Public CSLB records

Master Building Specialties INC

License #616533·Corporation·Ontario, San Bernardino County
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Summary

Master Building Specialties INC operating as a corporation is licensed in California under CSLB number 616533. The license was first issued in 1991, putting the business at 35 years on the active CSLB roster. It carries a single CSLB classification: C-61/D-34 — Prefabricated Equipment Contractor. Records show an active surety bond on file with Merchants Bonding Company (mutual) and active workers' compensation coverage from Norguard Insurance Company. The business is based in Ontario, in San Bernardino County, California.

Business Information
Address
5448 Morgan St
Ontario, CA 91762
License Details & Classifications
License Number
616533
Issued
Mar 26, 1991
Status
CLEAR
Expires
Feb 28, 2027
Entity
Corporation
Financial & Insurance Coverage
Contractor Bond
Surety
Merchants Bonding Company (mutual)
Bond Number
101367703
Effective
Jan 12, 2025
Status
Active
Workers' Compensation
Coverage
Workers' Compensation Insurance
Carrier
Norguard Insurance Company
Policy Number
MAWC795098
Effective
Feb 11, 2026
Expires
Feb 11, 2027
Verified

This contractor is verified, with no adverse conditions in the current CSLB record.

License StatusActive
Contractor BondOn file
Workers' CompensationActive

An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this

Frequently asked questions
Is Master Building Specialties INC licensed in California?

Yes. Master Building Specialties INC holds California Contractors State License Board license number 616533. The license was first issued on March 26, 1991. It is valid through February 28, 2027.

What does Master Building Specialties INC specialize in?

Master Building Specialties INC is licensed for one CSLB classification: C-61/D-34 Prefabricated Equipment Contractor.

Where is Master Building Specialties INC headquartered?

Master Building Specialties INC is headquartered at 5448 Morgan St, Ontario, CA 91762, in San Bernardino County, California.

Does Master Building Specialties INC have an active surety bond on file with CSLB?

Yes. Master Building Specialties INC has an active California contractor surety bond filed with Merchants Bonding Company (mutual).

Does Master Building Specialties INC carry workers' compensation coverage?

Yes. Master Building Specialties INC carries active workers' compensation coverage through Norguard Insurance Company.

How do I verify Master Building Specialties INC's contractor license?

You can verify Master Building Specialties INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=616533.

Activity Timeline
  1. License issuedMar 26, 1991
  2. Bond activeJan 12, 2025
  3. WC coverage startsFeb 11, 2026
  4. WC expiresFeb 11, 2027
  5. License expiresFeb 28, 2027
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