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Washington contractor license

Great Sun Corp

Great Sun Corp of Seattle holds Washington license GREATSC951D1 (CC-SM Heating/Vent/Air-Conditioning and Refrig (HVAC/R)). The L&I file dated Nov 1, 2026 lists it as active.1 It expires Apr 5, 2027.

Licensed 21 years, longer than 71% of 46 active Seattle HVAC contractors.

Active

Great Sun Corp, Seattle

License
GREATSC951D1
Class
CC-SM Heating/Vent/Air-Conditioning and Refrig (HVAC/R)
Expires
Apr 5, 2027
Bond
$15,000
Liability insurance
$1,000,000 to Jun 15, 2027

L&I file dated Nov 1, 2026

From the L&I file dated Nov 1, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the L&I file dated Nov 1, 2026. Confirm with the board: L&I contractor lookup

What bond, insurance and workers' comp are on file?

Bond
$15,000Western Surety Co, from Apr 5, 2025, continuous
Liability insurance
$1,000,000Ohio Cas Ins Co, from Jun 15, 2026, to Jun 15, 2027
Workers' comp
Not in the L&I fileCheck with the board

What work does this license cover?

License level: Construction Contractor. Issued Mar 21, 2005.

Which other Seattle businesses hold CC-SM Heating/Vent/Air-Conditioning and Refrig (HVAC/R)?

Washington HVAC contractors

What should you check before hiring?

What to ask before you hire

  1. Get the license number in writing. The name on the license should match the name on your contract and invoice.
  2. Check the class covers the job. A license for one trade doesn't cover another. Washington license classes
  3. Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
  4. Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. The L&I file doesn't record workers' comp, so ask for the certificate.
  5. Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

  1. Don't sign or pay a deposit until the L&I shows the license active again.
  2. Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the L&I, then check again.
  3. If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Department of Labor and Industries (L&I).
  4. Check another contractor. Washington license lookup

Sources

  1. L&I contractor license data (data.wa.gov, Nov 1, 2026)
  2. Department of Labor and Industries (L&I)