Contractor License Proof

Herzfeld Martin

Licensed

Verified against CSLB on · View on CSLB

License details

License number
833782
Status
Active
Classifications
C-10 · ElectricalC-46 · SolarC-7 · Low Voltage SystemsD-31 · Pole Installation and MaintenanceD-56 · Trenching
Contractor bond
$25,000
Workers' comp
ExemptNo employees — not a red flag.
License term on file
March 11, 2004 – March 31, 2028

Business

  • (510) 243 0190 (CSLB public record)
  • 6131 HILLSIDE DR, El Sobrante, CA 94803Contra Costa County

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Frequently asked questions

Is Herzfeld Martin licensed in California?

Yes. Herzfeld Martin holds an active California state contractor license (CSLB #833782), verified against the CSLB public record on June 17, 2026.

What is Herzfeld Martin's CSLB license number?

Herzfeld Martin's California contractor license number is 833782. 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 Herzfeld Martin licensed for?

Herzfeld Martin is classified under Electrical (C-10), Solar (C-46), Low Voltage Systems (C-7), Pole Installation and Maintenance (D-31), and Trenching (D-56) by the CSLB.

How do I verify Herzfeld Martin's license myself?

Look up license #833782 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 #833782 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.