Home › Washington › Seattle › Plumbers › Costco Wholesale Corporation

Costco Wholesale Corporation

Registered with Washington L&I Active
COSTCWC770K6 · Plumbing Contractor · renews June 2027

From the state register, October 17, 2026. Confirm on L&I, which also shows their bond and insurance.

(425) 313-8100Phone on their state registration Reviews on GoogleOpens Google Maps
Journey levelSpecialty on the register

Before you hire them

1Check the name on your estimate matches Costco Wholesale Corporation and registration COSTCWC770K6.
2Ask whether the job needs a permit, and who pulls it.
3Get a written estimate first. No big cash deposits.
Ask this pro to call me

Free. Goes to one pro registered with Washington L&I.

Referral service, not a contractor. Privacy.

"Get a pro to call me" goes to Costco Wholesale Corporation if they can take it; if not, to one other registered plumber near Seattle.

Other registered plumbers in Seattle

AAA Water HeatersAAAWAWH741J7Collier Plumber IncCOLLIPI792MOMarks Plumbing Service LLCMARKSPS763NBMacdonald-Miller Fac Solns LLCMACDOFS798P9Button Plumbing & Heating LLCBUTTOPH796ONHomeservice Plumbers LLCHOMESPL773KW

All plumbers in Seattle

Is this your business? Add your services and a pro-tip video, and get customer requests. Tell us what you'd like.