Washington L&I Data · Updated Oct 30, 2026Independent and Up to Date · Not a Government Site

HVAC contractor · Seattle, WA

Great Sun Corp

Active  Washington registration GREATSC951D1 · per L&I records

LicensedBondedInsured

Is Great Sun Corp Licensed?

Washington L&I records list Great Sun Corp with registration number GREATSC951D1 and status ACTIVE, valid until Apr 5, 2027. The business address on file is in Seattle, WA 98108.

License Details

License #
GREATSC951D1
Status
ACTIVE
License type
Construction Contractor
Specialty
Heating/Vent/Air-Conditioning and Refrig (HVAC/R)
First effective
Mar 21, 2005
Expires
Apr 5, 2027
Business type
Corporation
UBI (state business ID)
601984317
City
Seattle, WA 98108

Bond and Insurance on File

Surety bond
$15,000 · Western Surety Co
Effective Apr 5, 2025 · Until Canceled
Liability insurance
$1,000,000 · Ohio Cas Ins Co
Expires Jun 15, 2027

What Active Status Means

The registration is current: L&I has a bond and liability insurance on file and the term has not ended. ACTIVE is necessary but not sufficient, so also check the expiry date, the bond and the insurance below.

Can this business work under this registration? Can work while it stays active.

The registration has 150 days left before it expires on Apr 5, 2027. Check that date against your project timeline.

All status codes are explained in Washington Contractor License Statuses Explained.

How This Record Compares in Seattle

Great Sun Corp has held registration GREATSC951D1 for 21.6 years. The median for the 29 active HVAC contractors with a Seattle address is 5.2 years, and 12 of them have held their registration for 10 years or more, so this registration is among the longer-held ones. 5 of them registered in the last 12 months.

97% of these Seattle records have a surety bond on file and 100% have liability insurance on file. The median insurance amount on file is $1,000,000; this business lists $1,000,000, which is equal to that median. Insurance amounts are what the insurer reported to L&I; they are not a rating of the business.

Record Timeline

  • Mar 21, 2005: Current registration GREATSC951D1 took effect.
  • Apr 5, 2025: $15,000 surety bond with Western Surety Co took effect.
  • Oct 30, 2026: Our copy of the L&I record was taken.
  • Apr 5, 2027: Registration expires unless renewed.
  • Jun 15, 2027: Ohio Cas Ins Co liability policy on file expires.

Checks for HVAC Contractors

How to Verify This Contractor

  1. Use the Confirm on L&I Verify button and search registration GREATSC951D1 or UBI 601984317. The status there is the official one.
  2. Check that the name on your bid or contract matches Great Sun Corp exactly (a corporation).
  3. On L&I Verify, look for bond claims, lawsuits and any newer registration.
  4. Ask for a certificate of insurance sent directly by the insurer, and compare it with the Ohio Cas Ins Co policy on file.

A full walkthrough is in How to Check a Contractor License in Washington.

Record data as of , from the Washington L&I contractor file.

Other HVAC Contractors in Seattle

Active hvac contractor registrations with a Seattle address in the same L&I file. Listing here is not an endorsement.

Accuracy notice. Data from Washington L&I open data (public domain, PDDL), not affiliated with any government. Records change; confirm on the official L&I Verify tool before hiring. Search other businesses with the Washington contractor license lookup.

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