ADU CITIES Contractor Directory

Grindstone Engineering

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

☎ Call (619) 278-9228Verify this license at CSLB
CSLB license#1148046
ClassificationsA — General Engineering
Office of record13491 Highway 94
Jamul, CA 91935
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(619) 278-9228
Contractor bond$25,000 — American Contractors Indemnity Company
Workers' comp (CSLB record)Exempt
Business typeSole Owner
License issuedDecember 22, 2025
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.