Prefab ADUs in Ventura
Ventura's ADU permits jumped 76% in a year — and outside a small coastal area, the City requires no parking for an ADU. We deliver an all-in prefab ADU from our factory in Lathrop — permits, foundation, delivery and installation included — at one fixed price.
Free lot check · zoning, setbacks, utilities · reply with a fixed price
Licensed builder · Our own factory in Lathrop, CA
Real homes we build, start to finish
Quick answer
ADUs in Ventura — key facts for 2026
Most Ventura homeowners can add a detached ADU of up to 1,200 sq ft, with no parking outside the coastal parking area and no impact fees under 750 sq ft. Bay Modular delivers a factory-built ADU all-in for $124,900–$271,900 — the same price anywhere in California.
- Can I build an ADU in Ventura?
- Yes, on most residential lots with a house. Ventura allows a detached ADU up to 1,200 sq ft, 16 ft tall, with 4-ft side and rear setbacks (Ordinance 2023-09).
- How long does a Ventura ADU permit take?
- ADUs are approved ministerially with a building permit; state law requires a decision within 60 days of a complete application.
- What fees does Ventura charge?
- No impact fees under 750 sq ft; larger ADUs pay proportionally. School, sewer and water fees apply; school fees only over 500 sq ft.
- How much does a prefab ADU cost in Ventura?
- Bay Modular: $124,900–$271,900 all-in, the same price as anywhere in California, permits and installation included.
- How many ADUs does Ventura build?
- 137 ADU permits in 2025, up from 78 in 2024 — about one in three new homes permitted in the city.
- What does an ADU rent for in Ventura?
- Average asking rent in Ventura was $2,888 a month in August 2026 (Zillow), up 34% since January 2021.
Sources: HCD APR 2025, City of Ventura Ordinance No. 2023-09 (Ch. 24.430) and ADU page, Zillow ZORI Aug 2026. Last reviewed October 2026.
Ventura in numbers
Ventura’s ADU permits are climbing fast
ADU permits rose from 78 in 2024 to 137 in 2025 — about one in three new homes permitted in Ventura last year was an ADU. (Earlier years are incompletely reported in state data, so we don’t show them.)
ADU permits issued in the City of Ventura
Source: California HCD Annual Progress Report data (Table A2), City of Ventura, permits issued per year. Percent = ADUs among all housing units permitted in the city that year.
average Ventura asking rent since January 2021 ($2,149 → $2,888)
Zillow Observed Rent Index, City of Ventura, Aug 2026more ADU permits in 2025 than in 2024 (78 → 137)
HCD APR data, 2024–2025Can I build in Ventura?
Most Ventura lots with a house can add an ADU
Ventura’s ADU rules (Ordinance No. 2023-09) follow state law with a few local details. Here is what matters for most homeowners:
A detached new ADU can be up to 1,200 sq ft — all our models fit. Conversions of existing space can be larger.
4 ft from side and rear lot lines; one story, 16 ft tall (18 ft near major transit, plus up to 2 ft to match the roof).
None required — except in the Coastal Zone's ADU Mandatory Parking Area, where one space is needed.
One ADU and one JADU on a single-family lot under state law.
ADUs can be rented only for terms longer than 30 days and can't be sold separately from the house.
Ventura offers free standardized ADU plans with reduced review fees — we use our own HCD-approved designs.
Based on City of Ventura Ordinance No. 2023-09 (adopted Oct 23, 2023), Ch. 24.430. Not legal advice — rules depend on your exact lot. More in our ADU guides.
New in 2027: under AB 956 (Chapter 791, Statutes of 2026), from January 1, 2027 state law lets you build two detached ADUs on a lot with a single-family home, and HOA rules can’t block an ADU on a lot zoned to allow one.
Costs & fees in Ventura
What an ADU costs in Ventura
Same all-in price as anywhere in California. Our models are all under 750 sq ft, so none pays impact fees — and four of five pay no school fees.
| Model | All-in price | School fees | City impact fees |
|---|---|---|---|
| Backyard Studio120 sq ft · home office or guest studio, not a rentable ADU | $75,900 | $0 | $0 |
| Small Studio256 sq ft | $124,900 | $0 | $0 |
| Large Studio ADU320 sq ft | $154,900 | $0 | $0 |
| 1 Bedroom ADU480 sq ft | $214,900 | $0 | $0 |
| 2 Bedroom ADU640 sq ft | $271,900 | $3,443 | $0 |
Sources: Gov. Code §66311.5; Ed. Code §17620 and State Allocation Board 2026 school fee maximum; City of Ventura Ordinance 2023-09, Sec. 24.430.080. Launch pricing runs through December 31, 2026. Comparison is general — every project differs.
Renting in Ventura
Renting out an ADU in Ventura
average asking rent for all homes in Ventura — up 34% since 2021. HUD's 2027 fair rent for a 2-bedroom in the area is $2,424.
Zillow Observed Rent Index, City of Ventura, Aug 2026 · HUD FY2027 FMR ADU for rental incomeVentura ADUs can be rented only for terms longer than 30 days — plan on long-term tenants.
Owner occupancy applies only to a JADU, not to an ADU.
A new ADU is exempt from California's statewide rent cap (AB 1482) for 15 years after its certificate of occupancy.
Same money, other options
Yearly income per dollar, before taxes and costs. An ADU wins because you already own the land. Full comparison →
Sources: City of Ventura Ordinance No. 2023-09; Civil Code §1947.12. Comparison: HUD FY2027 2-bedroom Fair Market Rent, Oxnard-Thousand Oaks-Ventura area ($2,424) × 12 ÷ $271,900; U.S. Treasury (Oct 6, 2026); FTSE Nareit (Sep 2026); FDIC (Sep 2026). Not legal or investment advice.
Permits in Ventura
How your Ventura permit works — we handle it
Free lot check
Zoning, coastal parking area, setbacks, sewer, water and power for your Ventura address.
Plans & submittal
Our HCD-approved plans plus your site plan for the building permit.
City review
Ministerial plan check by Building & Safety; we answer comments.
Decision in 60 days
State law requires a decision on a complete ADU application within 60 days. Your ADU is built in our factory meanwhile.
Install & move in
Delivered from our Lathrop factory, installed in about a week, inspected, then your Certificate of Occupancy.
Based on City of Ventura Ordinance No. 2023-09 and Gov. Code §66317. Ventura also offers free standardized ADU plans.
Why now
Start your Ventura ADU with zero risk
Lock in launch pricing, see exactly what you get, and only decide once you have a fixed price for your lot.
All-in from $75,900 — everything included
- Backyard Studio (home office)$75,900All-in · fixed in writing
- Small Studio$124,900All-in · fixed in writing
- Large Studio ADU$154,900All-in · fixed in writing
- 1 Bedroom ADU$214,900All-in · fixed in writing
- 2 Bedroom ADU$271,900All-in · fixed in writing
Zero-risk start
- Free lot check & quoteNo obligation, no credit card.
- One fixed all-in priceDesign, permits, delivery and install — one number.
- HCD-approved plansState approval #1585366, financed and appraised like a home.
- 2-year warrantyOn materials and workmanship.
Visit our factory in Lathrop, CA and walk through a finished ADU.
Ventura ADU questions
Read our ADU guides, see all of California, or call (209) 214-6845.
Can I build an ADU on my lot in Ventura?
Most Ventura residential lots with a house can add a detached ADU of up to 1,200 sq ft, 16 ft tall, with 4-foot side and rear setbacks, plus a JADU. We check your address for free.
How much does an ADU cost in Ventura?
Our all-in prices are the same as anywhere in California: from $124,900 for a Small Studio to $271,900 for a 2 Bedroom ADU, with launch pricing through December 31, 2026. No impact fees under 750 sq ft, and school fees only above 500 sq ft.
How long does an ADU permit take in Ventura?
ADUs are approved ministerially with a building permit, and state law requires a decision within 60 days of a complete application. Your ADU is built in our factory at the same time, so most projects take 4–6 months from signing to keys.
Do I need parking for an ADU in Ventura?
No — unless your lot is in the Coastal Zone inside the City's ADU Mandatory Parking Area, where one space is required.
Can I rent my Ventura ADU on Airbnb?
No. Ventura ADUs may be rented only for terms longer than 30 days.
Do I have to live on the property?
No. Owner occupancy applies only to a JADU, not to an ADU.
Can Bay Modular deliver to Ventura?
Yes. We build in our Lathrop factory and deliver statewide at the same all-in price, including the Central Coast.
Is an ADU a better investment than other options in Ventura?
For most homeowners with room on their lot, yes: you don't buy land. A 2 Bedroom ADU at HUD's 2027 fair rent for a 2-bedroom in the Oxnard-Thousand Oaks-Ventura area ($2,424) earns about 12% a year on its price before costs, vs. about 5.3% for a 10-year Treasury. Not investment advice.
Free · no obligation
Can you build an ADU on your Ventura lot?
Send your Ventura address. We'll check zoning, coastal parking area, setbacks and utilities, and send a fixed all-in price — permits included.
HCD-approved plans (#1585366) · 2-year warranty · factory in Lathrop, CA
Sources: California HCD Annual Progress Report data, Table A2 (City of Ventura, 2024–2025, updated Oct 2026); Zillow Observed Rent Index, City of Ventura (Aug 2026); HUD FY2027 Fair Market Rents (Oxnard-Thousand Oaks-Ventura); City of Ventura Ordinance No. 2023-09 and ADU page. Prices: Bay Modular, October 2026. Not legal advice.