenses related to Boiler work; Boiler and Pressure Vessel Inspector and Boiler Operator

For inspectors, the Program issues a work card through The Department of Labor & Industries, which allows an inspector to perform work within the state. As for the Boiler Operator license, a license is not needed in the State of Washington. Nonetheless, three cities are the exception to this since they require a valid license to perform Boiler work. These cities, along with their licensure information and contact numbers, are listed below:

• Seattle - 206-684-5174
• Spokane - 509-625-6313
• Tacoma - Bates Technical College - 253-680-7400

How to get the Washington Boiler and Pressure Vessel Inspector License?

In the state of Washington, all Boiler and Pressure vessel inspectors must have a "work card" issued by L&I. The applicant must meet the following steps to qualify for a work card.

1. Submit an Application for Certificate of Competency as an Inspector of Pressure Retaining Items
   • Note that the application must be received 30 days before the examination date
2. Take and pass the National Board and the Washington State boiler examination
   • Boiler Inspector exams are provided by request. For further information regarding exam scheduling or information on the exam, please reach out to the Boiler Program's Administrative Assistant Jamie Brown, Secretary Supervisor, at 360-902-5271 or at This email address is being protected from spambots. You need JavaScript enabled to view it.
3. Submit the corresponding examination fee

Boilers Licenses Contact Information & Useful Links

Useful Links

• Department of Labor & Industries
• Boiler Program Information
• National Board of Boiler and Pressure Vessel Inspectors
• Application for Licensure

Contact Information

Boiler & Pressure Vessel Program

Washington State Department of Labor & Industries
Boiler/Pressure Vessel Program
PO Box 44410
Olympia WA 98504-4410
360-902-6400
Fax: 360-902-5292
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Washington State Department of Labor & Industries

7273 Linderson Way SW
Tumwater, WA 98501-5414
Toll-free:1-800-647-0982
360-902-5226
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Jamie Brown, Secretary Supervisor

360-902-5271
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National Board of Boiler and Pressure Vessel Inspectors

1055 Crupper Avenue
Columbus, Ohio 43229-1183
Phone:614-888-8320
Fax: 614-888-0750
Email:This email address is being protected from spambots. You need JavaScript enabled to view it.

Asbestos Licenses

In the State of Washington, Asbestos Licenses are regulated by the Asbestos Certification Program through the Department of Labor & Industries. These licenses allow a person to perform asbestos-related work on construction sites, and they are categorized into three different classifications, Asbestos Contractor License, Asbestos Supervisor License and Asbestos Worker License.

How to get an Asbestos License in Washington?

To obtain any of the three Asbestos Licenses, the applicant must follow the steps that pertain to the license chosen.

1. Meet the pre-requirements for the desired license:
   • The Asbestos Supervisor License requires at least 1600 hours of experience in one or more of the following subjects:
     • Asbestos abatement
     • Asbestos project design
     • Consultation on asbestos abatement projects
     • Asbestos operations and maintenance program supervision
     • Asbestos construction project supervision
   • The Asbestos Contractor license requires an active contractor registration with the Department of Labor & Industries and a Washington-certified Asbestos Supervisor on the applicant’s payroll
   • The Asbestos Worker License does not have any pre-requisites
2. Complete and approve the training course with an exam score of 70% or higher
   • For an Asbestos Supervisor License, the applicant must attend the 40-hour training course and must pass a 100-question multiple-choice exam
   • For an Asbestos Worker License, the applicant must take a 32-hour training course and a 50-question multiple-choice exam
   • Asbestos Contractor License does not require an exam
3. Fill out and submit an initial application notarized by an approved training course sponsor (the training course sponsor requirement does not apply to the Asbestos Contractor application)
   • Asbestos Supervisor Certified Application
     • Supervisors must attach an approved affidavit of experience from past or current employers verifying hours of experience along with the application
   • Asbestos Worker Certified Application
   • Asbestos Contractor New Application for Certification
4. Pay the corresponding fee to The Department of Labor & Industries
5. Expect an answer from the Department regarding the Certification card. Please note that cards may take up to 6 weeks to arrive

Please note that Asbestos licenses are valid for one year after course completion (for Workers and Supervisors) and one year after contractor registration with the Department (for Contractors). After that time, the applicant must renew their certificate. For further questions, please contact the Asbestos Program at 360-902-5435 or This email address is being protected from spambots. You need JavaScript enabled to view it..

Asbestos Licenses Contact Information & Useful Links

Useful Links

• Washington Asbestos Information Site
• Department-Approved Sponsors for the Training Course
• Training Course Content and Steps for Licensure - Workers and Supervisors
• Asbestos Contractor Application Process

Contact Information

Asbestos Certification

Washington State Department of Labor & Industries
Asbestos Certification Program
PO Box 44614
Olympia WA 98504-4614
360-902-5435
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Washington State Department of Labor & Industries

7273 Linderson Way SW
Tumwater, WA 98501-5414
Toll-free:1-800-647-0982
360-902-5226
This email address is being protected from spambots. You need JavaScript enabled to view it.