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Nearby Plumber — nearbyplumber.com · License-verified plumbing directory · printed Oct 22, 2026
Plumbers › Washington › San Juan County › Duncan Plumbing Company LLC
Licensed Plumbing Contractor — Journey Level · Friday Harbor, WA

Duncan Plumbing Company LLC

✓ L&I Verified Friday Harbor, WA · San Juan County

Duncan Plumbing Company LLC, based in Friday Harbor, WA, holds L&I license DUNCAPC745ON (Plumbing Contractor — Journey Level), which read active when we checked it on Oct 21, 2026.

License
Plumbing Contractor — Journey Level
License status
● Active
Last checked
Oct 21, 2026

L&I license verification for Duncan Plumbing Company LLC

LicenseLicense numberStatus
Plumbing Contractor — Journey Level DUNCAPC745ON ● Active
Last checked against L&I records: Oct 21, 2026· Look up license DUNCAPC745ON on the L&I contractor verification ↗

What the L&I badge means

  • Their license number appears in the L&I record and reads active on the date shown.
  • The name and county we list match that record.
  • We re-check on a schedule and date-stamp every check.

What the badge does not mean

  • It is not a recommendation, an endorsement or a quality rating.
  • It does not confirm insurance, bonding or pricing.
  • It does not mean they are taking work right now.

Where Duncan Plumbing Company LLC is based

County of record on the L&I listing. That is where the business is filed, not where it works. The license is valid statewide.

Duncan Plumbing Company LLC reviews

No customer reviews of Duncan Plumbing Company LLC yet. We only publish reviews from confirmed customers after completed work, and we never import or synthesize them.

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