Which parts of Ventura County sit in the coastal zone, and what does that add to the review timeline?
The County’s Local Coastal Program governs building on unincorporated coastal land in Ventura County. The Planning Division describes it as three pieces that all answer to the Coastal Act: the Coastal Area Plan, the Coastal Zoning Ordinance, and two Categorical Exclusion Orders. The County splits that shoreline into North Coast, Central Coast, and South Coast subareas, the last reaching into the Santa Monica Mountains. Inside Ventura, Oxnard, or Port Hueneme city limits, the city handles its own coastal review, so the first question on a beach call is which counter owns the address.
The Coastal Commission’s sign-off shapes the rulebook before any project. When the County amends the program, the page lists three steps: the County completes any required follow-up actions, the Commission’s Executive Director determines in writing that those actions are legally adequate, and the Commission concurs. Phase 2C, on environmentally sensitive habitat areas, shows the pace. The Board of Supervisors approved it on October 19, 2021, the Commission certified it with modifications on April 6, 2022, the Board accepted those on July 26, 2022, and the amendments took effect on September 9, 2022.
The page publishes no day count for a single job, so do not invent one. It does say the Categorical Exclusion Orders exempt certain categories of development from coastal-zone review because they have no possibility of causing environmental impacts, so a small project may skip the step while work near habitat or the shoreline should expect it. Treat the coastal step as its own schedule line and confirm it at the Planning counter before quoting a start date.
Ventura County Planning Division, Local Coastal Program UpdateIs the address in unincorporated Ventura County or inside a city?
Ventura County’s Planning Division only rules on unincorporated land, and its ADU page covers the non-coastal part of that territory. The County adopted a rewritten ADU and JADU ordinance on June 4, 2024, effective July 3, 2024, and in January 2025 the state housing department confirmed it complies with state law. Oxnard, Ventura, Thousand Oaks, Simi Valley, Camarillo, and Moorpark each keep their own ordinance and building counter, so a Santa Rosa Valley address and a Thousand Oaks address can follow different rules.
The County runs two ADU tracks. A unit that meets state criteria goes straight to a building approval with no Planning step. One that does not needs a Zoning Clearance first. On a single-family lot the direct track caps a detached ADU at 850 square feet, while the Zoning Clearance track allows up to 1,800 square feet depending on lot size. Multifamily lots get detached units up to 1,200 square feet, and a JADU tops out at 500. Two ADUs and one JADU can share a single-family lot. Side and rear setbacks are four feet, and height runs 16 feet above grade, or 18 feet on multistory multifamily lots or near transit, plus two feet to match the roof pitch.
Two details matter on scoping calls. JADUs are not allowed in the County’s coastal zones until the Coastal Commission certifies the revised coastal ordinance. The County also hands out free standardized detached-ADU plans in one-, two-, and three-bedroom layouts, so a caller who mentions the County plans is partway to plan check.
Ventura County Planning Division, Accessory Dwelling UnitsWhat is unincorporated Ventura County building right now?
The County’s 2025 annual progress report, submitted to the Board of Supervisors on March 24, 2026, counts 152 building approvals for new residential units in the unincorporated county during 2025: 34 in the Ojai Valley, 30 near Camarillo, 26 in Piru, 20 near Thousand Oaks and Simi Valley, and 42 elsewhere. ADUs and JADUs were the most common dwelling type at 98 approvals, ahead of 54 single-family homes, and the County says ADUs now lead every other type for the cycle. Of those 98, 80 used the streamlined track that approves qualifying units directly at building plan check.
Since October 16, 2021, the County has approved 447 ADUs and JADUs, about 56 percent of all residential building approvals in the cycle and roughly 80 percent of its 560-unit ADU target for 2021 through 2029. ADU production rose 43 percent from 2024 to 2025. The larger ongoing projects the report names are Santa Rosa Valley Estates and the Finch Tract in Piru. Approvals for detached homes fell in 2025, and the report says rebuilding after the Mountain Fire absorbed some of the year’s activity.
That fire, in November 2024, destroyed over 200 structures in Las Posas Estates, Camarillo Heights, Somis, and the City of Camarillo. The County’s table counts 211 dwelling units lost. Within a year, owners of 60 of those units had filed rebuild applications, 28 had a building approval in hand, and none had finished by December 31, 2025. The report warns that financial strain on those owners may slow new housing. For a contractor, that is a long rebuild tail.
County of Ventura, 2025 Annual Progress Report for the General Plan and Housing Element