California Contractor Insurance

C-34 Pipeline Contractor License: What It Covers and the Insurance It Needs

Asena Capital Insurance Services — California-licensed insurance brokerage serving contractors statewide. Phone: (858) 925-9555. Email: info@asenainsurance.com.

What a C-34 license allows

CSLB defines the C-34 Pipeline Contractor classification as follows: “A pipeline contractor fabricates and installs pipelines for the conveyance of fluids, such as water, gas, or petroleum, or for the containment or protection of any other material, including the application of protective coatings or systems and the trenching, boring, shoring, backfilling, compacting, paving and surfacing necessary to complete the installation of such pipelines.” Source: cslb.ca.gov licensing classifications.

C-34 licenses in California by the numbers

As of September 2026, CSLB lists 491 current licenses that include C-34. 68% have workers' comp on file, 28% are filed exempt, and 16 were issued in the last 12 months.

Ownership: 27% sole owners, 65% corporations, 6% LLCs. Suspensions today: 6 for workers' comp, 10 for bonds.

California cities with the most active C-34 licenses — CSLB public license file, September 2026.
LicensesWith WC policyExemptNew (12 mo)
Bakersfield1776%18%0
Santa Barbara1644%44%0
Riverside1443%43%0
Sacramento888%0%0
Orange875%25%0
Simi Valley786%14%0
Yucaipa650%33%0
Tulare683%0%0
Petaluma683%17%0
Moreno Valley650%50%0

Insurance and bonds a C-34 contractor needs

  • $25,000 contractor license bond — required for every active license.
  • Workers' comp — A license with employees must carry workers' comp. With no employees you can currently file an exemption; from January 1, 2028 (SB 1455), CSLB will require workers' comp for all active licenses except joint ventures.
  • LLC licenses — liability insurance of at least $1 million (up to $5 million by member count) plus a $100,000 employee/worker bond.
  • General liability and commercial auto — not required by CSLB for most licenses, but required by nearly every GC, owner and public agency contract.

Carriers underwrite based on the work you actually perform under this classification, your residential/commercial mix, subcontracting and claims history.

Get a quote

Asena Capital Insurance Services compares multiple markets for pipeline contractors and requests additional insured endorsements for you when a contract calls for them. Call (858) 925-9555 or request a quote — only your name, phone and email are required. CA License #6008596.

Frequently asked questions

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