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

Unincorporated Ventura County allows ADUs and JADUs ministerially under NCZO Sec. 8107-1.7, updated by Ord. 4633 (effective July 3, 2024) to match state law (Gov. Code 66310+). A new detached ADU up to 850 sq ft with 4-foot setbacks is approved by building permit; larger ADUs to 1,800 sq ft use a ministerial Zoning Clearance.

Ventura County Accessory Dwelling Unit (ADU/JADU) Rules

Few Restrictions

Full ordinance details →Official source ↗

Shed Rules

In unincorporated Ventura County, detached accessory structures such as storage sheds not used for human habitation must sit at least 3 feet from interior and rear lot lines and occupy no more than 40 percent of the rear setback area (NCZO Sec. 8106-5.1). Conforming sheds are processed through a ministerial Zoning Clearance with site plans and elevations.

Ventura County Storage Shed & Accessory Structure Rules

Some Restrictions

Full ordinance details →Official source ↗

Garage Conversions

Unincorporated Ventura County allows converting a garage into an ADU or JADU ministerially under NCZO Sec. 8107-1.7. A conversion within an existing accessory structure needs no added setbacks (8107-1.7.4(a)), and demolished or converted garage parking need not be replaced for the main home (8107-1.7.5(c)). An attached garage can instead become a JADU up to 500 sq ft.

Ventura County Garage Conversion Rules

Few Restrictions

Full ordinance details →Official source ↗

Carport Rules

A carport in unincorporated Ventura County is treated as an accessory structure under NCZO Sec. 8106-5.1 (at least 3 feet from interior and rear lot lines for non-habitable detached structures). Setback parking follows Sec. 8106-5.3, and an existing carport can be demolished or converted for an ADU without replacing the parking (Sec. 8107-1.7.5(c)).

Ventura County Carport & Covered Parking Rules

Some Restrictions

Full ordinance details →Official source ↗

Tiny Homes

Unincorporated Ventura County has no standalone tiny-home ordinance. A foundation tiny house is reviewed as an ADU under NCZO Sec. 8107-1.7 (detached, up to 850 sq ft by building permit, 16-ft height, 4-ft setbacks). A tiny house on wheels is treated as an RV or manufactured home and cannot be a permanent dwelling outside an approved RV or mobilehome park.