Accessory Structures in Ventura County, CA (2026)

5 county-level rules, plus city-specific rules for 10 cities in Ventura County, California.

Verified from official government sources

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

ADU Rules

Ventura County permits accessory dwelling units under §8107-1.7, aligned with California Government Code 65852.2. ADUs are processed ministerially by building permit. Detached ADUs up to 1,200 sq ft are allowed with 4-foot side and rear setbacks. Junior ADUs (JADUs) up to 500 sq ft are regulated under §8107-1.7.6.

Ventura County ADU Regulations

Some Restrictions

Full ordinance details →Official source ↗

Shed Rules

Sheds and small accessory structures in unincorporated Ventura County are regulated by the county's zoning ordinance and building code. Sheds under 120 sq ft generally do not require a building permit but must comply with setback requirements.

Ventura County Shed Rules Ordinance

Few Restrictions

Full ordinance details →Official source ↗

Garage Conversions

Garage conversions in unincorporated Ventura County are governed by California's ADU laws and the county's building code. Converting a garage to a Junior ADU (up to 500 sq ft) is permitted under state law without requiring replacement parking.

Ventura County Garage Conversions Ordinance

Some Restrictions

Full ordinance details →Official source ↗

Carport Rules

Carports in unincorporated Ventura County are classified as accessory structures under the zoning ordinance. They must comply with setback requirements and may need building permits. Open carport designs may qualify for modified setback allowances under §8106-5.1.

Ventura County Carport Regulations

Some Restrictions

Full ordinance details →Official source ↗

Tiny Homes

Tiny homes on permanent foundations in unincorporated Ventura County are treated as ADUs under §8107-1.7 and CA Gov Code 65852.2. Tiny homes on wheels are classified as recreational vehicles and cannot serve as permanent residences.