HomeCrafto
Menu
Quick search

Popular Trades

PlumbersElectriciansHVAC & ClimateGeneral ContractorsRoofersAll 22 trade categories →

Locations & GPS

Use my locationNew York City, NYSeattle, WAAustin, TXStamford, CTAll open cities →

Homeowner Toolkit

Match project to tradePrepare project briefCompare records (0/3)Saved records on deviceHow our data works →
Sign in

Sonoma County, California

Licensed Trade Records in Sonoma County, California

Illustration for home services in Sonoma County
Illustration, not a business photoPrepare brief →

Browse 6,622 verified licensed trade contractors registered across Sonoma County, California (including Santa Rosa, Petaluma, Rohnert Park, Windsor). 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 (56)

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

Santa Rosa 1433San Rafael 624Napa 581Novato 576Petaluma 564Sebastopol 305Rohnert Park 274Sonoma 227Windsor 202Ukiah 161Mill Valley 156Fort Bragg 117San Anselmo 112American Canyon 86Fairfax 82Healdsburg 82Cotati 78Willits 76Lakeport 68Cloverdale 65Kelseyville 61Sausalito 60Penngrove 46Hidden Valley Lake 45Corte Madera 44Redwood Valley 39Forestville 37Greenbrae 37Guerneville 32Calistoga 31Tiburon 29St Helena 27Clearlake 25Larkspur 23Kentfield 16Lower Lake 15Middletown 15Occidental 15Glen Ellen 13Gualala 13Hopland 11Upper Lake 10Geyserville 9Graton 9Fulton 8Mendocino 7Yountville 7Annapolis 6Cazadero 5Clearlake Oaks 5Lucerne 5Potter Valley 5Belvedere Tiburon 4Covelo 4Kenwood 4Monte Rio 3

6622 licensed trade records · Sonoma County, CA

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

All trades directory — Sonoma County

6622 matching records across 56 open municipalities · 25 on this page · Contactable records first, then alphabetical.

Prepare briefCompare records (0/3)
Show registered-address map (24 records on this page)18 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 949012ZIP 954922ZIP 949522ZIP 954071ZIP 959541ZIP 945591ZIP 949601ZIP 949031ZIP 945581ZIP 954481ZIP 954041ZIP 954721ZIP 949411ZIP 949451ZIP 954821ZIP 949281ZIP 949511ZIP 94904Approximate postal/city centroid schematic (18 areas)

Open this map to load OpenStreetMap tiles. Your browser will connect to OpenStreetMap and the map library provider.

Open area in OpenStreetMap ↗ · Report a map issue

Frequently Asked Questions — Sonoma County, CA

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

Records across Sonoma 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 Sonoma County directory?

Sonoma County coverage includes Santa Rosa, Petaluma, Rohnert Park, Windsor, Healdsburg, Sonoma, Sebastopol, Cloverdale, Cotati, Occidental, with County Seat in Santa Rosa.

Are licensed contractors in Sonoma 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 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.