Washington HVAC contractor license: Complete 2026 Guide

Official-source review: August 25, 2026

Washington HVAC contractor license: Washington does not issue one all-purpose HVAC technician license. The business normally registers as an HVAC specialty contractor, while employees performing regulated HVAC electrical work need 06A or restricted 06B specialty electrician certificates and the business needs the matching electrical contractor license.

Fast answer: Register the HVAC business as a specialty contractor with a $15,000 bond and required liability insurance. For electrical work, use 06A after 4,000 specialty hours or restricted 06B after 2,000 hours, pass the Washington exam, and work through a matching electrical contractor. Obtain EPA Section 608 certification before handling regulated refrigerants.

Washington HVAC contractor license requirements experience examination fees renewal and official sources — Washington requirements summarized from the responsible agencies. Local permits, employers and certifying bodies may impose additional conditions.

What the Washington HVAC contractor license covers

Washington does not issue one all-purpose HVAC technician license. The business normally registers as an HVAC specialty contractor, while employees performing regulated HVAC electrical work need 06A or restricted 06B specialty electrician certificates and the business needs the matching electrical contractor license.

HVAC specialty contractor registration for mechanical installation and service.
06A electrical work within HVAC and refrigeration equipment without the 06B voltage and amperage cap.
06B restricted electrical work within its 250-volt single-phase and 120-amp limit.
EPA-certified refrigerant work and local mechanical/electrical permits.

General electrical work follows the Washington electrician route.

Washington HVAC contractor license requirements at a glance

Requirement	Current rule or route
Route	L&I specialty contractor registration plus 06A or restricted 06B electrical credentials for covered HVAC electrical work
Eligibility	06A requires 4,000 hours in the specialty; 06B requires 2,000 hours under the published supervision rules. Mechanical-only contractor registration has no trade-exam experience threshold.
Exam	Washington 06A or 06B electrical examination for persons performing covered electrical work; EPA-approved Section 608 examination for refrigerant handling.
Fees	Contractor registration is $150.20 for two years. Electrical trainee, examination, certificate and electrical-contractor fees are additional.
Bond or insurance	Specialty contractor registration requires a $15,000 bond and either $200,000 public liability plus $50,000 property damage or a $250,000 combined limit.
Renewal	Contractor registration every two years; specialty electrician certificate every three years.

Do not treat this table as an approval notice. The agency, certification organization or local jurisdiction makes the final eligibility decision and may request additional evidence.

How to complete the Washington HVAC contractor license process

Confirm the correct credential and scope.
Complete required training and experience.
Pass the required examination.
Submit the application and fees.
Complete business licensing, bond and insurance requirements.
Obtain permits and renew on time.

Keep copies of every experience certificate, examination result, bond or insurance filing and payment receipt. Names and business entities should match across the application and supporting documents.

Important Washington rules and boundaries

Contractor registration does not authorize regulated electrical work.
06A and 06B do not authorize external feeders, panelboards or general electrical work beyond their scope.
Gas piping, plumbing and sheet-metal permits may follow separate requirements.
Local mechanical permits and inspections remain mandatory.

Washington may separate the credential held by a worker from the contractor license held by the business, while preserving local authority over permits and inspections. Confirm every applicable layer before bidding, advertising or beginning regulated work.

Washington HVAC contractor license cost and renewal

Add training, examination, bond, equipment and local permitting costs.

Renew by the published deadline and retain all supporting records.

Government charges are only part of the expected cost. Training, examination preparation, fingerprints, surety premiums, insurance, equipment calibration and local permits can add to the total.

Washington HVAC contractor license checklist

Confirm that this credential matches the exact work you will perform.
Check whether the applicant is an individual, sole owner or separate business entity.
Collect experience and training records before submitting the application.
Use the current official form and fee schedule.
Complete every required examination or approved certification route.
File bonds, insurance and fingerprints when applicable.
Check county, city, water supplier and building-permit rules.
Save the expiration date and renewal requirements.

Frequently asked questions

Is this credential statewide?

Yes; local permits and inspections remain separate.

Is an exam required?

Washington 06A or 06B electrical examination for persons performing covered electrical work; EPA-approved Section 608 examination for refrigerant handling.

When does it renew?

Contractor registration every two years; specialty electrician certificate every three years.

Are local approvals separate?

Yes.

Official sources used

Verified licensing details

Jurisdiction: state credential plus local permits and inspections
Licensing authority: Washington Department of Labor & Industries
Fees: Contractor registration is $150.20 for two years. Electrical trainee, examination, certificate and electrical-contractor fees are additional.
Experience: 06A requires 4,000 hours in the specialty; 06B requires 2,000 hours under the published supervision rules. Mechanical-only contractor registration has no trade-exam experience threshold.
Exams: Washington 06A or 06B electrical examination for persons performing covered electrical work; EPA-approved Section 608 examination for refrigerant handling.
Insurance or bond: Specialty contractor registration requires a $15,000 bond and either $200,000 public liability plus $50,000 property damage or a $250,000 combined limit.
Continuing education: Electrical certificate renewal requires 24 hours of approved continuing education; Section 608 certification does not expire.
Renewal period: Contractor registration every two years; specialty electrician certificate every three years.

Official sources

Official sources last checked August 24, 2026.

Requirements can change and local rules may apply. Confirm the current requirements with the official authority before paying a fee or beginning work.