How many C34 pipeline contractors are licensed in California?

California has 577 contractors with a C34 (Pipeline) license from the Contractors State License Board. 553 (96%) hold active licenses. SiteVetter's C34 license lookup checks each against SAM.gov, OSHA, DOL, and EPA databases.

What does a C34 license cover in California?

A California C34 license covers pipeline contractors for water, gas, and sewer lines. Any contractor performing pipeline work valued at $500 or more must hold this license. The CSLB issues and regulates all contractor licenses in the state.

What percentage of pipeline contractors have federal violations?

12.3% of California pipeline contractors (71 out of 577) have at least one record in federal databases. These include SAM.gov debarments, DOL wage violations, OSHA safety citations, and EPA environmental violations.

C34 Pipeline Contractors in California - Page 11 | CSLB License Lookup

C34 Pipeline Contractor License Lookup

Use this page when you need a California C34 license lookup, a list of licensed pipeline contractors, or a quick screen before assigning pipeline work to a sub. Each row links to a contractor profile with CSLB status, workers' comp, bond, federal records, and permit checks.

California has 577 CSLB C34 license records for pipeline contractors. 96% currently hold active licenses and 12.3% have at least one federal compliance record. SiteVetter checks CSLB status, SAM.gov debarment, DOL wage violations, OSHA safety citations, EPA environmental records, and building permits in seconds.

What to Check for C34 Pipeline Contractors

Verify the contractor license is active and in good standing
Request proof of insurance and bonding
Get at least 3 written quotes before selecting a contractor
Check federal databases: SAM.gov, OSHA, DOL, and EPA records
Confirm bond: California requires $25,000+ contractor bond (SB 607)

Why Federal Records Matter for Pipeline Work

For pipeline work, 12.3% of licensed contractors have federal records that a standard CSLB license check would not reveal. SiteVetter's 6-source lookup gives GCs a faster way to compare subs before bid award, onboarding, or renewal review.

C34 Pipeline Contractors in California - Page 11

CSLB C34 License Scope

C34 Pipeline Contractor License Records

C34 Pipeline Contractor License Lookup

What to Check for C34 Pipeline Contractors

Why Federal Records Matter for Pipeline Work