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Licensed Structural Steel Contractors in San Francisco, California

Updated November 1, 2026 from CSLB's public license file · C-51 Structural Steel Contractor

  • 32licensed structural steel contractors
  • 30active (Clear)
  • 6.3%with a suspension
  • 31.3%workers' comp exempt
  • 19.2 yrsmedian time licensed
  • 84.4%corp / LLC / partnership (15.6% sole owner)
  • 3new in the last 12 months
  • —change tracking began November 1, 2026

CSLB's public data lists 32 structural steel contractors with a mailing address in San Francisco, and 30 of them (93.8%) show a Clear primary status.

31.3% report a workers' comp exemption, 3 points higher than the statewide figure for structural steel contractors (28.3%), so many of these businesses say they have no employees. The share with a suspension (6.3%) is close to the San Francisco County rate for the same license (6.3%).

3 of these licenses are less than a year old, while 71.9% have been held for 10 years or more. The median is 19.2 years.

In California this work generally calls for the C-51 Structural Steel Contractor license (or a B license when it is part of a larger multi-trade job). See the C-51 Structural Steel Contractor guide for what the license covers.

How to check a structural steel contractor's license in San Francisco

  1. Look the company up by name or license number (search San Francisco). On the profile, confirm three things: Clear status, the C-51 license for this kind of work, and a contractor's bond on file.
  2. Before any money changes hands, verify the license on CSLB's own lookup. Our data comes from CSLB's weekly file, so a very recent change may not show here yet.
  3. Match the license holder's name to the name on the written contract and the person you meet. Ask for proof of workers' comp if anyone besides the owner will work on site. Hiring checklist.

All 32 structural steel contractors in San Francisco

San Francisco structural steel contractors sorted with Clear licenses first, then by years licensed. Badges reflect CSLB's file dated November 1, 2026, not a rating of anyone's work.

Licensed structural steel contractors in San Francisco
Business nameLicense #StatusYearsWorkers' compBond
Chiang Robert 365642 Clear 48 Exempt On file
C S I Customer Service General Contracting INC 502942 Clear 39 Insured On file
C M Construction Company 520064 Clear 39 Insured On file
J C Metal Specialists INC 546302 Clear 38 Insured On file
Tom's Welding & Fabrication 728525 Clear 30 Insured On file
Barry Kevin J Ironworks 742590 Clear 29 Insured On file
Anco Iron & Construction INC 749293 Clear 28 Insured On file
Detail Ironworks 769491 Clear 27 Insured On file
T C Steel 791249 Clear 25 Insured On file
M C Metal INC 792411 Clear 25 Insured On file
J C Steel Fabrication INC 799544 Clear 25 Exempt On file
Apex Electric & Air 825156 Clear 23 Insured On file
B E I Steel INC 844874 Clear 22 Insured On file
West Cork Welding INC 851607 Clear 21 Insured On file
Wizard of Metals INC 850157 Clear 21 Insured On file
Fastnet Engineering & Construction INC 902121 Clear 19 Insured On file
T L K Steel Incorporated 904248 Clear 19 Insured On file
Bannon Construction INC 917823 Clear 18 Insured On file
Solher Iron INC 941762 Clear 16 Insured On file
M C O Engineering 986437 Clear 13 Exempt On file
Okane Cregg Steel INC 993716 Clear 12 Insured On file
Gold Mountain Investments INC 1015922 Clear 10 Exempt On file
Yiz Ironworker 1061277 Clear 6 Insured On file
Ferdel Structural Steel 1065478 Clear 6 Insured On file
Roscal Steel 1072824 Clear 5 Exempt On file
Rs Erectors 1090562 Clear 4 Exempt On file
Brother Steel INC 1138558 Clear 1 Insured On file
Gleaves Contractors INC 1145854 Clear 1 Insured On file
Velasquez Structural Steel INC 1153468 Clear <1 Exempt On file
Progress Metal Fabrication INC 1156260 Clear <1 Exempt On file
J C's Engineering 980143 Susp: contractor's bond 13 Exempt On file
Sullivan Structural Steel 1101652 Susp: contractor's bond 3 Exempt On file

Source: CSLB public data · Updated November 1, 2026 Status can change at any time. Verify on CSLB's Instant License Check.

Frequently asked questions

How many licensed structural steel contractors are in San Francisco?

CSLB's current public file lists 32 structural steel contractors with a San Francisco mailing address. 30 have a Clear status, and 81.3% show no issues at all in the file (no suspension, no pending action, bond on file, not near expiration).

What license does a structural steel contractor need in California?

Look for C-51 on the license. 32 businesses in San Francisco hold it. Small jobs under $1,000 with no permit and no employees are exempt; everything else needs a license (details).

How do I check a structural steel contractor's workers' comp?

Each profile shows the workers' comp type, insurer and policy dates from CSLB's file. Among San Francisco structural steel contractors, 31.3% are exempt (no employees), 68.8% insured and 0% without current coverage. Verify a policy with CSLB's insurer search (step by step).

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