Kornerstone Construction
● Active — license status verified against CSLB public data as of November 6, 2026
| CSLB license | #1162745 |
|---|---|
| Classifications | B — General Building |
| Office of record | 1694 East Yale Street Ontario, CA 91764 Address as listed in the CSLB record — the office of record, not a service-area claim. |
| Phone (CSLB record) | (909) 774-6660 |
| Contractor bond | $25,000 — American Contractors Indemnity Company |
| Workers' comp (CSLB record) | Exempt |
| Business type | Corporation |
| License issued | October 9, 2026 |
| License expires | October 31, 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.