Washington
HVAC in Washington
45 HVAC companies in its metro areas within about 25 to 35 miles of Seattle and Spokane – plus how Washington licenses HVAC work.
Metro areas
Washington cities we cover
Across the state line
Nearby metro areas with Washington HVAC companies
These city pages include companies based in Washington.
Washington rules
Do HVAC contractors need a license in Washington?
How Washington licenses HVAC work
HVAC contractors are licensed by the state.
Who licenses: Washington State Department of Labor & Industries (L&I), Contractor Registration
License types: General Contractor Registration, Specialty Contractor Registration.
Companies: Under RCW 18.27.020 every contractor must register with L&I before advertising, bidding or performing work, and L&I confirms specialty contractors can do HVAC work; We did not confirm a separate HVAC-only license, and plumbing and electrical work carry additional licensing.
Local rules: We could not read the WAC 296-200A-016 specialty list or any city rules (fetch limits), so whether HVAC is a named specialty and what local permits apply are unconfirmed.
Check a license: secure.lni.wa.gov
Use L&I's Verify a Contractor, Tradesperson, or Business tool to confirm the contractor is registered, bonded and insured before hiring.
Federal rule: in every state, technicians who handle refrigerant must hold EPA Section 608 certification, whatever the state or city requires.
We could not confirm every detail from Washington’s own sources, so treat this as a starting point and check with the agency.
Sources: lni.wa.gov, app.leg.wa.gov. Checked October 2026 from official sources. This is not legal advice.
Before you hire
Ask for the license number and check it on the official lookup where one exists. Ask for proof of insurance and a written, itemized estimate, and ask who pulls the permit if the job needs one – a new furnace, heat pump or air conditioner usually does.
Questions
Washington HVAC questions
Do HVAC contractors need a license in Washington?
Washington licenses HVAC contractors statewide through the Washington State Department of Labor & Industries (L&I), Contractor Registration. You can check a license at secure.lni.wa.gov.
Where in Washington do you list HVAC companies?
In Washington: Seattle (23), Spokane (22). Each city page lists companies based within about 25 miles – 35 in smaller metro areas – whose own website names that city or nearby towns.
Do technicians need EPA certification?
Yes, in every state: federal rules require technicians who handle refrigerant to hold EPA Section 608 certification. A state or city license is a separate requirement.
How do I get an HVAC company listed in Washington?
HVAC companies can add their business free. We check every listing against the business’s own website.
Request an HVAC company
Ask us to find an HVAC company in Washington
Tell us the job and your ZIP code. We pass it to listed companies that serve your area.
No heat in freezing weather, or no cooling in dangerous heat? Call a company from the list that says it takes emergency calls – a form is not fast enough. If you smell gas or a carbon monoxide alarm sounds, leave first and call 911 or your gas utility from outside.