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C51

C51 Structural Steel Contractors in California - Page 21

1,683 CSLB C51 license records for California (Page 21 of 34)

CSLB C51 License Scope

Structural steel contractors for steel frame construction.

1,683

Total Contractors

1,559

Active Licenses

185

Federal Records

Run CSLB License Lookup

C51 Structural Steel Contractor License Records

Showing contractors 1001-1050 of 1,683

M & K BUILDERS INC

Clear

License #848806 · STOCKTON

Active

M A S METALS

Clear

License #912805 · UNION CITY

Active

M B WELDING

Clear

License #959367 · LOS ANGELES

Active

M BAR C CONSTRUCTION INC

Clear

License #869960 · SAN MARCOS

Active

M C & SONS STEEL FABRICATORS

Clear

License #807571 · MENTONE

Active

M C METAL INC

Clear

License #792411 · SAN FRANCISCO

Active

M C O ENGINEERING

Clear

License #986437 · SAN FRANCISCO

Active

M D CONSTRUCTION

Clear

License #760113 · REDWOOD VALLEY

Family Sup Susp

M D STEEL INC

Clear

License #899299 · COVINA

Active

M G BUILDERS

Clear

License #479643 · TAHOE CITY

Active

M J WELDING INC

Clear

License #959485 · SUISUN CITY

Active

M L B BUILDERS

Clear

License #1139138 · WOODLAND HILLS

Work Comp Susp

M M MECHANICAL

Clear

License #553870 · COSTA MESA

Active

M R C WELDING INC

Clear

License #806132 · NORTH HOLLYWOOD

Active

M S H IRON WORKS

Clear

License #1003552 · DIXON

Active

M S STRUCTURAL STEEL

Clear

License #1099739 · MISSION VIEJO

Active

MA CHUANG

Clear

License #1085261 · WEST COVINA

Active

MAC STRUCTURAL STEEL INC

Clear

License #1052041 · LONG BEACH

BOND Pay Susp

MAD ERECTORS

Clear

License #1125179 · MADERA

Active

MADISON INDUSTRIES

Clear

License #119949 · SANTA ANA

Active

MADRIGAL DOMINGO

Clear

License #1088184 · FONTANA

Active

MAFFUCCI GENE WELDING

Clear

License #889350 · MARSHALL

Active

MAGIC IRON WORK

Clear

License #1028944 · PACOIMA

Active

MAKORABCO

Clear

License #1075301 · CARLSBAD

Susp - No Qualifier

MALDONADO INDUSTRIES

Clear

License #964663 · ONTARIO

Active

MAMMOTH WELDING INC

Clear

License #860670 · MAMMOTH LAKES

Active

MAN METAL DESIGN INC

Clear

License #769340 · BREA

Active

MANTIS CONSTRUCTION CORPORATION

Clear

License #1122860 · LOS ANGELES

Active

MANUFAB

Clear

License #1131320 · MORGAN HILL

Work Comp Susp

MARICOPA MISCELLANEOUS STEELS

Clear

License #1090787 · LAKE ISABELLA

Active

MARION SHIYI CHEN

Clear

License #1154504 · MILLBRAE

Active

MARLEON INC

Clear

License #274564 · HAWTHORNE

QUAL Bond SUSP

MARR IRONWORKS INC

Clear

License #883751 · BAKERSFIELD

Active

MARTIN IRON WORKS INC

Clear

License #185138 · RENO

Active

MARTINEZ METALS

Clear

License #871153 · COMMERCE

Active

MARTINEZ STEEL

Clear

License #1032705 · RIVERSIDE

Active

MAS IRON CO

Clear

License #817042 · LOS ANGELES

Active

MASSIMO RODORIGO

Clear

License #846747 · HESPERIA

Active

MASTER CRAFT IRON CO INC

Clear

License #785559 · NORTH HOLLYWOOD

Active

MATATYA CONSTRUCTION INC

Clear

License #1046598 · PACOIMA

Active

MATHER STEEL LLC

Clear

License #1074571 · MODESTO

Liab Ins Susp

MATHES BILL WELDING INC

Clear

License #741600 · SAN CLEMENTE

Active

MATNSON STRUCTURAL STEEL

Clear

License #1111560 · SIMI VALLEY

Active

MAX STRUCTURAL STEEL

Clear

License #1124822 · PORT MURRAY

Active

MAXIMUM METAL WORKS

Clear

License #990421 · VICTORVILLE

Active

MAXIMUM SERVICES COMPANY

Clear

License #738081 · LOS OSOS

Active

MAXX STEEL

Clear

License #1022023 · HIGHLAND

Work Comp Susp

MC CARTHY STEEL FABRICATION INC

Clear

License #894934 · LANCASTER

Active

MC DANIEL INC

Clear

License #653111 · MONTCLAIR

Active

MC INTYRE COMPANY A CALIF PARTNERSHIP THE

Clear

License #590332 · ONTARIO

Active

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 1,683 CSLB C51 license records for structural steel contractors. 93% 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.

Data sourced from California Contractors State License Board and federal databases. Updated weekly. For official verification, check directly with CSLB.