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Nearby Plumber — nearbyplumber.com · License-verified plumbing directory · printed Oct 21, 2026
Plumbers › California › Calaveras County › Duane Mast
Licensed C-36 Plumbing · San Andreas, CA

Duane Mast

✓ CSLB Verified San Andreas, CA · Calaveras County

Duane Mast, based in San Andreas, CA, holds CSLB license 1117211 (C-36 Plumbing), which read active when we checked it on Oct 20, 2026.

License
C-36 Plumbing
License status
● Active
Last checked
Oct 20, 2026

CSLB license verification for Duane Mast

LicenseLicense numberStatus
C-36 Plumbing 1117211 ● Active
Last checked against CSLB records: Oct 20, 2026· Look up license 1117211 on the CSLB license check ↗

License data from the Contractors State License Board (cslb.ca.gov), published on its Public Data Portal, copied on the date shown. Neither this site nor the information as presented here is endorsed by the State of California or any state agency.

What the CSLB badge means

  • Their license number appears in the CSLB 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 Duane Mast is based

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

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