12 Stone Construction CO, B General Building Contractor in San Bruno, CA
12 Stone Construction CO operating as a sole owner holds California contractor license #1019489, which is currently expired (lapsed Oct 31, 2026) and not valid to contract until it is renewed. First issued in 2016, the license has been on the CSLB roster for 10 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Philadelphia Indemnity Insurance Company and an exempt workers' compensation status (no employees on payroll). The business is based in San Bruno, in San Mateo County, California.
- License Number
- 1019489
- Issued
- Oct 18, 2016
- Status
- CLEAR
- Expires
- Oct 31, 2026
- Entity
- Sole Owner
- Surety
- Philadelphia Indemnity Insurance Company
- Bond Number
- PB10163405587
- Effective
- Nov 17, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Oct 15, 2024
- Expires
- —
This contractor has a compliance issue in its public CSLB record:
- License expired
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is 12 Stone Construction CO licensed in California?
12 Stone Construction CO previously held California Contractors State License Board license number 1019489, but the license expired on October 31, 2026 and is not currently valid. It was first issued on October 18, 2016.
What does 12 Stone Construction CO specialize in?
12 Stone Construction CO is licensed for one CSLB classification: B General Building Contractor.
Where is 12 Stone Construction CO headquartered?
12 Stone Construction CO is headquartered at Po Box 1101, San Bruno, CA 94066, in San Mateo County, California.
Does 12 Stone Construction CO have an active surety bond on file with CSLB?
Yes. 12 Stone Construction CO has an active California contractor surety bond filed with Philadelphia Indemnity Insurance Company.
Does 12 Stone Construction CO carry workers' compensation coverage?
12 Stone Construction CO reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify 12 Stone Construction CO's contractor license?
You can verify 12 Stone Construction CO's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1019489.
- License issuedOct 18, 2016
- WC coverage startsOct 15, 2024
- Bond activeNov 17, 2025
- License expiredOct 31, 2026
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