ADU CITIES Contractor Directory

Underground Manholes

Also listed as: Underground Builders Inc

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

☎ Call (909) 633-2598Verify this license at CSLB
CSLB license#659134
ClassificationsA — General Engineering · C-42 — Sanitation System
Office of record7639 Mckinley Avenue
San Bernardino, CA 92410
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(909) 633-2598
Contractor bond$25,000 — North River Insurance Company (the)
Workers' comp (CSLB record)Workers' Compensation Insurance — State Compensation Insurance Fund
Business typeCorporation
License issuedNovember 23, 1992
License expiresFebruary 28, 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.