Camarillo ADU permits are now digital-only through the OpenGov portal (since July 1, 2025). The city completes ministerial review within 60 days of a complete application. Construction costs range from $50,000 for a garage conversion to $280,000 for a detached unit. Add $7,000–$18,000 in permit fees, Pleasant Valley School District fees (~$3.36/sq ft for units 500+ sf), design, and utility connections. Total timeline: 5–9 months from design to move-in.
Camarillo fundamentally changed its ADU permitting system on July 1, 2025. Everything now goes through the OpenGov digital portal. Paper submissions are no longer accepted. The city approves code-compliant ADUs ministerially — meaning no discretionary review, no hearings, and a guaranteed 60-day review timeline if your application is complete.
This is faster and more transparent than many Ventura County cities. But it also means your submittals must be complete the first time. A missing detail sends your application back for revisions, which resets the clock.
We've been building ADUs in Camarillo and across Ventura County for over 20 years. This guide covers the 2026 rules in full — what the OpenGov portal requires, what you can build, setback and height rules, school fees, costs, and the realistic timeline to get your permit and start construction.
The Permit Process: Ministerial Review, Not Discretionary
Digital-only submissions through OpenGov portal — 60-day ministerial review for complete applications.
California state ADU law (AB 68, AB 881, SB 13) requires Camarillo to approve code-compliant ADUs by ministerial review. This means the city checks your plans against a standard checklist — setbacks, height, lot coverage, parking, fire safety — but cannot deny or impose special conditions based on discretion or neighborhood preference.
The ministerial review timeline is firm: 60 days from the date you submit a complete application. If your application is incomplete, the clock doesn't start until you submit everything required. Once the 60-day clock starts, the city must either approve your ADU or send you corrections.
The OpenGov digital portal makes this clearer than older cities with physical permit counters. You submit your plans, you get a confirmation email with your application number, and you can track the review online. No guessing. No waiting for a phone call.
Size, Setback & Height Rules
Camarillo allows three types of ADUs. Here are the key dimensions:
Detached ADU
Attached ADU (or Upper-Story ADU)
Junior ADU (JADU)
A key advantage: Camarillo allows up to two ADUs on one lot — one detached ADU plus one Junior ADU. This is more flexible than some Ventura County cities.
Where ADUs Are Allowed
ADUs are permitted in all residential zones in Camarillo — R-A, R-E, R-O, R-1, R-2, R-3, R-H — and in mixed-use zones that allow residential uses. No minimum lot size is required. Your ADU can go on any lot with an existing primary dwelling.
Before you design, contact the City of Camarillo Public Works Department at (805) 388-5395 to confirm your property has no environmental or infrastructure constraints. Some sites have flood hazard zones, soils issues, seismic faults, or sewer/water connection challenges that can add cost or delay approval.
Permit Costs & Fees
Here's the full cost breakdown for a typical ADU project in Camarillo:
Architectural & Engineering Design
Professional designs (architectural + structural): $2,000–$8,000
Building Permits & Plan Check
City plan check: ~$500–$1,200
Building permit: ~$800–$1,500
Mechanical/electrical/plumbing permits: ~$300–$600
Subtotal: $1,600–$3,300
Pleasant Valley School District Developer Fee
Rate: ~$3.36/sq ft (2024 confirmed; call to verify 2026 rate)
ADUs under 500 sq ft: Exempt
600 sq ft ADU: ~$2,000
800 sq ft ADU: ~$2,700
Contact: (805) 388-5395
Utility Connections
Water/sewer meters: $400–$1,200
Electrical service upgrade: $500–$2,000
Subtotal: $900–$3,200
Total Permit & Fee Costs: $7,000–$18,000
(Varies by ADU size and site conditions)
Construction Costs by ADU Type
Here are realistic 2026 costs for quality construction in Camarillo and Ventura County:
Garage Conversion
Scope: Convert existing 1-car or 2-car garage to 400–500 sq ft living space
Cost: $50,000–$80,000 ($125–$160/sq ft)
Timeline: 8–12 weeks
Attached ADU (Addition)
Scope: 600–800 sq ft addition to primary dwelling
Cost: $100,000–$180,000 ($140–$200/sq ft)
Timeline: 16–20 weeks
Detached ADU
Scope: 600–800 sq ft detached unit with full mechanical systems
Cost: $150,000–$280,000 ($180–$280/sq ft)
Timeline: 18–24 weeks
These estimates include framing, roofing, drywall, fixtures, appliances, and finishes. They do NOT include land, permits, design, or site work (grading, drainage, paving).
Rental Income Potential
A well-finished 600–800 sq ft ADU in Camarillo typically generates strong rental income. Local 1-bedroom rents average $2,500–$2,750/month. A well-maintained ADU with modern finishes typically rents for $2,100–$2,500/month.
Timeline to Occupancy
Here's what realistic 2026 timing looks like from start to move-in:
| Phase | Duration | Notes |
|---|---|---|
| Design & Engineering | 3–4 weeks | Architect creates plans; structural engineer stamps |
| OpenGov Submission | 1 week | Upload complete documents to portal |
| Initial Plan Check | 3–4 weeks | City reviews; issues corrections or approval |
| Correction Cycle (if needed) | 2–4 weeks | Revise plans; resubmit; wait for re-review |
| Approvals & School Fee | 2 weeks | Pay school fee; obtain all clearances |
| Building Permit Issuance | 1 week | City issues formal building permit |
| PERMIT PHASE TOTAL | 5–9 months | Design through permit-in-hand |
| Construction | 12–20 weeks | Depending on ADU type |
| Final Inspection & CO | 2 weeks | City issues certificate of occupancy |
| TOTAL PROJECT | 9–13 months | Design through move-in |
Common Mistakes That Delay Permits
Incomplete plan submissions
Missing structural calculations, energy compliance, or site details. OpenGov requires everything upfront. Incomplete = 2–4 week reset.
Plans that don't match city zoning
Undersized setbacks, too much height, or wrong design. Verify dimensions BEFORE design.
Underestimating school fee impact
Not confirming Pleasant Valley SD fee rate early. Budget $2,000–$3,500 to be safe.
Forgetting utility feasibility
No check with Public Works on sewer/water capacity. Some sites need costly extensions.
Design that doesn't match primary dwelling
City requires exterior colors, materials, and roofline harmony. Plan this upfront with your architect.
Frequently Asked Questions
How long is the OpenGov portal approval process?
60 days from a complete application. If your application is incomplete, the clock doesn't start until you submit everything the city requires. Plan for 5–6 weeks to review + corrections, then 1–2 weeks to final approval.
Can I build a 1,000 sq ft ADU in Camarillo?
Only if it's attached or on the same lot as the primary dwelling. Detached ADUs max out at 800 sq ft.
Are ADUs allowed in all Camarillo neighborhoods?
Yes, in all residential zones (R-A, R-E, R-O, R-1, R-2, R-3, R-H) and mixed-use zones allowing residential. No neighborhood exclusions.
How much will I pay Pleasant Valley School District?
If your ADU is under 500 sq ft, nothing. If 500+ sq ft, pay ~$3.36/sq ft (2024 rate). Call (805) 388-5395 to confirm the 2026 rate.
Can my ADU have a separate entrance and utilities?
Yes. Detached and attached ADUs have independent meters and services. Junior ADUs share one wall and utilities with the primary dwelling.
What happens if my application is incomplete?
The city sends a letter outlining what's missing. You revise and resubmit through OpenGov. The 60-day clock restarts from your resubmission date.
How much rent should I charge for my ADU?
Market data shows $2,100–$2,500/month for a well-finished 600–800 sq ft unit in Camarillo. That's competitive with 1-bedroom apartments locally.
Ready to Build Your Camarillo ADU?
A Camarillo ADU is a smart investment — you're adding rental income, property value, and housing to one of Ventura County's most desirable neighborhoods. But the permit process and construction costs need professional guidance.
We've built dozens of ADUs across Camarillo and Ventura County. We know the OpenGov portal, the school district fees, the zoning rules, and the timeline. We also know what costs actually look like for quality construction.