How many C51 structural steel contractors are licensed in California?

California has 1,642 contractors with a C51 (Structural Steel) license from the Contractors State License Board. 1,538 (94%) hold active licenses. SiteVetter's C51 license lookup checks each against SAM.gov, OSHA, DOL, and EPA databases.

What does a C51 license cover in California?

A California C51 license covers structural steel contractors for steel frame construction. Any contractor performing structural steel work valued at $500 or more must hold this license. The CSLB issues and regulates all contractor licenses in the state.

What percentage of structural steel contractors have federal violations?

11.0% of California structural steel contractors (181 out of 1,642) have at least one record in federal databases. These include SAM.gov debarments, DOL wage violations, OSHA safety citations, and EPA environmental violations.

C51 Structural Steel Contractors in California - Page 4 | CSLB License Lookup

C51 Structural Steel Contractor License Lookup

Use this page when you need a California C51 license lookup, a list of licensed structural steel contractors, or a quick screen before assigning structural steel work to a sub. Each row links to a contractor profile with CSLB status, workers' comp, bond, federal records, and permit checks.

California has 1,642 CSLB C51 license records for structural steel contractors. 94% currently hold active licenses and 11.0% 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 C51 Structural Steel 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 Structural Steel Work

For structural steel work, 11.0% 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.

C51 Structural Steel Contractors in California - Page 4

CSLB C51 License Scope

C51 Structural Steel Contractor License Records

C51 Structural Steel Contractor License Lookup

What to Check for C51 Structural Steel Contractors

Why Federal Records Matter for Structural Steel Work