ADU CITIES Contractor Directory

Copperstate Plumbing

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

CSLB license#1100284
ClassificationsC-36 — Plumbing
Office of record8040 Puritan St
Downey, CA 90242
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(562) 556-5353
Contractor bond$25,000 — Business Alliance Insurance Company
Workers' comp (CSLB record)Workers' Compensation Insurance — Technology Insurance Company Inc
Business typeCorporation
License issuedJanuary 5, 2023
License expiresJanuary 31, 2027

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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.