ADU CITIES Contractor Directory

Williamson Plumbing And Mechanical

● Active — license status verified against CSLB public data as of November 6, 2026

☎ Call (858) 449-1100Verify this license at CSLB
CSLB license#974182
ClassificationsC-36 — Plumbing
Office of record9885 Mesa Rim Rd Ste 105
San Diego, CA 92121
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(858) 449-1100
Contractor bond$25,000 — Philadelphia Indemnity Insurance Company
Workers' comp (CSLB record)Workers' Compensation Insurance — Security National Insurance Company
Business typeSole Owner
License issuedJune 22, 2012
License expiresJune 30, 2028

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Data source: CSLB public records as of November 6, 2026. License status can change at any time — verify live at CSLB before signing a contract.