ADU CITIES Contractor Directory

Astro Building Services

Also listed as: Sustainability Technologies Inc

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

☎ Call (619) 442-9686Verify this license at CSLB
CSLB license#988640
ClassificationsA — General Engineering · B — General Building · C-10 — Electrical · C-36 — Plumbing · C-4 — Boiler, Hot-Water Heating and Steam Fitting · C-7 — Low Voltage Systems
Office of record603 S Marshall Ave
El Cajon, CA 92020
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(619) 442-9686
Contractor bond$25,000 — American Contractors Indemnity Company
Workers' comp (CSLB record)Exempt
Business typeCorporation
License issuedNovember 22, 2013
License expiresNovember 30, 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.