Mg Structural Steel, C-51 Structural Steel Contractor in San Bruno, CA
Mg Structural Steel operating as a sole owner holds an active California contractor license (CSLB #1147333), valid through Dec 31, 2027. First issued in 2025, the license has been on the CSLB roster for 1 year. It carries a single CSLB classification: C-51 — Structural Steel Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and an exempt workers' compensation status (no employees on payroll). The business is based in San Bruno, in San Mateo County, California.
- License Number
- 1147333
- Issued
- Dec 8, 2025
- Status
- CLEAR
- Expires
- Dec 31, 2027
- Entity
- Sole Owner
- Surety
- American Contractors Indemnity Company
- Bond Number
- 101015076
- Effective
- Nov 24, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Nov 24, 2025
- Expires
- —
Recently licensed: the CSLB license is active and in good standing, issued within the last 2 years.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Mg Structural Steel licensed in California?
Yes. Mg Structural Steel holds California Contractors State License Board license number 1147333, which is active and in good standing. The license was first issued on December 8, 2025. It is valid through December 31, 2027.
What does Mg Structural Steel specialize in?
Mg Structural Steel is licensed for one CSLB classification: C-51 Structural Steel Contractor.
Where is Mg Structural Steel headquartered?
Mg Structural Steel is headquartered at 203 East Avenue, San Bruno, CA 94066, in San Mateo County, California.
Does Mg Structural Steel have an active surety bond on file with CSLB?
Yes. Mg Structural Steel has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Mg Structural Steel carry workers' compensation coverage?
Mg Structural Steel reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Mg Structural Steel's contractor license?
You can verify Mg Structural Steel's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1147333.
- Bond activeNov 24, 2025
- WC coverage startsNov 24, 2025
- License issuedDec 8, 2025
- License expiresDec 31, 2027
- Bear Flag Ironworks LLC#1119272Pescadero·C-51 Structural Steel Contractor
- I B Steel#1133163San Bruno·C-51 Structural Steel Contractor
- Rs Steel INC#1113151Daly City·C-51 Structural Steel Contractor
- Dolan Iron Works#1068535Pacifica·C-51 Structural Steel Contractor
- Ts Metal INC#1070518Millbrae·C-51 Structural Steel Contractor
- Alvarado Structural Steel#1075347Daly City·B General Building Contractor
- San Mateo Artistic Iron Works INC#279503San Mateo·C-23 Ornamental Metal Contractor
- Umili America INC#454679South San Francisco·C-23 Ornamental Metal Contractor
Working a California job with Mg Structural Steel, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Mg Structural Steel? Claim or correct this profile