ADUs in Camarillo cost between $75,000 and $300,000+ in 2026 depending on type, size, and finish level. Garage conversions start around $75K–$130K. Standard detached ADUs land $150K–$220K. Premium builds run $220K–$300K+. Strong military rental demand from NAWS Point Mugu and Port Hueneme keeps vacancy low and rents at $1,800–$2,800/month. Safeway Construction — 20+ years in Ventura County, License #1066117, 5.0 Google.
In Camarillo, building an ADU costs between $75,000 and $300,000 in 2026, depending on whether you're converting an existing garage or building a new freestanding structure. The average 600-square-foot detached ADU in neighborhoods like Mission Oaks or the Constitution area lands between $150,000 and $220,000 once permits, utilities, and finishes are factored in.
Camarillo is one of the more straightforward cities to build an ADU in Ventura County. The City of Camarillo Community Development Department follows state ADU rules without layering on extra local overlays, which keeps the permitting process cleaner than in cities with additional requirements. Plan check runs 4–8 weeks. There's no coastal zone complication.
A strong rental market — driven partly by proximity to NAWS Point Mugu, Port Hueneme Naval Base, and Camarillo's position between Ventura and Thousand Oaks — means your investment starts generating income fast.
Before you meet with any contractor, get a working number for your property: SafewayQuickQuote.com gives you real Camarillo pricing in about 2 minutes. No contractor visit, no sales call.
ADU Cost in Camarillo: 3-Tier Breakdown (2026)
Tier 1 — Garage Conversion or JADU: $75,000–$130,000
The lowest-cost path to a permitted ADU. You're using existing square footage (typically a two-car garage) rather than building from the ground up. No new foundation, no new roofline.
- ●400–600 sq ft studio or one-bedroom conversion
- ●Insulation, drywall, LVP flooring, kitchenette
- ●Full bathroom, new electrical subpanel, separate entry
- ●City of Camarillo CDD permit fees and inspections
Older homes (pre-1985 in Camarillo Heights, Old Town) often need panel upgrades ($3,500–$8,000). Most finished garage conversions come in at $85,000–$115,000.
Tier 2 — Standard Detached ADU: $150,000–$220,000
Most common ADU type in Camarillo
A new freestanding structure in the backyard, fully self-contained, with a separate entrance and its own address.
- ●400–800 sq ft, studio or one-bedroom
- ●Full kitchen, full bathroom, foundation, framing, roofing
- ●Electrical, plumbing, HVAC, utility tie-in
- ●Stucco exterior typical for Camarillo neighborhoods
A 600 sq ft unit with standard finishes on a flat lot: $165,000–$195,000. Complex lots or premium finishes push toward $210,000–$220,000.
Tier 3 — Premium or Large Detached ADU: $220,000–$300,000+
800–1,200 sq ft, two-bedroom layout, or high-end finishes designed to maximize rental income. This tier makes sense in Spanish Hills, Camarillo Heights, or when matching the quality of a higher-value primary home.
- ●Two bedrooms, two bathrooms or one-bedroom with office
- ●Semi-custom cabinetry, stone countertops, premium exterior
- ●Separate water meter, EV charger rough-in, in-unit laundry
At $2,400–$2,800/month rental income, a $250,000 two-bedroom ADU in Spanish Hills reaches full payback in roughly 7–8 years and adds $180,000–$220,000 in property value from day one.
Per-Component ADU Cost Breakdown — Camarillo (2026)
| Component | Cost Range | Notes |
|---|---|---|
| Architectural drawings & plans | $5,000–$12,000 | Structural engineering included on larger units |
| City permit fees (CDD) | $4,000–$9,000 | Based on project valuation |
| School developer fees | $0–$5,500 | Exempt under 750 sq ft (SB 543) |
| Water & sewer connection | $4,000–$10,000 | Separate meter: add $3,000–$5,500 |
| Grading & site prep | $2,000–$8,000 | Flat lots: low end. Sloped/ag lots: higher |
| Foundation (slab) | $10,000–$22,000 | Engineered on complex lots |
| Framing | $18,000–$35,000 | Scales with unit size |
| Roofing | $6,000–$14,000 | Concrete tile common in Camarillo |
| Exterior finish (stucco) | $7,000–$15,000 | Matches most Camarillo housing stock |
| Windows & exterior doors | $4,500–$10,000 | Egress-compliant required |
| Electrical (panel + rough-in + finish) | $8,000–$15,000 | Pre-1985 homes may need upgrade |
| Plumbing rough-in & finish | $10,000–$20,000 | Full bath + kitchenette on standard run |
| HVAC (mini-split system) | $4,500–$9,000 | Single-zone common for ADUs |
| Insulation & drywall | $6,000–$12,000 | Title 24 energy compliance included |
| Flooring | $4,000–$10,000 | LVP standard; tile/hardwood adds cost |
| Kitchen cabinets & countertops | $6,000–$18,000 | Stock to semi-custom range |
| Bathroom tile & fixtures | $4,000–$12,000 | Standard to mid-grade |
| Interior doors, trim, paint | $3,000–$7,000 | |
| Landscaping & site cleanup | $1,500–$4,000 |
Total range for a 600 sq ft detached ADU: $150,000–$220,000 (mid-grade finishes, standard lot conditions).
City of Camarillo ADU Permit Process and Fees
ADU permit applications go through the City of Camarillo Community Development Department (CDD) at 601 Carmen Drive.
Plan check timeline: 4–8 weeks
Garage conversions/JADUs typically faster (3–6 weeks). Budget 2–3 rounds of comments for first-time submissions.
Permit fees: $4,000–$9,000
Covers plan check, building permit, and inspections. Garage conversions: $2,500–$5,500.
SB 543 school fee exemption: ADUs under 750 sq ft
Building at 749 sq ft saves $4,000–$5,500 vs. crossing the threshold. Design around this number.
Total permit costs (all fees): $8,000–$15,000
No extra ADU-specific overlays beyond state minimums. Ministerial approval only per AB 2221.
ADU Permit Timeline by Project Type
| ADU Type | Design | Plan Check | Construction | Total |
|---|---|---|---|---|
| Garage conversion / JADU | 3–6 wks | 3–6 wks | 8–14 wks | 4–7 months |
| Attached ADU (addition) | 5–8 wks | 4–8 wks | 12–18 wks | 5–8 months |
| Standard detached | 6–10 wks | 4–8 wks | 14–20 wks | 6–9 months |
| Premium / large detached | 8–12 wks | 5–9 wks | 18–26 wks | 8–11 months |
ADU Rental Income in Camarillo
Camarillo's rental market has a notable advantage: military housing demand from NAWS Point Mugu (18 miles southwest) and Port Hueneme Naval Base creates consistent, year-round demand from service members and civilian employees. This keeps vacancy rates low and rents stable.
| ADU Size | Monthly Rent | Annual Income |
|---|---|---|
| Studio / Garage conversion (350–500 sq ft) | $1,800–$2,100 | $21,600–$25,200 |
| 1-Bedroom detached (500–700 sq ft) | $2,000–$2,400 | $24,000–$28,800 |
| 2-Bedroom detached (700–1,000 sq ft) | $2,400–$2,800 | $28,800–$33,600 |
ROI example: A $185,000 one-bedroom ADU renting at $2,200/month generates $26,400/year. Property value increase: $160,000–$190,000. Cash payback: 7–8 years. Net position at year 10: $264,000 in cumulative rent + $170,000 in added property value = $434,000 return on a $185,000 investment.
What will your Camarillo ADU cost?
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Neighborhood-Specific ADU Pricing
Mission Oaks: $155,000–$200,000 (detached) | $80,000–$110,000 (garage)
Newer housing stock (1980s–2000s), flat lots, well-established utilities. Panels generally adequate (150–200 amp). No HOA in most sections. Standard permitting timeline.
Constitution Area: $150,000–$195,000 (detached) | $75,000–$105,000 (garage)
West of Las Posas Road, housing from late 1970s–1990s. Lot sizes typically sufficient for detached ADUs. Older homes may need electrical panel upgrades.
Spanish Hills: $220,000–$280,000+ (premium detached)
Camarillo's most affluent neighborhood. Larger lots, custom homes, HOA architectural review requirements. ADU budgets trend toward premium tier. Rental income and property value add are proportionally higher.
Camarillo Heights: $175,000–$240,000 (detached)
Elevated parcels, hillside lots, some agricultural zoning adjacency. Higher site prep and foundation costs. Confirm lot zoning before starting plans.
Old Town & Central Camarillo: $85,000–$125,000 (garage) | $155,000–$210,000 (detached)
Older stock (1940s–1970s), smaller lots. Garage conversions most common due to lot constraints. Electrical upgrades nearly universal. Partial repiping may be required.
Leisure Village: Restrictions Apply
55+ active adult community. HOA restrictions are significant. Not all lots support ADU additions. Confirm with the Leisure Village HOA before investing in plans.
Camarillo ADU Cost vs. Nearby Cities
| City | Garage | Standard | Premium |
|---|---|---|---|
| Camarillo | $75K–$130K | $150K–$220K | $220K–$300K |
| Oxnard | $80K–$130K | $150K–$220K | $220K–$280K |
| Thousand Oaks | $85K–$140K | $160K–$230K | $225K–$310K |
| Simi Valley | $70K–$120K | $140K–$200K | $200K–$270K |
| Ventura | $80K–$130K | $155K–$225K | $220K–$295K |
Frequently Asked Questions
How much does an ADU cost per square foot in Camarillo?
Standard detached ADUs run $280–$380 per square foot for mid-grade construction. Garage conversions run $175–$280 per square foot. Premium finishes or complex lots push toward $350–$420 per square foot.
How long does it take to build an ADU in Camarillo?
Standard detached: 6–9 months. Garage conversions: 4–7 months. Large detached with complex lots: 8–11 months. The City of Camarillo CDD runs 4–8 weeks on plan check.
Do Camarillo ADUs qualify for the SB 543 school fee exemption?
Yes. ADUs under 750 square feet are exempt from most school developer fees. A 749 sq ft ADU saves $4,000–$5,500 compared to one that crosses the threshold. Design around this number if you're on the edge.
Are there extra ADU restrictions in Camarillo?
No. Camarillo follows California state ADU rules without city-specific overlays. Ministerial approval only. No public hearings, no neighbor notification, no discretionary review.
What permits are needed for a Camarillo ADU?
Building, electrical, plumbing, and mechanical permits from the City of Camarillo CDD. Water meter connections coordinated with Calleguas Municipal Water District. Sewer through the Camarillo Sanitary District.
Will a Camarillo ADU increase my property taxes?
Yes. Prop 13 reassesses only the new construction. For a $180,000 ADU, expect roughly $1,800–$2,100/year increase. At $2,200/month rental income, that's a manageable cost of doing business.
Can I build an ADU in Camarillo if I have an HOA?
State law (AB 2221) prevents HOAs from banning ADUs outright. Your HOA can require architectural review. Leisure Village has significant restrictions worth investigating first. Spanish Hills HOAs typically require committee approval, adding 30–60 days. Submit your HOA application in parallel with your city permit.
Ready to Build Your Camarillo ADU?
Camarillo is one of the cleaner ADU markets in Ventura County. Straightforward city permitting, strong rental demand from military and civilian renters, and no coastal zone friction make it a solid project for homeowners with adequate lot space.
We've built ADUs across Camarillo, Oxnard, Simi Valley, and Thousand Oaks for over 20 years. We know what Camarillo CDD reviewers look for on first submission, how to design around the SB 543 fee thresholds, and how to give you a realistic timeline from day one.
Get your Camarillo ADU cost estimate in 2 minutes: SafewayQuickQuote.com. Or call us directly at (805) 222-6544.