ADU CITIES Contractor Directory

Mainline Construction

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

CSLB license#855137
ClassificationsB — General Building
Office of record27262 Regio
Mission Viejo, CA 92692
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(714) 920-2166
Contractor bond$25,000 — Nationwide Mutual Insurance Company
Workers' comp (CSLB record)Workers' Compensation Insurance — Benchmark Insurance Company
Business typeCorporation
License issuedFebruary 28, 2005
License expiresDecember 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.