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Whatcom County, Washington

Licensed Trade Records in Whatcom County, Washington

Browse 1,821 verified licensed trade contractors registered across Whatcom County, Washington (including Bellingham, Lynden, Ferndale, Blaine, Everson, Nooksack). Every record is compiled from Washington State Department of Labor & Industries (WA L&I) public credential files under Revised Code of Washington RCW 18.27 (Contractor Registration), RCW 19.28 (Electrical EL01–EL06), and RCW 18.106 (Plumbing PL01/PL02).

Official State Authority: Washington State Department of Labor & Industries (WA L&I) Official Registry · County Seat: Bellingham

Municipalities in Whatcom County (10)

Select a city or town in Whatcom County to view local permit guidance and registered all trades records:

Bellingham 884Ferndale 288Lynden 261Blaine 141Everson 103Point Roberts 39Custer 34Deming 32Sumas 30Nooksack 9

1821 all trades records · Whatcom County, WA

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Public Directory Quality: Official WA L&I license records across Whatcom County · Zero sponsored order · Never sold as a lead · How our data works →

All trades directory — Whatcom County

1821 matching records across 10 open municipalities · 25 on this page · Contactable records first, then alphabetical.

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Koala-T Pool & Spa Servs LLC

Official license file Contactable Electrical · Washington State Department of Labor & Industries · Specialty scope: Pool & Spa Systems · Additional recorded trades: Pool service

Registered address: 6512 Northwest Dr, Ferndale, WA 98248

KOALAPS784CQ · Source dated 2026-10-18 · Service area not confirmed. · Verify on Washington portal →

+1 more registration for this business
Call (360) 384-6887
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Before the first call

  • Describe the job and ask whether it is within their scope and service area.
  • Check the credential with its issuing authority and ask what applies where the work will happen.
  • Ask about insurance, availability, who will do the work, and a written scope.
  • Ask about callout fees, labor or fixed rates, materials, cancellation and any estimate charge.
Prepare a project brief

Verification Overview & Key Takeaways: How to Check Official Credentials

HomeCrafto displays source records with different scopes, including licenses, registrations, municipal permits and community records. A source entry is not proof of qualification for your job. Before signing a work order or paying a deposit, homeowners should confirm that the contractor’s credential number is active, verify that the license classification covers the specific trade scope required for the job, and request a current Certificate of Insurance (COI) directly from the issuing insurance carrier. Independent verification protects your property and ensures compliance with local building codes.

How do you verify a contractor license number and insurance on official portals (FAQ)?

You can verify active license standing and consumer protection rules directly through official government portals, including Washington L&I Contractor Verify, the California Contractors State License Board (CSLB), the Connecticut eLicense Portal, USA.gov State Consumer Protection Offices, and FTC Home Improvement Consumer Guidance. Always confirm municipal permit requirements with your local building department before work begins.