ADU CITIES Contractor Directory

Lifeng Si

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

CSLB license#1143803
ClassificationsB — General Building
Office of record21035 Gacel Ct
Walnut, CA 91789
Address as listed in the CSLB record — the office of record, not a service-area claim.
Phone (CSLB record)(626) 989-0855
Contractor bond$25,000 — Western Surety Company
Workers' comp (CSLB record)Exempt
Business typeSole Owner
License issuedSeptember 19, 2025
License expiresSeptember 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.