Contractor License Proof

Chang Up Byun

Licensed

Verified against CSLB on · View on CSLB

License details

License number
1006421
Status
Active
Classifications
B · General Building
Contractor bond
$25,000
Workers' comp
ExemptNo employees — not a red flag.
License term on file
August 14, 2015 – August 31, 2027

Business

  • (714) 728 8115 (CSLB public record)
  • 1238 LENAHAN ST, Fullerton, CA 92833Orange County

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Frequently asked questions

Is Chang Up Byun licensed in California?

Yes. Chang Up Byun holds an active California state contractor license (CSLB #1006421), verified against the CSLB public record on August 4, 2026.

What is Chang Up Byun's CSLB license number?

Chang Up Byun's California contractor license number is 1006421. 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 Chang Up Byun licensed for?

Chang Up Byun is classified under General Building (B) by the CSLB.

How do I verify Chang Up Byun's license myself?

Look up license #1006421 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 August 4, 2026.

Verify it yourself: How to verify a California contractor license · Look up #1006421 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.