4. Local Licensing Requirements


City Business Licensing Requirements

The County of Sonoma does not require a business license or tax certificate for businesses operating in the unincorporated areas of the county. However, each City in which a business will generate revenue requires a license and/or a business tax certificate. During this application process, entrepreneurs should inquire about any further required licenses, permits or endorsements

Contacts for each of the nine incorporated cities are below:

AuthorityPhone NumberWebsite
Cloverdale(707) 894-1701cloverdale.net
Cotati(707) 665-3637ci.cotati.ca.us
Healdsburg(707) 431-3300ci.healdsburg.ca.us
Petaluma(707) 778-4301cityofpetaluma.org
Rohnert Park(707) 588-2236ci.rohnert-park.ca.us
Santa Rosa(707) 543-3200srcity.org
Sebastopol(707) 823-6167ci.sebastopol.ca.us
Sonoma(707) 938-3681sonomacity.org
Windsor (707) 838-1021townofwindsor.com/425/Business-License

Sonoma County Fictitious Name Statement 

If your new venture will conduct business under a name that does not contain the surname of any and all owners, or is a corporation that will do business under a different name than is registered with the State, you will need to file a Fictitious Business Name Statement with the County of Sonoma Clerk-Recorder-Assessor’s Office. This application must be filed within 40 days of business start date.

The Clerk’s Office can be reached at:

Sonoma County Clerks' Office

585 Fiscal Drive, Room 103
Santa Rosa, CA 95403
(707) 565-3800