ADU CITIES Contractor Directory

Sum Systems Inc

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

CSLB license#1117097
ClassificationsC-10 — Electrical
Office of record3530 W Slauson Ave
Los Angeles, CA 90043
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(323) 472-7490
Contractor bond$25,000 — Philadelphia Indemnity Insurance Company
Workers' comp (CSLB record)Workers' Compensation Insurance — Great American Alliance Insurance Company
Business typeCorporation
License issuedFebruary 26, 2024
License expiresFebruary 29, 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.