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Sonoma County, California

General contracting in Sonoma County, California

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Browse 3,123 verified general contracting registered across Sonoma County, California (including Santa Rosa, Petaluma, Rohnert Park, Windsor, Healdsburg, Sonoma). 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: Santa Rosa

Municipalities in Sonoma County (34)

Select a city or town in Sonoma County to view local permit guidance and registered general contracting records:

Santa Rosa 643San Rafael 318Novato 297Petaluma 291Napa 286Sebastopol 165Mill Valley 116Sonoma 109Rohnert Park 93San Anselmo 80Windsor 80Ukiah 70Fort Bragg 60Healdsburg 48Fairfax 45Cotati 37Kelseyville 37Lakeport 36American Canyon 33Willits 32Sausalito 31Cloverdale 30Corte Madera 25Redwood Valley 23Tiburon 23Guerneville 20St Helena 19Calistoga 17Clearlake 16Larkspur 15Middletown 8Occidental 8Gualala 7Yountville 3

3123 general contracting records · Sonoma County, CA

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

General contracting directory — Sonoma County

3123 matching records across 34 open municipalities · 25 on this page · Contactable records first, then alphabetical.

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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.

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Other Counties in California

Los Angeles CountySan Diego CountyOrange CountySanta Clara CountySan Francisco CountySacramento CountyAlameda CountyRiverside CountySan Bernardino CountyContra Costa CountySan Mateo CountyVentura CountyFresno CountyKern 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.
Prepare a project brief

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.