Plumbing contractor · Seattle, WA

Costco Wholesale Corporation

Active Washington registration COSTCWC770K6 · per L&I records

LicensedBondedInsured

Is Costco Wholesale Corporation Licensed?

Washington L&I records list Costco Wholesale Corporation with registration number COSTCWC770K6 and status ACTIVE, valid until Jun 5, 2027. The business address on file is in Seattle, WA 98124.

License Details

License #: COSTCWC770K6
Status: ACTIVE
License type: Plumbing Contractor
Specialty: Journey Level
First effective: Jun 5, 2023
Expires: Jun 5, 2027
Business type: Corporation
UBI (state business ID): 601024674
City: Seattle, WA 98124

Bond and Insurance on File

Surety bond: $6,000 · Liberty Mutual Ins Co
Effective Oct 28, 2022 · Until Canceled
Liability insurance: $1,000,000 · SAFETY NATIONAL CASUALTY CORPO
Expires Sep 5, 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 217 days left before it expires on Jun 5, 2027. Check that date against your project timeline.

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

Checks for Plumbers

Plumbing has two layers: the business registers as a contractor, and individual plumbers hold certificates of competency. Ask who will do the work and check their certificate on L&I Verify.
Trainees may work only under appropriate supervision; ask who is supervising.
Most plumbing beyond simple repairs needs a permit from your local building department.
More detail: Plumbing Contractor Requirements in Washington.

How to Verify This Contractor

Use the Confirm on L&I Verify button and search registration COSTCWC770K6 or UBI 601024674. The status there is the official one.
Check that the name on your bid or contract matches Costco Wholesale Corporation exactly (a corporation).
On L&I Verify, look for bond claims, lawsuits and any newer registration.
Ask for a certificate of insurance sent directly by the insurer, and compare it with the SAFETY NATIONAL CASUALTY CORPO policy on file.
Check the individual certificate of the person doing the work, not only the business.

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

Record data as of Oct 30, 2026, from the Washington L&I contractor file.

Other Plumbers in Seattle

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

Aaa Fire Protection Inc · Backflow Specialty · expires Sep 29, 2027
Aaa Water Heaters · Residential · expires Apr 27, 2028
Action Plumbing · Journey Level · expires Mar 11, 2028
Anthony'S Plumbing Company · Journey Level · expires Sep 28, 2027
Aquatechs Water Heater · Journey Level · expires Dec 19, 2027
Aurora Plumbing · Residential · expires Aug 16, 2027
Beagle Services Inc. · Journey Level · expires Jul 19, 2028
Bee'S Plbg, Htg & Swr Co LLC · Journey Level · expires May 27, 2027

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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