Contractor License Proof

Mackenbach John F

Licensed

Verified against CSLB on · View on CSLB

License details

License number
540055
Status
Active
Classifications
B · General Building
Contractor bond
$25,000
Workers' comp
ExemptNo employees — not a red flag.
License term on file
August 30, 1988 – August 31, 2026

Business

  • (310) 971 6429 (CSLB public record)
  • 56 PORTUGUESE BEND RD, Rolling Hills, CA 90274Los Angeles County

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Frequently asked questions

Is Mackenbach John F licensed in California?

Yes. Mackenbach John F holds an active California state contractor license (CSLB #540055), verified against the CSLB public record on June 17, 2026.

What is Mackenbach John F's CSLB license number?

Mackenbach John F's California contractor license number is 540055. 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 Mackenbach John F licensed for?

Mackenbach John F is classified under General Building (B) by the CSLB.

How do I verify Mackenbach John F's license myself?

Look up license #540055 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 #540055 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.