Washington contractor license
Cascadian Plumbing PLLC
Principal: Maxwell Oliver Smith
Suspended Expires October 28, 2027
- License number
- CASCAPP751P8
- License type
- Plumbing Contractor, Residential
- Location
- Auburn, WA
- Issued by
- Washington State Department of Labor & Industries
What this license means
Washington requires every construction contractor to register with L&I, post a bond and carry liability insurance. A general contractor can run a whole job and hire subs; a specialty contractor is registered for one kind of work. Registration is not a skills test, so check references too. Electrical and plumbing contractors hold separate L&I licenses.
Before you hire Cascadian Plumbing PLLC
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Confirm the record on the official site
Our copy is from the state's file dated November 10, 2026. The official record is live and also lists complaints and discipline, which our data doesn't include.
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Make sure the name on the contract matches
The contract, the permit and the license should all name Cascadian Plumbing PLLC. A different company name on the paperwork usually means someone else is working under this license.
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Check the license covers your job
This is a plumbing contractor, residential license. If your job is a different trade, the contractor needs that license too, or a licensed sub for that part.
Is this your license, or is something wrong?
This status comes from Washington Department of Labor & Industries contractor data (construction, electrical, plumbing and elevator contractors), updated daily, file dated November 10, 2026, and it may have changed since. The official record is the one that counts. If it's wrong, the state has to fix it. If our page is the problem, or you want this record off our site, email us or see our corrections page.
Hiring in Washington
See the Washington contractor licensing guide for which work needs a license, small-job limits, and how to file a complaint, or the step-by-step check. Or look up another contractor.