California contractor license
CIARAN CROSSAN
- C57 Well Drilling
CIARAN CROSSAN is a C57 Well Drilling contractor in South San Francisco, San Mateo County, licensed in California for 1 year (since 2025). As of Jul 20, 2026, the license is active with an expiration date of Jul 31, 2028 on record and a license bond is on file.
CIARAN CROSSANC57 Well Drilling · checked Jul 20, 2026
ActiveLicense number#1136311
Licensed sinceApr 21, 2025
Years licensed1 year
Expiration on recordJul 31, 2028
City and countySouth San Francisco, San Mateo County
License bondOn file
ProjectsNone on file
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Source: California Contractors State License Board (CSLB) and City of Los Angeles permit records. Last updated Jul 20, 2026.