Quick Reference Table
Requirement | Details |
|---|---|
License Type | Specialty Contractor Registration – 06A HVAC/Refrigeration |
Regulating Agency | Washington Department of Labor & Industries (L&I) |
Experience Required | No specific experience required for 06A registration |
Exam Required | No state exam; EPA Section 608 required for refrigerant handling |
Renewal Cycle / CE Hours | Every 2 years (biennial); no continuing education required |
Fees (as of March 2025) | $141.10 application/renewal; $15,000 bond; $200,000/$50,000 insurance or $250,000 CSL |
Official Links |
Who Needs a License in Washington?
All businesses and sole proprietors that install, service, or maintain HVAC or refrigeration systems need to register as a specialty contractor in Washington, regardless of project size or dollar amount. There is no minimum project value before registration is required. If you operate as an employee (not business owner) under a registered contractor, you do not need to obtain a separate license.
The law covers HVAC work on both residential and commercial projects. Whether you work for homeowners or businesses, any company offering installation, repair, or maintenance of systems like furnaces, heat pumps, ductwork, air conditioning units, and ventilation must register under the 06A specialty contractor category with L&I. The only exemptions are for homeowners performing work on their own, owner-occupied property (who still need appropriate permits), and for certain limited tasks like simple appliance hookup or warranty/maintenance services within specific criteria.
Special rules apply if your business chooses to employ or subcontract additional trades. As a 06A specialty contractor, you are limited to performing only your licensed specialty work and cannot subcontract unrelated specialties. Only general contractors may hire other licensed trades. Your employees do not need separate L&I registration unless they operate independent businesses.
HVAC License Types in Washington
Washington offers only one business-level HVAC license: the 06A – HVAC/Refrigeration specialty contractor registration. All work involving the installation, maintenance, or repair of heating, ventilation, air conditioning, and refrigeration systems is covered under this classification.
The 06A license allows your business to perform a range of HVAC activities, including:
Installing, maintaining, and repairing HVAC and refrigeration equipment (furnaces, AC units, heat pumps)
Working on ductwork and ventilation systems
Handling refrigerant systems if EPA certified (Section 608)
Replacing thermostats and standard controls
However, you cannot perform electrical work beyond basic unit hookup or gas piping past appliance connections. Separate registration or certification is required for electrical (01 or 07) or plumbing work. If you wish to offer broader services, you must obtain each specialty registration individually, as combined licenses do not exist in Washington.
How to Get Licensed in Washington
To meet HVAC license requirements in Washington, HVAC businesses must complete several documented steps with the Department of Labor & Industries. There are no state trade exams or minimum years of experience required, but specific business and bonding steps must be followed precisely.
Form your business entity and obtain a Unified Business Identifier (UBI):
Start by forming your business structure (e.g., LLC, corporation, sole proprietorship) with the Washington Department of Revenue. Obtain your UBI number, which is required for L&I licensing steps.
Secure your bond and insurance:
Arrange a $15,000 continuous surety bond and purchase general liability insurance, either $200,000 public liability with $50,000 property damage, or $250,000 as a combined single limit. Name L&I as certificate holder on your insurance policy.
Complete the L&I Specialty Contractor Application:
Fill out form F625-001-000 to register as a specialty (06A) contractor. This form requires notarized signatures, business details, and proof of the required bond and insurance.
Submit your application, bond, and insurance:
Take or mail your complete application packet (form, bond, insurance certificates, and $141.10 fee) to any local L&I office. Applying in person may speed up the process compared to mailing.
Wait for processing and receive your registration card:
L&I takes roughly 3–4 weeks to process mailed applications. In-person filing is usually faster. You will receive your specialty registration card by mail, generally within two weeks of approval.
Verify your official contractor status online:
Before you accept contracts, use the L&I "Verify a Contractor, Tradesperson or Business" tool to ensure your business is publicly listed and properly registered. Share your registration details with customers and building officials as needed.
No additional background check or fingerprinting is required for 06A specialty contractor registration. All documents must be current, original, and valid at the time of application.
EPA Section 608 Certification
If your HVAC work involves refrigerant handling (charging, recovering, or repairing refrigerant circuits), at least one person in your company must hold a current EPA Section 608 certificate. Washington does not administer this test, but you must have valid federal documentation before starting refrigerant work.
Application Requirements
HVAC license requirements in Washington start with running a legitimate business and securing strict legal protections for clients and the public. Below are the main requirements for L&I 06A specialty contractor registration.
Business Formation and UBI
You must legally form your business in Washington and register with the Department of Revenue to obtain a UBI (Unified Business Identifier) number. All owners and partners must supply full legal names and addresses on the contractor application form. There is no specified minimum age or citizenship requirement for applicants, but you must supply your business’s legal paperwork.
Bond Requirements
Your HVAC business must provide proof of a continuous surety bond in the amount of $15,000. The bond is a consumer protection guarantee. It covers any claims made by clients for shoddy work, unpaid suppliers, or violations of contracting rules. The bond must remain in force at all times and is available from most commercial bonding agencies. L&I must be listed as the party the bond protects.
Insurance Requirements
General liability insurance is mandatory for all 06A HVAC specialty contractors. Your policy must cover a minimum of $200,000 for public liability and $50,000 for property damage. Alternatively, a combined single-limit policy of at least $250,000 is acceptable. The policy must list L&I as the certificate holder. Provide original certificates with your application. If insurance lapses, your license will be suspended until coverage is reinstated.
EPA Certification
If your business or any employee will be handling refrigerants, you must present proof that you (or at least one tech) hold the federal EPA Section 608 certification for refrigerant management. This requirement ensures compliance with federal air quality regulations. You do not need to submit the certificate to L&I unless specifically requested, but you must have it available for inspection.
No Experience or Background Check
Washington does not require proof of years of HVAC experience, formal journeyman status, or a criminal background check for specialty contractor registration. However, all documents, including insurance and bond, must be active and meet state standards at the time of application.
Exams
You do not need to take a Washington state trade exam to obtain the 06A HVAC specialty contractor registration. L&I issues registration solely on correct paperwork, business formation, bond, and insurance documentation. There are no state-mandated technical or business exams for HVAC business licensing.
However, if you plan to handle refrigerants, federal law (outside of L&I) requires that you or any employees performing such work pass the EPA Section 608 certification exam. This exam tests your knowledge of safe refrigerant handling and environmental laws. EPA 608 certification is offered through national providers, and is not administered or recorded by the state. You must keep EPA 608 certificates current and available on-site when performing relevant work.
If your business crosses into electrical or plumbing trades as part of HVAC, Washington requires separate (and exam-based) licensing for those disciplines. Verify at L&I's official contractor registration page for up-to-date test information for those trades.
Fees
The following fees apply when registering or renewing as a 06A HVAC specialty contractor in Washington, accurate as of March 2025:
Specialty contractor registration (application or renewal): $141.10 every two years (source March 2025, Washington Contractor Directory).
Surety bond required: $15,000 continuous (latest amount, as of July 2024, L&I official page).
General liability insurance: $200,000 public liability plus $50,000 property damage, or $250,000 combined single limit (see L&I insurance info). Actual insurance policy premium cost is not set by the state.
Exam fee: No state exam required. EPA Section 608 refrigerant exam fee is not listed on L&I state sources; check with national providers for current charges. (Verify at federal and provider websites.)
Late/penalty fees: No late or reinstatement fee is mentioned for specialty contractor renewal on official L&I pages as of March 2025. (Verify at L&I fee schedule.)
All registration, bond, and insurance documentation must remain continuously valid to avoid suspension of business rights.
Renewal and Continuing Education in Washington
All 06A specialty contractor registrations must be renewed every two years to stay compliant with HVAC license requirements in Washington. Contractors are responsible for tracking their own deadlines and submitting full renewal paperwork and fees before expiration.
Renewal Process
Renewal applications may be submitted online or by mail using the renewal card that L&I mails to your business address. The renewal fee is the same as the original application cost: $141.10 as of March 2025. Contractors must verify that their surety bond and insurance policies remain effective and unexpired when filing a renewal. Failure to maintain bond or insurance may result in immediate suspension of your registration, which prevents legal bidding or contract work until fixed.
Continuing Education
Washington does not require any specific continuing education (CE) for renewal of 06A specialty contractor status. However, you are encouraged to stay up to date on code changes and federal requirements, especially EPA rules for refrigerants. Should the rules change in the future, you must update your procedures accordingly. If CE requirements are ever introduced, L&I will update the renewal terms.
Consequences of Lapsed Registration
While official sources do not give details on late filing or reinstatement fees, if your license lapses, you must re-register anew and cannot lawfully bid or perform work until your specialty contractor registration is restored. Always keep your expiration date on file and submit all paperwork and fees early to avoid business disruption.
Reciprocity
HVAC license requirements in Washington do not include any formal reciprocity or endorsement arrangements for the 06A specialty contractor classification. If you are licensed as a similar HVAC contractor in another state, you must still complete the full Washington registration process, including business formation, bond, and insurance.
For those doing only electrical or plumbing work under specific scopes, some limited reciprocity rules exist (for instance, plumbing reciprocity with Idaho). However, these rules do not apply to the main 06A HVAC specialty. No state-by-state endorsement is recognized for general HVAC registration in Washington. Always plan ahead and begin paperwork early if you are moving or expanding your business into the state.
Official Links
L&I Contractor Registration Overview (agency board and application details)
L&I Verify a Contractor Tool (verify active registration and insurance/bond status)
Form F625-001-000 Application for Contractor Registration (fillable PDF linked from L&I page)
For further tools and guides, see the CloseCrew HVAC licensing resource hub (for general guidance only).
