Bolthole Index

Ventura County, California

Building permits, zoning and septic rules in Ventura County, California

23Index Score / 100
#54 of 58 in California

Unincorporated Ventura County, California generally requires a building permit from the county's Resource Management Agency before construction, although some small projects and minor improvements are exempt1. Every unincorporated parcel has county zoning, under separate Coastal and Non-Coastal ordinances, while incorporated cities run their own zoning23. RMA Environmental Health issues septic permits only in unincorporated areas, where each new system needs a site-specific evaluation45.

At a glance

Building permit
Generally required before construction in unincorporated Ventura County, with exemptions for some small projects and minor improvements1
Zoning
Every unincorporated parcel is zoned under either the Coastal or Non-Coastal ordinance; cities administer their own zoning23
Septic
RMA Environmental Health handles unincorporated areas; each new system requires a site-specific evaluation45
Owner-builder
California's owner-builder exemption covers contractor licensing only; the county still requires a permit in the owner's name, a Notice to Property Owner acknowledgment and an inspection67
RV living
Temporary RV housing is allowed during permitted home construction; non-coastal RV parks limit stays to 90 days in any 120-day period891011
Tiny homes
A tiny home outside the manufactured-home, factory-built, RV, park-trailer and camping-cabin classes must meet the California Building Standards Code; RV-style tiny homes in non-coastal RV parks are limited to 90 days in any 120-day period1213
Minimum home size
No county minimum confirmed; California's efficiency-unit standard sets 190 square feet of living space, or 150 square feet where a local ordinance allows it14
Wells
The countywide moratorium on new well permits in unincorporated areas has been lifted, but local moratoria in some basins may still apply15
Federal land
About 52% of the county is federal land (Los Padres National Forest and the Channel Islands)16

Who to call

Building permits

Ventura County Resource Management Agency, Building and Safety Division

Building permits and code enforcement for unincorporated Ventura County

(805) 654-2494

800 S Victoria Ave, Ventura, CA 93009

Online permits →

Zoning

Ventura County Resource Management Agency, Planning Division

Zoning ordinance administration, permit applications and 'What's My Zoning' lookups for unincorporated Ventura County

(805) 654-2494

800 S Victoria Ave, Ventura, CA 93009

Septic permits

Ventura County Resource Management Agency, Environmental Health Division

Onsite wastewater treatment system (OWTS/septic) design review, construction and repair permits, and inspections for unincorporated Ventura County; has no jurisdiction inside city limits or over systems serving mobile home parks

(805) 477-7136

800 S Victoria Ave, Ventura, CA 93009

Contact details are copied from each office’s official page and were checked against it on October 16, 2026.

Off-grid gear

Going off-grid in Ventura County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Ventura County, California?

Yes. Buildings and structures in unincorporated Ventura County generally need a permit from RMA Building and Safety before construction starts, but some small storage sheds, flooring and most residential finish work are exempt; public schools, hospitals, utility infrastructure and public-right-of-way projects also fall outside the ordinary county permit rule1. Work that needs a permit is inspected by the Building Division: the owner or contractor calls for each inspection, and required work must stay exposed until the Building Official approves it17. California's owner-builder exemption concerns contractor licensing, not the permit or inspection requirements6. In Ventura County, the owner-builder permit is taken out in the owner's name, and Building and Safety requires a signed Notice to Property Owner acknowledging liability, plus verified owner identification, before issuing it7.

Who is the Ventura County building department, and how do you reach them?

RMA Building and Safety issues building permits for unincorporated Ventura County only1. Inside Camarillo and Fillmore, the city's own office handles building permits1819; in every other incorporated city, call that city's building department. RMA Building and Safety is at 800 S Victoria Ave, Ventura, CA 93009, phone (805) 654-2494, and permits can also be tracked through the county's OneStopPermits portal20. Construction in unincorporated Ventura County is governed by the 2025 Ventura County Building Code, which adopts the current California Building Standards Code with county-specific amendments21. Fees aren't a flat number: Building and Safety calculates them based on the size, scope and value of your specific project during the permitting process22.

Does Ventura County have zoning, and does it matter which zone you're in?

Yes. Every parcel in unincorporated Ventura County has a county zoning designation2. RMA Planning applies the Coastal Zoning Ordinance in the Coastal Zone and the Non-Coastal Zoning Ordinance elsewhere; the two codes differ in substantive ways323. Inside Camarillo, Fillmore, Simi Valley and Port Hueneme, the city's own code sets zoning instead24252627. In the Non-Coastal ordinance, lot coverage, setbacks and height are set district by district, so no single countywide number applies2829. Setbacks are an example: RA zoning requires 5 feet on the interior side and 10 feet at the rear, while OS-REC requires 20 feet at the front29. Height in OS-REC starts at 25 feet and can rise to 35 feet when each side-yard setback is at least 15 feet30. Greenhouses and similar plant-growing structures on agriculturally designated lots are excluded from the lot-coverage maximum28. In the non-coastal area, an accessory dwelling unit can be approved directly with a building permit, and a manufactured home can serve as the ADU3132. For minimum home size, Ventura County's reviewed materials show no separate local rule; California's efficiency-unit standard calls for at least 190 square feet of living space, or 150 square feet if a local ordinance allows it14.

How do septic (OWTS) permits work in Ventura County?

RMA Environmental Health is the OWTS authority for unincorporated Ventura County; the city building department is the contact for systems inside city limits, while mobile home park systems are outside the county division's jurisdiction433. Septic permits stay with Environmental Health or the city, never with RMA Building and Safety, even where a city issues its own building permits. Off-grid sanitation is possible through an OWTS where public sewer is unavailable, but every new system needs an individual site evaluation before a Permit to Construct is issued5. Septic permits and inspections cover both new systems and repairs3435. A property requiring a conventional OWTS must connect when an available public sewer line is within 200 feet36. For an alternative OWTS, the public-sewer connection threshold is one-half mile37. Only about 11.1% of county soils avoid severe limits for a conventional drain field, so establish feasibility early38.

Can you live in an RV or tiny home on your land in Ventura County?

Ventura County's confirmed RV-on-private-land allowances are tied to construction, not a general right to live in an RV. In the unincorporated non-coastal area, a Zoning Clearance may authorize one habitable RV for up to 12 months during permitted construction or major remodeling of a principal dwelling, with up to two additional 12-month periods for substantial progress8. The Coastal Zone allows an owner's RV for 12 months during permitted home construction, with one additional 12-month period for substantial progress and required permanent water and sewage connections9. In non-coastal RV parks, each RV or its occupants may stay no more than 90 days in any 120-day period; those parks require a Conditional Use Permit and are limited to specified zones1011. A tiny home outside the manufactured-home, factory-built, RV, park-trailer or camping-cabin classifications is a dwelling and must comply with the California Building Standards Code for legal occupancy12. Tiny-home-style RVs, travel trailers and truck campers in non-coastal RV parks share that limit; such parks need at least 3 acres on one legal lot, allow no permanent structure attached to a space, and are allowed only in OS-REC, OS, RA and RE zones with a Conditional Use Permit3913. Manufactured homes may be dwellings in an authorized unincorporated mobilehome park, subject to the overlay, base-zone, building and state requirements40. Ventura County has not confirmed a general rule for overnight camping outside parks or construction allowances; ask RMA Planning about the parcel and unit23.

Building a home in Ventura County: the steps, in order

  1. Confirm the parcel's Coastal or Non-Coastal zoning with RMA Planning, and determine whether any proposed lot split or lot-line adjustment must follow the county Subdivision Ordinance2341.
  2. If you need a well, ask about restrictions in the parcel's groundwater basin; local moratoria may remain even though the countywide unincorporated-area moratorium was lifted15.
  3. If public sewer is unavailable, obtain a site-specific OWTS evaluation from RMA Environmental Health before fixing the site plan533.
  4. Apply through RMA Building and Safety under the 2025 Ventura County Building Code, and sign the Owner-Builder Declaration if applicable20217. Call for each inspection and keep required work exposed until it passes17.
  5. If the site lies in a FEMA-designated 1% annual-chance floodplain, obtain a Floodplain Development Permit before construction42.

What to check before you buy land in Ventura County

Confirm the parcel's Coastal or Non-Coastal zoning and whether a proposed division, merger or lot-line adjustment triggers the Ventura County Subdivision Ordinance4341. In the Non-Coastal Zoning Ordinance, minimum lot area runs by district: RA is 1 acre, OS is 10 acres and AE is 40 acres, so confirm the district before assuming a parcel can be split44. For wastewater, only about 11.1% of county soils avoid severe limits for a conventional drain field, and each new OWTS needs site-specific evaluation385. Check the groundwater basin because local well moratoria may remain15. A FEMA 1% annual-chance floodplain designation requires a development permit for habitable and non-habitable structures42. About 52% of the county is federal land, which limits the private rural inventory16. The effective property-tax rate is about 0.7%, and the median annual bill is about $5,3264546.

Watch-outs

  • Ventura County's Coastal and Non-Coastal RV-during-construction allowances have different approval, extension and utility conditions; use the rule for the parcel's zoning area89.
  • Short-term rentals are not permitted in the Non-Coastal Ojai Temporary Rental Unit Regulation Overlay Zone unless the dwelling was classified as a historic landmark as of June 19, 2018; homeshares may operate separately with a county permit47.
  • We could not confirm how Ventura County classifies a tiny home as a primary or accessory dwelling on a particular parcel, or rules for a county driveway-access standard or certificate of occupancy; confirm the proposed classification and site with RMA2023.
  • Well-permit moratoria in Ventura County are basin-specific and can change; even though the countywide moratorium in unincorporated areas has lifted, a city or Groundwater Sustainability Agency may still have its own restriction in effect for your specific basin15.
  • An agricultural shed under the 2025 Ventura County Building Code is exempt from a building permit only up to 120 square feet and more than 60 feet from other non-residential buildings larger than 6,000 square feet on the same parcel, and the exemption does not remove zoning, fire, health or environmental requirements48.
  • The agricultural exemption in the county's Habitat Connectivity and Wildlife Corridor rules covers activities such as commercial crops, internal driveways and certain fencing, but it is not a blanket exemption from building, zoning, fire or septic permits49.

Sources

  1. Building Permit Information - Ventura County Resource Management Agency, quoted and re-checked
  2. County Ordinances - Ventura County Resource Management Agency, quoted and re-checked
  3. County Ordinances - Ventura County Resource Management Agency, quoted and re-checked
  4. Septic Systems / Wastewater Disposal, quoted and re-checked
  5. Septic Systems / Wastewater Disposal, quoted and re-checked
  6. Before Applying for a License When No Exam is Required, quoted and re-checked
  7. Considering Becoming an Owner-Builder? - Ventura County Resource Management Agency, quoted and re-checked
  8. Ventura County Non-Coastal Zoning Ordinance (9-16-2025 edition), quoted and re-checked
  9. Ventura County Coastal Zoning Ordinance, quoted and re-checked
  10. Ventura County Non-Coastal Zoning Ordinance (9-16-2025 edition), quoted and re-checked
  11. Ventura County Non-Coastal Zoning Ordinance (9-16-2025 edition), quoted and re-checked
  12. HCD Information Bulletin 2016-01: Tiny Homes, quoted and re-checked
  13. Ventura County Non-Coastal Zoning Ordinance, quoted and re-checked
  14. California Health and Safety Code § 17958.1, quoted and re-checked
  15. Water Well Permit Restrictions, quoted and re-checked
  16. Federal land share: Bolthole Index county data
  17. Inspections - Ventura County Resource Management Agency, quoted and re-checked
  18. Camarillo: City of Camarillo Master Fee Schedule (Ventura County), quoted and re-checked
  19. Fillmore: Building & Safety | Fillmore, CA (Ventura County), quoted and re-checked
  20. Ventura County Resource Management Agency, Building and Safety Division (rma.venturacounty.gov)
  21. Ventura County Building Code (Current Edition), quoted and re-checked
  22. Permit Fees Collected by Building and Safety, quoted and re-checked
  23. Ventura County Resource Management Agency, Planning Division (rma.venturacounty.gov)
  24. Camarillo: Camarillo Code § 19.14.050 — R-1 lot area and lot width (Ventura County), quoted and re-checked
  25. Fillmore: 6.04.0415 - Zoning district development standards (Ventura County), quoted and re-checked
  26. Simi Valley: Simi Valley Municipal Code 9-24.020 Purposes of Residential and Open Space Zoning Districts (Ventura County), quoted and re-checked
  27. Port Hueneme: Port Hueneme Code 10403 R-1 Development standards (Ventura County), quoted and re-checked
  28. Ventura County Non-Coastal Zoning Ordinance, quoted and re-checked
  29. Ventura County Non-Coastal Zoning Ordinance, quoted and re-checked
  30. Ventura County Non-Coastal Zoning Ordinance, quoted and re-checked
  31. Accessory Dwelling Units - Ventura County Resource Management Agency, quoted and re-checked
  32. Accessory Dwelling Units - Ventura County Resource Management Agency, quoted and re-checked
  33. Ventura County Resource Management Agency, Environmental Health Division (rma.venturacounty.gov)
  34. Onsite Wastewater Treatment System (OWTS) Construction and Repair, quoted and re-checked
  35. Septic Systems / Wastewater Disposal, quoted and re-checked
  36. rma.venturacounty.gov, quoted and re-checked
  37. New Onsite Wastewater Treatment Systems Design, quoted and re-checked
  38. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  39. Ventura County Non-Coastal Zoning Ordinance, quoted and re-checked
  40. Mobilehome Park Overlay Zone and Regulations, quoted and re-checked
  41. onestoppermits.venturacounty.gov, quoted and re-checked
  42. Engineering Services Department, quoted and re-checked
  43. County Ordinances - Ventura County Resource Management Agency (2026 county census)
  44. Ventura County Non-Coastal Zoning Ordinance, quoted and re-checked
  45. Effective property tax rate: Bolthole Index county data
  46. Median property tax bill: Bolthole Index county data
  47. Temporary Rental Unit Ordinance Frequently Asked Questions, quoted and re-checked
  48. Ventura County Building Code (Current Edition), quoted and re-checked
  49. Habitat Connectivity and Wildlife Corridor FAQ, quoted and re-checked

Written October 16, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Ventura County requires a building permit for a home.

RuleVentura CountyLos Angeles CountySanta Barbara CountyKern CountySan Luis Obispo CountyOrange CountyTulare County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Env. Health Div.County Dept. of Public HealthCounty Public Health Dept.County Env. Health Div.County Planning & Building Dept.County Health Care AgencyCounty Env. Health Div.

County locator

Ventura County in California

23
County map
Ventura County highlighted among the California counties · colored by Index score

How Ventura County scores

Seclusion10100% ev.
Self-Sufficiency32100% ev.
Admin Boringness41100% ev.
Durability27100% ev.
Property Autonomy56100% ev.
Carry Cost27100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$884kTypical home
0.7%Property tax
$28,278Land / acre
20.3"Annual rain
41.2% of yrsSevere drought
2.7 / yr (+2.2)Mid-century 100°F days
123.3 daysMid-century dry spell
2.6" (+3.7%)Mid-century 1-day rain
1.1×Wildfire change factor
100%Forward climate coverage
$1,643Home insurance / yr
5.2% / yrInsurance growth
1.48%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
5,914,237People within 2 hr
548,952Radius comparison (15 mi)
450.7People / sq mi
52%Federal land
32.6%Land at 15% slope or less
11.1%Soils rated "not limited" for septic (strict USDA rating)
121,851 acWorkable land screen
51.4%Wooded land
12.3 tonsBiomass / forest ac
58.4°FAvg temp

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Cities and towns in Ventura County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Oxnard · San Buenaventura (Ventura) · Santa Paula

Answers from the rulebook for Ventura County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Ventura County rules

  • Building permitRequired

    Buildings and structures in unincorporated Ventura County subject to County Building and Safety jurisdiction.

    • Generally required before commencing construction.
    • Exceptions include public schools, hospitals, and water and electric utility infrastructure overseen by the State of California or other agencies.
    • Public Works projects constructed in the public right of way, such as road bridges and roadways, are exempt.
    • Some small projects and minor improvements on private property, including small storage sheds, flooring, and most finish work in residential buildings, are exempt.
    • Incorporated cities in Ventura County issue permits within their city limits.
    “Generally, all buildings and structures require a building permit from Building and Safety prior to commencing construction.”
    One more reviewed finding on this topic
    • Required — Buildings and structures in unincorporated Ventura County under the jurisdiction of Ventura County Building and Safety.
      “Generally, all buildings and structures require a building permit from Building and Safety prior to commencing construction.”
  • Owner-builder exemptionConditional

    Owner-builders applying for building permits administered by Ventura County Building and Safety.

    • The permit is taken out in the owner's name.
    • An owner-builder may personally perform construction work or act as general contractor and hire California-licensed subcontractors.
    • The County handout warns that hiring unlicensed contractors creates serious financial risk.
    • The County requires verification of the property owner's acknowledgment and approval to assume liability through the Notice to Property Owner before issuing an owner-builder permit.
    • The County also requires verification of the property owner's identification and signature and, if applicable, designation and signature on an Authorized Agent form.
    “Verify Property Owner’s Identification & Signature Verify Property Owner’s Designation & Signature on AUTHORIZED AGENT Form (if applicable)”
  • Building code adoptedAdopted (with conditions)

    Construction subject to the Ventura County Building Code in unincorporated Ventura County, including the California Building Standards Code and County-adopted amendments.

    • The current Ventura County Building Code edition is the 2025 edition.
    • The California Building Standards Code is incorporated as part of the Ventura County Building Code.
    • The County page states that the California Codes are amended with provisions for construction projects in the unincorporated areas of Ventura County.
    • The cited California Building Standards Code page describes the transition from the 2019 edition through December 31, 2022, to the 2022 California Codes for permit applications submitted after December 31, 2022; the current VCBC page identifies the current VCBC edition as 2025.

    current Ventura County Building Code edition: 2025 · California Building Standards Code: part of Ventura County Building Code

    “The following parts of the 2025 California Building Standards Code [...] are hereby made a part of the Ventura County Building Code.”
  • InspectionsRequired

    All construction or work in unincorporated Ventura County for which a building permit is required.

    • The owner or licensed contractor must notify the Building Official when work is ready for inspection.
    • Required work must remain accessible and exposed; it may not be covered or concealed without Building Official approval.
    • Inspections are conducted to verify compliance with plans, model codes, and County-agency ordinances, including zoning/planning, fire prevention, and flood control.
    • Special inspections may be required for concrete strength over 2,500 psi, concrete stem walls, shotcrete, post-tensioning, structural masonry, field welding/high-strength bolting, piling/caissons, and special cases ordered by the Building Official.

    inspection request lead time: >= 1 working day (The County webpage also states requests received before 4:00 p.m. on business days are generally conducted the next business day.)

    “The code intends that all construction or work for which a permit is required shall be subject to inspection by the Building Division.”
    One more reviewed finding on this topic
    • Required — Construction or work for which a Ventura County building permit is required.
      “The code intends that all construction or work for which a permit is required shall be subject to inspection by the Building Division.”
  • County-wide zoningPresent (with conditions)

    County zoning regulation in unincorporated Ventura County, including separate coastal and non-coastal zoning regimes.

    • The Coastal Zoning Ordinance regulates coastal areas only.
    • The Non-Coastal Zoning Ordinance covers all areas outside the Coastal Zone.
    • The two codes differ in many substantive ways.
    • The cited Non-Coastal Zoning Ordinance establishes zoning designations on all land in the unincorporated area of Ventura County.
    • The County Subdivision Ordinance separately regulates subdivisions of land.
    • The ordinance PDF identifies amendment dates of December 6, 2005, January 29, 2008, and December 17, 2024 in the quoted section.
    “A zoning designation has been established on all land in the unincorporated area of Ventura County.”
  • Local zoningVaries (with conditions)

    Aggregate local-zoning picture across Ventura County: County zoning is administered in unincorporated areas through separate coastal and non-coastal ordinances, while County planning staff expressly do not handle matters within a city.

    • The County source does not identify or enumerate each incorporated city’s zoning ordinance.
    • County zoning sources establish County administration for unincorporated areas only.
    • Coastal and non-coastal unincorporated areas are governed by different County ordinances that differ in many substantive ways.
    • The conclusion is an aggregate countywide characterization and does not claim that the County administers zoning inside incorporated cities.
    “The Planning Division implements two zoning ordinances: the Coastal Zoning Ordinance which regulates coastal areas only, and the Non-Coastal Zoning Ordinance, which covers all areas outside the Coastal Zone. The two codes are structured in parallel but differ in many substantive ways.”
  • Minimum lot sizeDistrict specific (with conditions)

    Individual legal lots in unincorporated Ventura County non-coastal zoning districts.

    • The applicable minimum depends on the zoning district and any lot-area suffix.
    • Additional lot-area exceptions are in Sections 8103-2 and 8106-1.
    • RPD minimum lot areas are established by suffix designation.

    OS-REC minimum lot area: 10 acres · OS minimum lot area: 10 acres · AE minimum lot area: 40 acres · RA minimum lot area: 1 acre · RE minimum lot area: 10,000 square feet · RO minimum lot area: 20,000 square feet · R1 minimum lot area: 6,000 square feet · R2 minimum lot area: 7,000 square feet · RHD minimum lot area: 0.80 acre

    “The following tables indicate the lot area, setback, height and building lot coverage standards which apply to individual legal lots in the zones specified.”
  • SetbacksDistrict specific (with conditions)

    Buildings, structures, vehicle parking or storage, and open storage on individual legal lots in unincorporated Ventura County non-coastal zoning districts.

    • The matrix contains zone-specific setbacks.
    • Exceptions may be found in Sections 8106-5, 8106-6, 8107-1.7, and 8107-20.
    • Flag and irregularly shaped lots are addressed in Section 8106-4.3.
    • The setback regulations apply to parking or storage of vehicles, buildings with foundations, other structures whether or not they have foundations, and open storage, except as specifically allowed.

    OS-REC front setback: 20 feet · OS-REC interior/corner side setback: 10 feet · OS-REC reverse-corner street-side setback: 20 feet · OS-REC rear setback: 15 feet · RA interior side setback: 5 feet · RA rear setback: 10 feet

    “The setback regulations apply to parking or storage of vehicles, buildings with foundations, other structures, such as those for parking and storage, whether or not they have foundations, and to open storage, except as allowed pursuant to Sections 8106-5.3, 8106-8.6, 8107-1.6, 8109-3.2(f), 8109-3.3(d), or otherwise specifically provided in this Chapter.”
  • Lot coverageDistrict specific (with conditions)

    Maximum building lot coverage for individual legal lots in unincorporated Ventura County non-coastal zoning districts and area-plan designations.

    • The ordinance states that building lot coverage depends on lot location for several zones and directs users to Section 8106-1.4.
    • Area-plan standards and exceptions apply, including nonconforming-lot formulas and exclusions.
    • Structures used for growing plants such as greenhouses, hothouses, and agricultural shade/mist structures are excluded from maximum building lot coverage on lots with an Agricultural land use designation, but structures used for preliminary packing, storage, and preservation of produce and similar structures are not included in that exclusion.

    Oak Park POS maximum building lot coverage: 5 percent · Oak Park R/1-2 maximum building lot coverage: 28 percent · Oak Park R/2-4 maximum building lot coverage: 35 percent · Oak Park R/4-6 maximum building lot coverage: 41 percent · Oak Park R/6-8 maximum building lot coverage: 48 percent · Oak Park R/8-12 maximum building lot coverage: 50 percent · Oak Park R/16-20 maximum building lot coverage: 60 percent · Oak Park C maximum building lot coverage: 60 percent · Oak Park CF maximum building lot coverage: 60 percent

    “Structures used for growing plants such as greenhouses, hothouses, and agricultural shade/mist structures shall be excluded from the maximum building lot coverage standards applicable to lots with an Agricultural land use designation. This exclusion does not include structures used for preliminary packing, storage and preservation of produce and similar structures.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Maximum building lot coverage in unincorporated Ventura County.
      “The maximum percentage of building lot coverage for lots located outside of a mapped existing community designated area boundary, and not subject to an area plan, shall be as specified in the General Plan for the applicable land use designation. [...] Rural 25 [...] Agricultural 5 [...] Commercial 60”
  • Building heightDistrict specific (with conditions)

    Maximum structure height in unincorporated Ventura County zoning districts.

    • Height varies by zone and structure type.
    • For OS-REC, the table states a 25-foot principal-structure height, with an increase above 25 feet to a maximum of 35 feet if each side-yard setback is at least 15 feet or as specified by permit; the accessory-structure height is 15 feet except as provided in Section 8106-7.4.
    • Height-limit exceptions are identified in Sections 8106-5, 8106-8, and 8107-1.7.
    • Coastal-zone and incorporated-municipality rules may differ.

    OS-REC principal structure height: 25 ft (May increase to maximum 35 ft if each side-yard setback is at least 15 ft or as specified by permit) · OS-REC accessory structure height: 15 ft (Except as noted in Section 8106-7.4)

    “Height may be increased above 25 ft (to maximum 35 ft) if each side yard setback is at least 15 ft or as specified by permit. [...] 15 ft, except as noted in Section 8106-7.4.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Principal and accessory structures on individual legal lots in unincorporated Ventura County non-coastal zoning districts.
      “Height may be increased above 25 ft (to maximum 35 ft) if each side yard setback is at least 15 ft or as specified by permit.”
  • Living in an RVLimited

    Recreational vehicle parks in the unincorporated areas of Ventura County outside the Coastal Zone.

    • All applicable zoning and development standards of the Non-Coastal Zoning Ordinance apply.
    • Applicable General Plan and area-plan policies apply.
    • The stated county regulations apply unless preempted by Chapter 2 of Title 25 of the California Code of Regulations.
    • RV parks are allowed only in zones OS-REC, OS, RA, and RE with a Planning Commission-approved Conditional Use Permit.
    • The minimum park lot area is 3 acres on a single legal lot.
    • At least 60 percent of net lot area must remain natural or landscaped.
    • RV size and height must be consistent with Health and Safety Code section 18010.
    • Each RV space must be at least 1,000 square feet wide and 25 feet wide.
    • Maximum density is 18 RV spaces per net acre.
    • Setbacks and separation requirements must be consistent with Title 25, section 2330 of the California Code of Regulations.
    • RV parks must have a permanent source of potable water.
    • Drainage must discharge to a public sewer or a private sewage disposal system approved by the Ventura County Environmental Health Division.
    • Toilets, showers, and lavatories must be provided under Title 25, section 1112 of the California Code of Regulations.
    • No permanent building or structure may be attached to or constructed within a designated RV space, although portable accessory structures and fixtures are allowed.
    • Travel trailers, trailer coaches, motor homes, campers, or tents may not be offered for sale, lease, or rent within an RV park.
    • Driving, staging, or parking motor vehicles outside designated driveways and parking areas within the park is prohibited.

    maximum length of stay: 90 days (within any 120-day period) · minimum park lot area: >= 3 acres (park must be on a single legal lot) · minimum individual RV space size: >= 1000 square feet · minimum individual RV space width: >= 25 feet · maximum RV-space density: <= 18 spaces per net acre

    “d. Occupancy: The length of stay for each recreational vehicle and/or its occupants in a recreational vehicle park is limited to a maximum of 90 days within any 120-day period.”
    3 more reviewed findings on this topic
    • Temporary only (with conditions) — Use of a recreational vehicle as a temporary dwelling during construction in the unincorporated Coastal Zone of Ventura County.
      “A mobilehome or recreational vehicle may be used by the owner(s) of a lot as a temporary dwelling unit for 12 months during construction of a residence for which a building permit is in full force and effect on the same site.”
    • Temporary only (with conditions) — Occupancy of a habitable recreational vehicle as temporary housing during construction or major remodeling of a principal dwelling in unincorporated, non-coastal Ventura County.
      “A Zoning Clearance authorizing the use of a habitable recreational vehicle (RV), or an existing dwelling, as temporary housing during construction or major remodeling of a principal dwelling may be issued, subject to the following criteria and requirements:”
    • Limited — Occupancy of recreational vehicles in recreational vehicle parks in unincorporated non-coastal Ventura County.
      “The length of stay for each recreational vehicle and/or its occupants in a recreational vehicle park is limited to a maximum of 90 days within any 120-day period.”
  • Tiny homesLimited

    Recreational-vehicle-type tiny-home occupancy in recreational vehicle parks governed by Ventura County's Non-Coastal Zoning Ordinance.

    • Recreational vehicle parks are allowed only in the OS-REC, OS, RA, and RE zones with a Planning Commission-approved Conditional Use Permit.
    • The minimum lot area for a recreational vehicle park is 3 acres on a single legal lot.
    • At least 60 percent of the net lot area must remain in its natural state or landscaped.
    • The maximum recreational vehicle size and height must comply with California Health and Safety Code section 18010.
    • The minimum individual recreational vehicle space size is 1,000 square feet and the minimum width is 25 feet.
    • Occupancy is limited to a maximum stay of 90 days within any 120-day period.
    • County zoning and development standards apply unless preempted by Chapter 2 of Title 25 of the California Code of Regulations.

    minimum recreational vehicle park lot area: >= 3 acres (The park shall be on a single legal lot.) · minimum natural or landscaped net lot area: >= 60 percent · minimum individual recreational vehicle space size: >= 1000 square feet · minimum individual recreational vehicle space width: >= 25 feet · maximum occupancy stay: <= 90 days per 120-day period

    “Occupancy: The length of stay for each recreational vehicle and/or its occupants in a recreational vehicle park is limited to a maximum of 90 days within any 120-day period.”
    One more reviewed finding on this topic
    • Limited — Tiny-home-like recreational vehicles, travel trailers, truck campers, camping trailers, and motorhomes occupying recreational vehicle parks in non-coastal unincorporated Ventura County.
      “limited to a maximum of 90 days within any 120-day period.”
  • Manufactured homesAllowed (with conditions)

    Manufactured homes used as dwellings in mobilehome parks in unincorporated Ventura County.

    • A mobilehome park is land where two or more spaces are rented or leased for mobilehomes or manufactured homes to be used as dwellings.
    • The Mobilehome Park Overlay Zone applies to mobilehome parks in the unincorporated area.
    • Only authorized uses with appropriate permits are allowed in the overlay zone; the principal use is a mobilehome park.
    • Applicable base-zone, zoning, development, building, and state Title 25 requirements still apply.
    “Mobilehome Park — An area of land where two or more spaces are rented or leased for mobilehomes or manufactured homes to be used as dwellings.”
    One more reviewed finding on this topic
    • Limited — A manufactured home used as an accessory dwelling unit in the non-coastal unincorporated area of Ventura County.
      “An accessory dwelling unit also includes the following: (a) An efficiency unit, as defined in section 17958.1 of the Health and Safety Code, and (b) A manufactured home, as defined in section 18007 of the Health and Safety Code.”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units and junior accessory dwelling units in non-coastal unincorporated Ventura County.

    • The 2024 County ADU/JADU regulations were adopted June 4, 2024 and became effective July 3, 2024.
    • ADUs meeting state ADU law and all JADUs may proceed directly with a Building Permit; additional attached and larger detached ADUs may be allowed with a Zoning Clearance.
    • Applicable zoning designations and dimensional, building, fire, sanitation, and other ordinance standards must be met.
    • The County's coastal ADU treatment remains subject to the existing Coastal Zoning Ordinance and applicable state standards until Coastal Commission certification of amendments.

    JADU maximum size: <= 500 square feet (must be contained entirely within an existing or proposed single-family dwelling) · new detached ADU maximum size under NCZO Section 8107-1.7.4(b): <= 850 square feet (subject to the listed zoning and setback requirements)

    “ADUs which meet State ADU law; as well as all JADUs are allowed directly with a Building Permit (Section A below).”
  • Who permits septicCounty (with conditions)

    Onsite wastewater treatment systems in unincorporated Ventura County.

    • The County Environmental Health Division does not have jurisdiction within incorporated city limits; the appropriate city building department must be contacted.
    • The Division does not have jurisdiction for OWTS serving mobile home parks; the California Department of Housing and Community Development Southern Area Office is identified instead.
    “The Division is the authority with jurisdiction for OWTS in unincorporated Ventura County only.”
  • Septic permitRequired

    Installation of a new OWTS and repair of damaged or deteriorated OWTS components in unincorporated Ventura County.

    • For a new OWTS, the design must first be approved.
    • The source states that the permit requirement applies to all OWTS construction permits and requires the associated application materials and legal declaration packet.
    • City limits and mobile home parks are outside the County Environmental Health Division's stated jurisdiction.
    “prior to the installation of a new OWTS [...] prior to the repair of damaged or deteriorated OWTS components.”
  • Septic inspectionRequired

    New OWTS construction and repairs of existing OWTS in unincorporated Ventura County.

    • Liquid Waste Program staff inspect new OWTS construction and repairs for conformance with applicable codes.
    • An inspection appointment is scheduled through the OWTS Inspection Hotline at (805) 477-7136.
    • The source states that appointments may take up to two business days to schedule.
    “inspect both new OWTS construction and repairs of existing systems”
  • Off-grid sanitationLimited

    Use of an OWTS as an onsite sanitation method for structures without access to a public sewer or wastewater treatment utility in unincorporated Ventura County.

    • A new OWTS must undergo individual, site-specific evaluation before a Permit to Construct is issued.
    • A conventional OWTS cannot be used where an available public sewer utility line is within 200 feet.
    • An alternative OWTS cannot be used where an available public sewer utility line is within one-half mile.
    • Design and construction must comply with applicable County requirements and approvals.
    “An onsite wastewater treatment system (OWTS), also referred to as a septic system, is used for the disposal of wastewater from structures that do not have access to a public sewer/wastewater treatment utility. The Environmental Health Division (Division) Liquid Waste Program is tasked with protecting public health and the environment from the potential adverse health and environmental impacts associated with OWTS.”
  • Well permitLimited

    New water wells in unincorporated Ventura County, subject to affected-basin status and any remaining local moratoria enacted by cities or Groundwater Sustainability Agencies.

    • The County moratorium on new well permits was lifted in the unincorporated area for each affected basin after that basin's Groundwater Sustainability Agency adopted and submitted a Groundwater Sustainability Plan to the California Department of Water Resources.
    • As of January 31, 2022, the requirement had been met for all high- and medium-priority basins in Ventura County.
    • Local well-permit moratorium ordinances passed by cities and Groundwater Sustainability Agencies may still be in effect.
    • Prospective applicants are directed to contact the Ventura County Public Works Agency before beginning the formal permitting process to determine whether the project falls within a remaining restricted area.

    date the county page states all high- and medium-priority basins met the requirement: 2022-01-31

    “The moratorium on new well permits [...] was lifted in the unincorporated area [...] Local well permit moratorium ordinances [...] may still be in effect.”
  • Mandatory utility hookupSewer (with conditions)

    A home or business requiring an alternative OWTS in unincorporated Ventura County.

    • Connection to public sewer is required when an available public sewer utility line is within one-half mile.
    • The source lists currently approved alternative systems as mound systems, subsurface sand filtration systems, and OWTS requiring supplemental treatment units for nitrogen and pathogen reduction.

    available public sewer utility line distance: <= 1/2 mile (Alternative OWTS)

    “within ½ mile of an available public sewer utility line”
    One more reviewed finding on this topic
    • Sewer (with conditions) — A home or business requiring a conventional OWTS in unincorporated Ventura County.
      “within 200 feet of an available public sewer utility line”
  • Agricultural exemptionConditional

    Agricultural sheds and specified agricultural structures in unincorporated Ventura County under the current 2025 Ventura County Building Code.

    • One-story detached non-residential and agricultural sheds are exempt only when the floor area does not exceed 120 square feet and they are constructed more than 60 feet from other non-residential buildings larger than 6,000 square feet on the same parcel.
    • Readily removable plastic-covered agricultural hoop structures are exempt only when they have no in-ground footings or foundations and are not more than 12 feet high.
    • Agricultural wind generating machines are listed as exempted work.
    • Detached one-story animal shade covers are exempt only when open on all sides, no more than 12 feet high above grade, and no more than 1,000 square feet of roof area.
    • Shade-cloth structures for nursery or agricultural purposes are exempt, but service systems are excluded.
    • The code applies within all unincorporated territory of Ventura County.
    • Exemption from a building permit does not eliminate other zoning, fire, health, environmental, or utility requirements.

    agricultural shed floor area: <= 120 sq. ft. · distance from larger non-residential building: > 60 ft. (larger than 6,000 square feet and on the same parcel) · agricultural hoop structure height: <= 12 ft. (readily removable plastic-covered structure without in-ground footings or foundations) · animal shade-cover height: <= 12 ft. (detached, one-story, open on all sides) · animal shade-cover roof area: <= 1000 sq. ft. (detached, one-story, open on all sides)

    “agricultural sheds, provided the floor area does not exceed 120 square feet and are constructed further than 60 feet away from other non-residential buildings”
    One more reviewed finding on this topic
    • Conditional — Agricultural activities and structures within Ventura County Habitat Connectivity and Wildlife Corridor regulation areas in the non-coastal area.
      “Most agricultural activities and structures are exempt from the proposed regulations.”
  • Subdividing landRegulated (with conditions)

    Proposed subdivisions of land wholly or partially located within unincorporated Ventura County, including tentative parcel and final maps, reversions to acreage, parcel-map waivers, and mergers.

    • Projects must comply with the State Subdivision Map Act and Ventura County Subdivision Ordinance.
    • Most subdivisions require discretionary review and approval; exemptions from discretionary review are identified in Section 8201-4.
    • For five or more residential lots, a tract-map application is required and applicants must meet minimum lot-size and land-use requirements.
    “All proposed subdivisions of land, which include but are not limited to tentative parcel and tentative final maps, reversions to acreage, parcel map waivers, or mergers of land wholly or partially located within unincorporated Ventura County, must abide by the State Subdivision Map Act and the Ventura County Subdivision Ordinance.”
  • Building in a floodplainRequired

    Habitable and non-habitable structure construction in a FEMA-designated 1% annual-chance floodplain in unincorporated Ventura County.

    • A Floodplain Development Permit application is required for covered construction.
    • New construction in a designated FEMA floodplain is regulated by the Ventura County Floodplain Management Ordinance and the Ventura County Building Code Appendix J.
    • Engineering Services handles floodplain review and permits; requirements may vary by project.

    floodplain probability: 1% annual chance

    “Floodplain Development Permit applications are required by the Land Development Services Division for habitable and non-habitable structure construction in a FEMA designated 1% annual chance floodplain.”
  • Short-term rentalsProhibited

    Short-term rentals within the Ojai TRU Regulation Overlay Zone in the unincorporated Non-Coastal Zone.

    • The prohibition has an exception for dwellings classified as historic landmarks as of June 19, 2018.
    • Horeshareshare operation is separately allowed with a legal permit from Ventura County Code Compliance Division.
    • The Ojai TRU Regulation Overlay Zone also establishes ownership, permit, occupancy, parking, noise, event, and inspection/compliance requirements.

    historic-landmark exception date: June 19, 2018

    “SHORT-TERM RENTALS are not permitted to operate unless the dwelling is classified as a historic landmark as of June 19, 2018.”
    One more reviewed finding on this topic
    • Prohibited — Short-term rentals in the Non-Coastal Zone Ojai Temporary Rental Unit Regulation Overlay Zone.
      “For the Non-Coastal Zone, within the Ojai TRU Regulation Overlay Zone, SHORT-TERM RENTALS are not permitted to operate unless the dwelling is classified as a historic landmark as of June 19, 2018. HOMESHARES are allowed to operate provided that they have a legal permit issued by the Ventura County Code Compliance Division.”
  • Permit feesVariable (with conditions)

    Building and Safety permit fees for projects in unincorporated Ventura County.

    • Fee amounts vary by the size, scope, and value of the construction project.
    • Exact fees are calculated by Building and Safety during the permitting process.
    • Application and plan-review fees may be collected when the application is received; most building permit fees are due when the permit is issued.
    • Additional fees may apply for other agencies, special districts, flood zones, hazardous fire areas, or other project-specific conditions.
    “Fee amounts vary and are calculated based on the size, scope, and value of a construction project. Exact fee amounts are calculated by B&S during the permitting process.”

California rules that apply here

  • Certificate of occupancyRequired

    Completed construction projects within HCAI jurisdiction involving California health facilities.

    • The HCAI Compliance Officer issues the project-completion Substantial Compliance or Certificate of Occupancy once required conditions are met.
    • The stated examples include delivery of all test reports to the Inspector of Record, clearance of outstanding items, and completion of the Testing, Inspection and Observation Program.
    • Once construction is completed, the certificate of occupancy allows the owner to apply to the Department of Health Services for a license to operate the health facility.
    “Issues the certificate of occupancy and/or construction final.”
  • Zoning districtsPartial

    California city and county zoning codes and the zoning districts established by those local jurisdictions.

    • The city or county zoning code implements general-plan policies at the individual-parcel level.
    • Local zoning codes identify allowed land uses in the jurisdiction’s zoning districts.
    • Since 1971, state law requires city or county zoning codes to be consistent with the jurisdiction’s general plan, except in charter cities.
    • The source does not publish a statewide list of parcel-specific zoning districts; the applicable local jurisdiction must be consulted.
    “The zoning code presents standards for different land uses and identifies which land uses [...] are allowed in the various zoning districts of the jurisdiction.”
  • Minimum dwelling sizeSpecified

    Efficiency dwelling units and efficiency-unit ADUs in Ventura County, including units in unincorporated areas, subject to California building standards and any applicable local ordinance.

    • The ordinary efficiency dwelling-unit definition requires at least 190 square feet of living space plus a separate closet, kitchen sink, cooking appliance, refrigerator, and separate bathroom containing a water closet, lavatory, bathtub, or shower.
    • California Health and Safety Code § 17958.1 permits a city, county, or city and county to adopt an ordinance allowing an efficiency unit for no more than two persons with a minimum floor area of 150 square feet and partial kitchen or bathroom facilities, as specified by that ordinance.
    • Ventura County’s Non-Coastal Zoning Ordinance defines an ADU to include an efficiency unit by reference to Health and Safety Code § 17958.1; the reviewed county materials did not establish that Ventura County has adopted a separate 150-square-foot efficiency-unit ordinance.
    • Other building, fire, health, septic, zoning, and permitting requirements remain applicable.

    ordinary efficiency dwelling-unit minimum living space: >= 190 square feet (Requires separate closet, kitchen sink, cooking appliance, refrigerator, and separate bathroom.) · statutory local-ordinance efficiency-unit minimum: >= 150 square feet (Only for occupancy by no more than two persons and only when authorized by a city, county, or city and county ordinance; partial kitchen or bathroom facilities may be specified by that ordinance.)

    “An efficiency unit may be as small as 150 square feet in floor area (HSC, § 17958.1).”
    One more reviewed finding on this topic
    • Specified — Efficiency units permitted by a California city, county, or city and county.
      “Notwithstanding Sections 17922, 17958, and 17958.5, a city, county, or city and county may, by ordinance, permit efficiency units for occupancy by no more than two persons which have a minimum floor area of 150 square feet and which may also have partial kitchen or bathroom facilities, as specified by the ordinance.”
  • Camping on your landLimited

    Camping in units operated by the California Department of Parks and Recreation statewide.

    • Camping is confined to areas designated for that purpose.
    • Occupancy by the same persons, equipment, or vehicles is generally limited to 30 days in any calendar year in that unit.
    • The Department may establish shorter or longer occupancy limits.
    • When a shorter seasonal limit applies, the camper must vacate the campsite and may not reregister in the unit until 48 hours have expired, measured from 12:00 noon on the checkout day to 12:00 noon on the second day following.
    • A district superintendent may permit one-night camping in a day-use area or portion of one, subject to Department-established fees and vehicle limitations; occupants must vacate by 9:00 a.m. the following morning.
    • California State Parks' current reservation policy states that each campground has a consecutive-night limit, requires a 48-hour absence after that limit, and generally has a 30-night annual maximum, subject to individual park policies.

    general annual occupancy limit: 30 days per calendar year per unit (The Department may establish shorter or longer limits of occupancy.) · return interval after shorter seasonal limit: 48 hours (Measured from 12:00 noon of the checkout day to 12:00 noon of the second day following.) · one-night camping in day-use area: 1 night (Only if permitted by the district superintendent; occupants must vacate by 9:00 a.m. the following morning.)

    “Occupancy by the same persons, equipment, or vehicles of any camping facility is limited to a total of 30 days in any calendar year in that unit.”
    One more reviewed finding on this topic
    • Allowed (with conditions) — Temporary camping in California special occupancy parks, including parks containing recreational vehicles, tents, or camping cabins.
      ““Special occupancy park” means a recreational vehicle park, temporary recreational vehicle park, incidental camping area, or tent camp.”
  • Driveway accessRequired

    Driveways and driveway connections involving proposed encroachments within, under, or over State highway rights of way.

    • The requirement applies to proposed activities related to placement of encroachments within, under, or over State highway rights of way.
    • Applications are submitted to the appropriate District Encroachment Permits Office having jurisdictional authority over the site.
    • Local or other agency requirements may also apply outside State highway rights of way.
    “An encroachment permit must be obtained for all proposed activities related to the placement of encroachments within, under, or over the State highway rights of way.”
  • Permit processPublished (with conditions)

    Construction, alteration, repair, movement, improvement, removal, conversion, or demolition of a building or structure in California.

    • A separate permit for each building or structure must be obtained from the building official before the work.
    • Code requirements vary by city and county; the applicable local building department must be consulted.
    “no building or structure may be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted or demolished unless a separate permit [...] has first been obtained”
  • Campground & park staysLimited

    Occupancy and use of manufactured homes and mobilehomes in California mobilehome parks and other locations subject to HCD jurisdiction.

    • HCD administers titling and registration for manufactured homes and mobilehomes.
    • HCD-inspected mobilehome parks are subject to health and safety enforcement where local government has not assumed enforcement.
    • Manufactured/mobilehome park regulations address construction, use, maintenance, and occupancy.
    • Separate local land-use, building, fire, health, and utility requirements may apply.
    “MHs may be occupied outside or inside of mobilehome parks and installation and approval for occupancy is governed by the Mobilehome Parks Act (MPA), HSC Sections 18200, et seq., and Title 25, CCR Sections 1000, et seq.”
    One more reviewed finding on this topic
    • Limited — Occupancy and use of recreational vehicles in California special occupancy parks and designated RV sections of mobilehome parks.
      “Unless otherwise allowed by a local ordinance, RVs generally may be occupied only in mobilehome parks or special occupancy parks governed by the Mobilehome Parks Act”
  • county zoning authorityGeneral

    California county legislative bodies' authority to adopt zoning ordinances regulating buildings, structures, land uses, lots, yards, open space, lot coverage, intensity of use, parking, loading, and setbacks within county jurisdiction, including unincorporated areas.

    • The authority is exercised pursuant to Government Code Chapter 4, Zoning Regulations.
    • The statute separately authorizes city legislative bodies; incorporated municipalities may exercise their own zoning authority.
    • Government Code Section 65850 also lists authority to regulate signs and billboards, building and structure location, height, bulk, number of stories, and size, lot and open-space size and use, lot coverage, intensity of land use, offstreet parking and loading, and building setback lines.
    • The cited section states it was amended by Stats. 2017, Ch. 376, Sec. 1, effective January 1, 2018.
    “The legislative body of any county or city may, pursuant to this chapter, adopt ordinances that do any of the following:”
  • county building authorityGeneral

    California counties administering and enforcing state building standards through county building departments, including residential construction in unincorporated areas.

    • Each county must maintain building standards and state building regulations in the office of the building official responsible for administration and enforcement of state building standards.
    • The statewide Title 24 standards apply subject to statutory exceptions and any authorized local amendments or local requirements.
    • The cited HCD bulletin concerns the 2019 California Building Standards Code and its July 1, 2021 supplement; later code editions may supersede those particular edition dates.
    “These codes shall be maintained in the office of the building official responsible for the administration and enforcement of state building standards”

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Water rights & wells in Ventura County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from California’s water agency.

Adjudicated — rights fixed

Water rights here have been fixed by a court. New supply effectively means acquiring an existing right.

Household wellPermit required — restricted

California requires no STATE permit for a domestic well — wells are permitted by the county — but under SGMA a Groundwater Sustainability Agency can meter or restrict new wells in medium/high-priority and critically overdrafted basins, and Executive Order N-7-22 requires counties in those basins to get GSA verification that a new well is consistent with the Groundwater Sustainability Plan before permitting.

Limit: 2 acre-feet/year de minimis under SGMA (Water Code §10721(e)) — largely exempt from GSA metering/fees

California DWR / State Water Board — SGMA de minimis & EO N-7-22 Action 9 FAQ ↗

Hybrid state (appropriation + riparian). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the California state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Ventura County, California

Is Ventura County a good place to live off-grid or homestead?

Ventura County scores 23/100 on the Bolthole Index, a weak county profile. Watch-outs: about 548,952 people within 15 miles and higher long-term carry cost.

Do you need a building permit in Ventura County, California?

Ventura County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Ventura County Environmental Health Division. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Ventura County?

Living in an RV on your own land in Ventura County is allowed on a temporary basis only: Use of a recreational vehicle as a temporary dwelling during construction in the unincorporated Coastal Zone of Ventura County. The owner(s) must be constructing a residence on the same site. A building permit for the residence must be in full force and effect. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Ventura County, California?

Land in Ventura County runs about $28,278 per acre, based on the latest county data.

What is the water situation in Ventura County?

Ventura County gets about 20.3" of rain a year, with severe drought in roughly 41.2% of years. On water rights, Ventura County lies in the Santa Paula & Las Posas Valley Basins — Adjudicated — Santa Paula (adj. 1996) and Las Posas Valley (Fox Canyon GMA, adjudication judgment in the early 2020s) under watermasters; new appropriation effectively closed..

How remote is Ventura County?

A typical private-land location has about 548,952 people within 15 miles and 20,133,754 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Ventura compares in California

Compare side-by-side →See all 58 California counties ranked →