Ventura, CA Accessory Structures: Garage Conversions (2026)
Garage conversion rules in Ventura, CA, sometimes called garage-to-ADU or accessory living unit conversions, govern permits, ceiling height, egress, and parking replacement.
Key Facts
- Governing section
- § 24.430.040(A)
- Single-family lot
- 1 ADU + 1 JADU, building permit only
- Multifamily lot
- Garages convertible, cap 25% of units
- Setbacks
- Fire/safety only, no numeric table
- Parking
- No replacement required outside AMPA
- Coastal zone
- Needs coastal permit under Ch. 24.515
Summary
Converting an existing garage into livable space in Ventura is allowed only as part of an accessory dwelling unit under Municipal Code Section 24.430.040(A). A garage conversion on a single-family lot qualifies for ministerial building-permit approval, and multifamily buildings may convert garages, storage rooms and similar spaces into ADUs up to 25 percent of existing units.
24.430.040 Approvals. ... A. Building Permit Only. If an ADU or JADU complies with each of the general requirements in Section 24.430.050, it is allowed with only a building permit in the following scenarios: 1. Converted on Single-Family Lot. One ADU as described in this subsection and one JADU on a lot with a proposed or existing single-family dwelling on it, where the ADU or JADU: a. Is either: within the space of a proposed single-family dwelling; within the existing space of an existing single-family dwelling; or (in the case of an ADU only) within the existing space of an accessory structure, plus up to 150 additional square feet if the expansion is limited to accommodating ingress and egress; ... 3. Converted on Multifamily Lot. One or more ADUs within portions of existing multifamily dwelling structures that are not used as livable space, including but not limited to storage rooms, boiler rooms, passageways, attics, basements, or garages, if each converted ADU complies with state building standards for dwellings.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 2026-008, passed May 12, 2026).
Full Breakdown
430. 040(A), with no discretionary hearing. 040(A)(3) allows one or more ADUs converted from portions of the building that are not livable space, expressly naming garages alongside storage rooms, boiler rooms, passageways, attics and basements, up to a quantity equal to 25 percent of the existing multifamily units, so long as each converted unit meets state building standards for dwellings. 040(A)(1)(c), rather than the numeric setback tables that apply to new construction. 050(N)(3), where displaced parking must be replaced on-site. 515 before the garage can be converted.
Violations & Fines
Converting a garage into living space without a building permit, or without qualifying under the specific scenarios in Section 24.430.040(A), is an unpermitted structure subject to Community Development code enforcement, including orders to obtain retroactive permits, correct the work, or restore the garage; unpermitted ADUs built before 2020 have a limited legalization pathway under Section 24.430.080(B).
Frequently Asked Questions
Can I convert my garage into an ADU without a public hearing?
Do I have to replace the parking space I lose?
Can an apartment building convert garages into ADUs?
What setbacks apply to a converted garage ADU?
Sources & Official References
Other rules in Ventura
California rules heatmap·Compare Ventura to another location·View the California accessory structures overview
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Garage Conversions in Nearby Cities
How other cities in Ventura County handle garage conversions.