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Business Licensing & Operations in Sonoma County, CA (2026)

5 county-level rules, plus city-specific rules for 2 cities in Sonoma County, California.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Sonoma County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Adult Entertainment

Unincorporated Sonoma County confines adult entertainment establishments to the C3 general commercial district and requires a minimum 1,000-foot separation from other adult businesses and residential zoning, a distinct county rule that does not apply inside the nine incorporated cities.

Sonoma County Adult Entertainment Zoning

Significant Restrictions

Sonoma County Code § 26-88-010(f)

No adult entertainment establishment shall be established except in the C3 (general commercial) district and except subject to the following limitations: (1) A minimum of one thousand feet (1,000′) from any other adult entertainment business; (2) A minimum of one thousand feet (1,000′) from any residential zoning district.

Tattoo & Body Modification

Tattoo, piercing and permanent-cosmetics businesses in unincorporated Sonoma County need a county health department facility permit, and each practitioner needs an annual registration under the county's Safe Body Art Act ordinance.

Sonoma County Tattoo and Body Art Permits

Significant Restrictions

Sonoma County Code § 14-5-030

It shall be unlawful for any person to operate or cause to be operated a body art facility, as defined in Health and Safety Code Section 119301, whether permanent or temporary, which includes mobile facilities, in the county or in any incorporated city in the county, without first obtaining a valid health permit. The term of the permit shall be one (1) year from the date of issuance.

Tobacco Retail License

Sonoma County requires an annual Department of Health Services license for every tobacco retailer in the unincorporated area, capping density at one per 2,500 residents and barring new stores near schools or existing retailers.

Sonoma County Tobacco Retail License Rules

Significant Restrictions

Sonoma County Code § 32A-3(a)

(a)License Required. It shall be unlawful for any person to engage in tobacco retailing in the county without first obtaining and maintaining a valid license pursuant to this chapter for each location at which tobacco retailing is to occur. Tobacco retailing without a valid license is a violation of this chapter and is a public nuisance.

Secondhand Dealers

Sonoma County requires a Secondhand Dealer License through the Sheriff's Office, costing $366 to apply plus state fingerprint and DOJ fees, with a $301 renewal fee due every other year.

Sonoma County Secondhand Dealer License

Some Restrictions

Sonoma County Code § 2-131

Effective July 1, 2024, the fees for providing the identified services shall be as follows: ... Secondhand Dealer License: New $366.00 (Plus State fingerprint fee and DOJ fees) Renewal $301.00 (Every other year)

Auto Repair on Residential Property

Running a car, motorcycle, or RV repair, painting, upholstery, or storage business from home is banned countywide. Sonoma County lists automotive repair and vehicle services among activities prohibited as home occupations in unincorporated areas.

Sonoma County Bans Home Auto Repair

Heavy Restrictions

Sonoma County Code § 26-88-121(b)(3)

(b)Limitations on Use. The following business activities are prohibited as home occupations:(1)Adult entertainment activities/businesses;(2)Animal hospitals and clinics; pet care services such as grooming, doggie day cares or kennels of any size;(3)Automotive and other vehicle sales, repair, services, painting, storage, or upholstery, or the repair of engines, including automobiles, boats, moto...

Business Licensing & Operations by City in Sonoma County

2 cities in Sonoma County have their own business licensing & operations rules. Each link goes to that city's dedicated page with code citations.

All Sonoma County ordinances

See every category we cover for Sonoma County: parking, noise, fences, fires, animals, pools, and more.

Sonoma County Ordinance Hub →