Siem Bill Construction
Verified against CSLB on · View on CSLB
License details
- License number
- 866184
- Status
- Active
- Classifications
- B · General Building
- Contractor bond
- $25,000
- Workers' comp
- Exempt
- License term on file
- October 21, 2005 – October 31, 2027
Business
- (510) 735 1832 (CSLB public record)
- 5062 CAMINO ALTA MIRA, Castro Valley, CA 94546Alameda County
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Frequently asked questions
Is Siem Bill Construction licensed in California?
Yes. Siem Bill Construction holds an active California state contractor license (CSLB #866184), verified against the CSLB public record on June 17, 2026.
What is Siem Bill Construction's CSLB license number?
Siem Bill Construction's California contractor license number is 866184. You can verify it directly on the CSLB website: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=866184
What kind of work is Siem Bill Construction licensed for?
Siem Bill Construction is classified under General Building (B) by the CSLB.
How do I verify Siem Bill Construction's license myself?
Look up license #866184 with the CSLB "Check a License" tool at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=866184. This page reflects the CSLB public record as of June 17, 2026.
See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.