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Alameda County, California

Licensed Trade Records in Alameda County, California

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Browse 7,639 verified licensed trade contractors registered across Alameda County, California (including Oakland, Fremont, Hayward, Berkeley). 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: Oakland

Municipalities in Alameda County (35)

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

Oakland 1338Hayward 884Livermore 558Fremont 556San Leandro 553Vallejo 437Fairfield 425Berkeley 357Castro Valley 344Pleasanton 300Alameda 256Dublin 179Newark 177Benicia 165Union City 146San Lorenzo 125Bay Point 106Clayton 90Discovery Bay 87Alamo 79Emeryville 71Pacheco 62Suisun City 59Rodeo 48Rio Vista 41Moraga 36Albany 33Kensington 32Piedmont 25Crockett 23Angwin 15Byron 10Suisun 8Knightsen 4Clyde 3

7639 licensed trade records · Alameda County, CA

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

All trades directory — Alameda County

7639 matching records across 35 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.

6ZIP 945443ZIP 945912ZIP 945452ZIP 946081ZIP 946031ZIP 945791ZIP 945781ZIP 945411ZIP 945681ZIP 945651ZIP 945601ZIP 946021ZIP 945511ZIP 945361ZIP 945341ZIP 94703Approximate postal/city centroid schematic (16 areas)

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Ama Tree

Official license file Contactable Tree service · Contractors State License Board · Specialty scope: Tree Service & Arboriculture (CSLB D-49)

Registered address: 110 BAYWOOD DR, Vallejo, CA 94591

1130016 · Source dated 2026-10-18 · Service area not confirmed. · Verify on California portal →

Call (510) 660-7110
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Frequently Asked Questions — Alameda County, CA

How are licensed trade credentials verified in Alameda County, California?

Records across Alameda 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 Alameda County directory?

Alameda County coverage includes Oakland, Fremont, Hayward, Berkeley, San Leandro, Livermore, Pleasanton, Alameda, Union City, Dublin, with County Seat in Oakland.

Are licensed contractors in Alameda 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 CountyRiverside CountySan Bernardino CountyContra Costa 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.