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Contra Costa County, California

Licensed Trade Records in Contra Costa County, California

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Browse 5,105 verified licensed trade contractors registered across Contra Costa County, California (including Concord, Richmond, Antioch, Walnut Creek). Every record is compiled from California Contractors State License Board (CA CSLB) public credential files under California Business and Professions Code Division 3, Chapter 9 (Contractors License Law: Class A, Class B General Building, and Class C Specialty Classifications with $25,000 Bond Requirement).

Official State Authority: California Contractors State License Board (CA CSLB) Official Registry · County Seat: Martinez

Municipalities in Contra Costa County (19)

Select a city or town in Contra Costa County to view local permit guidance and registered licensed trade records:

Concord 968Walnut Creek 479Richmond 468Antioch 452Brentwood 358Martinez 324Pittsburg 287Oakley 254Danville 241Pleasant Hill 231San Ramon 210San Pablo 172Lafayette 166El Sobrante 142Pinole 119El Cerrito 90Orinda 76Hercules 59Point Richmond 9

5105 licensed trade records · Contra Costa County, CA

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Public Directory Quality: Official CA CSLB license records across Contra Costa County · Zero sponsored order · Never sold as a lead · How our data works →

All trades directory — Contra Costa County

5105 matching records across 19 open municipalities · 25 on this page · Contactable records first, then alphabetical.

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Show registered-address map (25 records on this page)16 approximate areas

Shaded areas mark approximate postal or city locations, not premises or service areas. Circle sizes are illustrative, not postal boundaries. Some records share the same area. Private addresses are excluded.

4ZIP 945132ZIP 945232ZIP 945652ZIP 945972ZIP 945612ZIP 948062ZIP 945641ZIP 945471ZIP 945201ZIP 945531ZIP 945191ZIP 945981ZIP 945211ZIP 945961ZIP 945091ZIP 94583Approximate postal/city centroid schematic (16 areas)

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Frequently Asked Questions — Contra Costa County, CA

How are licensed trade credentials verified in Contra Costa County, California?

Records across Contra Costa County are sourced directly from the California Contractors State License Board (CA CSLB). California Business and Professions Code Division 3, Chapter 9 (Contractors License Law: Class A, Class B General Building, and Class C Specialty Classifications with $25,000 Bond Requirement)

Which municipalities are covered in the Contra Costa County directory?

Contra Costa County coverage includes Concord, Richmond, Antioch, Walnut Creek, San Ramon, Pittsburg, Brentwood, Danville, Martinez, Pleasant Hill, with County Seat in Martinez.

Are licensed contractors in Contra Costa County, CA required to carry insurance and surety bonds?

Yes. Under California licensing authority regulations, licensed trade contractors typically must maintain active Commercial General Liability insurance, appropriate surety bonds, and state Workers' Compensation coverage before pulling municipal permits.

Other Counties in California

Los Angeles CountySan Diego CountyOrange CountySanta Clara CountySan Francisco CountySacramento CountyAlameda CountyRiverside CountySan Bernardino CountySan Mateo CountyVentura CountyFresno CountyKern CountySonoma CountyStanislaus CountyMonterey CountySanta Barbara CountyButte CountyShasta CountyHumboldt County

Before the first call

  • Describe the job and ask whether it is within their scope and service area.
  • Check the credential with its issuing authority and ask what applies where the work will happen.
  • Ask about insurance, availability, who will do the work, and a written scope.
  • Ask about callout fees, labor or fixed rates, materials, cancellation and any estimate charge.
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Verification Overview & Key Takeaways: How to Check Official Credentials

HomeCrafto displays source records with different scopes, including licenses, registrations, municipal permits and community records. A source entry is not proof of qualification for your job. Before signing a work order or paying a deposit, homeowners should confirm that the contractor’s credential number is active, verify that the license classification covers the specific trade scope required for the job, and request a current Certificate of Insurance (COI) directly from the issuing insurance carrier. Independent verification protects your property and ensures compliance with local building codes.

How do you verify a contractor license number and insurance on official portals (FAQ)?

You can verify active license standing and consumer protection rules directly through official government portals, including Washington L&I Contractor Verify, the California Contractors State License Board (CSLB), the Connecticut eLicense Portal, USA.gov State Consumer Protection Offices, and FTC Home Improvement Consumer Guidance. Always confirm municipal permit requirements with your local building department before work begins.