ADU Builders & Home Addition Contractors in Camarillo, CA
Camarillo approves ADUs through a city Zone Clearance and building permit, with all plans submitted online since July 2025.
Building ADUs and additions in Camarillo
Quick answer: In Camarillo, ADUs and additions are reviewed by the city's Community Development Department. ADUs are permitted in all residential zones and are approved through a Zone Clearance, followed by a building permit, and all plans are submitted through the city's OpenGov portal. Camarillo is outside the Coastal Zone, but parts of the city are in Very High Fire Hazard Severity Zones.
Camarillo is an incorporated Ventura County city. Its Community Development Department has a Planning Division, which applies the zoning and development standards in the Camarillo Municipal Code, and a Building and Safety Division, which reviews and inspects building work including additions. Ventura County RMA does not review parcels inside city limits.
The city says ADUs are permitted in all residential zones and follow a streamlined Zone Clearance, followed by a building permit prepared by a professional. Since July 1, 2025, Camarillo accepts plans only through its OpenGov online portal, and its ADU Navigator walks through standards, submittal requirements and potential fees.
Site checks matter here. Some properties are in seismic fault zones or special flood hazard areas, Public Works can require right-of-way dedication, utility connections, grading plans or soils reports, and CAL FIRE's 2025 maps include Very High Fire Hazard Severity Zones within the city.
Camarillo permitting — city Zone Clearance and building permit
For a parcel inside city limits, the Camarillo Community Development Department at 601 Carmen Drive handles both planning and building review. ADUs go through a Zone Clearance and then a building permit, and the city encourages applicants to contact Planning and Public Works before submitting. All submittals go through the OpenGov portal.
Camarillo is outside the California Coastal Zone, so projects do not need a coastal development permit. The Ventura County Fire Department serves the city, and its fire protection district adopted the 2025 Fire Hazard Severity Zone maps effective July 1, 2025; where a parcel has more than one zone, the highest applies to the whole parcel. The Fire Department also confirms whether an ADU needs fire sprinklers.
- City of Camarillo — Accessory Dwelling Units The city's ADU guide: types, Zone Clearance process, plan contents and the ADU Navigator.
- Camarillo Community Development Department Planning and Building and Safety divisions at 601 Carmen Drive.
- Camarillo OpenGov permit portal Online submittal portal for permit applications since July 1, 2025.
- Ventura County Fire — Fire Hazard Severity Zones Adoption of the 2025 fire hazard maps and the parcel map viewer.
- California HCD ADU Handbook State-level ADU baseline that every California city and county must permit at minimum.
Local rules, fees, and site conditions change and vary by parcel. Always confirm current requirements with the reviewing department for your address — this page is general information, not legal or code advice.
Site conditions that affect Camarillo projects
- Very High Fire Hazard Severity Zones within city limits; on a split parcel the highest zone applies.
- Seismic fault zones and special flood hazard areas that the city says can affect ADU eligibility.
- Public Works requirements such as right-of-way dedication, utility connections, grading plans and soils reports.
- Fire Department review of whether the ADU needs fire sprinklers.
- A solar electric system on new detached ADUs.
- Water service from one of several providers, depending on the parcel.
What we build most often in Camarillo
Budgeting your Camarillo ADU or addition
Every number we publish is a preliminary planning range, not a quote. Cost in Camarillo moves with unit size, design complexity, site conditions, utility work, jurisdictional requirements, and finish level. Use our cost estimator to build a starting range, then we produce a detailed construction proposal after feasibility and design work is complete.
Camarillo ADU questions, answered
How are ADUs approved in Camarillo?+
The city says ADUs are permitted in all residential zones and follow a streamlined Zone Clearance, followed by a building permit. Plans are submitted through the city's OpenGov portal, and the city encourages applicants to contact Planning and Public Works before submitting.
Does a Camarillo ADU need a coastal permit or a fire-zone check?+
No coastal permit is needed, because Camarillo is outside the California Coastal Zone. Fire zones are different: CAL FIRE's 2025 maps include Very High Fire Hazard Severity Zones in Camarillo, adopted by the Ventura County Fire Protection District effective July 1, 2025, so checking the parcel's zone is an early step.
Can flood or fault zones affect an ADU in Camarillo?+
Yes. The city notes that some properties are in seismic fault zones or special flood hazard areas that may affect the ability to build an ADU, and it directs owners to Public Works to check a property before design.
Nearby areas we build in
Further reading
Keep exploring
Everything you need to plan an ADU, garage conversion, or addition on a property in Camarillo.