Contractor License Proof

Ralph Holden & Co

Licensed

Verified against CSLB on · View on CSLB

License details

License number
307640
Status
Active
Classifications
A · General EngineeringB · General BuildingC-10 · ElectricalC-16 · Fire ProtectionC-36 · PlumbingC-57 · Well Drilling
Contractor bond
$25,000
Workers' comp
ExemptNo employees — not a red flag.
License term on file
July 1, 1975 – August 31, 2026

Business

  • (707) 484 2558 (CSLB public record)
  • 6055 W DRY CREEK ROAD, Healdsburg, CA 95448Sonoma County

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Frequently asked questions

Is Ralph Holden & Co licensed in California?

Yes. Ralph Holden & Co holds an active California state contractor license (CSLB #307640), verified against the CSLB public record on August 4, 2026.

What is Ralph Holden & Co's CSLB license number?

Ralph Holden & Co's California contractor license number is 307640. 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 Ralph Holden & Co licensed for?

Ralph Holden & Co is classified under General Engineering (A), General Building (B), Electrical (C-10), Fire Protection (C-16), Plumbing (C-36), and Well Drilling (C-57) by the CSLB.

How do I verify Ralph Holden & Co's license myself?

Look up license #307640 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 #307640 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.