Contractor License Proof

Master Building Specialties Inc

Licensed

Verified against CSLB on · View on CSLB

License details

License number
616533
Status
Active
Classifications
D-34 · Prefabricated Equipment
Contractor bond
$25,000
Workers' comp
Covered
License term on file
March 26, 1991 – February 28, 2027

Business

  • (909) 393 0186 (CSLB public record)
  • 5448 MORGAN ST, Ontario, CA 91762San Bernardino County

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Frequently asked questions

Is Master Building Specialties Inc licensed in California?

Yes. Master Building Specialties Inc holds an active California state contractor license (CSLB #616533), verified against the CSLB public record on June 17, 2026.

What is Master Building Specialties Inc's CSLB license number?

Master Building Specialties Inc's California contractor license number is 616533. Look that number up with the CSLB "Check a License" tool to confirm its current status against the public record yourself.

What kind of work is Master Building Specialties Inc licensed for?

Master Building Specialties Inc is classified under Prefabricated Equipment (D-34) by the CSLB.

How do I verify Master Building Specialties Inc's license myself?

Look up license #616533 with the CSLB "Check a License" tool and compare the status, bond, and workers' compensation details against what's shown on this page. This page reflects the CSLB public record as of June 17, 2026.

Verify it yourself: How to verify a California contractor license · Look up #616533 on CSLB

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See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.