Bolthole Index

Ventura County, California

Building permits, zoning and septic rules in Ojai, California

Ojai, California requires a building permit for construction inside city limits, and the City of Ojai sets its own zoning through Title 10 of its municipal code12. Ventura County Environmental Health says its septic authority covers unincorporated Ventura County only3, and we could not confirm who permits septic systems inside Ojai, so ask the city's Community Development Department.

At a glance

Building permit
Required for construction inside Ojai city limits1
Zoning
The City of Ojai runs its own zoning ordinance, with residential districts from R-O-4 to R-S24
Septic
Not County Environmental Health inside city limits; city authority not confirmed3
Tiny homes
Moveable tiny houses are allowed on residential lots under city code section 10-2.17125
Accessory dwellings
Allowed, approved ministerially when they meet the city's standards6
RV living
Not confirmed in city code; state rules generally limit RV occupancy to parks unless a local ordinance allows more7

Who to call

Building permits

City of Ojai Community Development Department

Zoning clearances and building permit submittals inside Ojai city limits

(805) 646-5581

401 S. Ventura Street, Ojai CA 93023

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

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

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Do you need a building permit in Ojai, California?

Yes. Construction of a building or structure inside Ojai city limits proceeds only under a building permit, and starting work first brings a fee equal to the permit fee on top of the regular fees1. A permit that expires before final inspection must be replaced by a new one under current rules and fees1.

Ojai has adopted parts of the 2025 California Building Code and Residential Code into Title 9 of its city code8. The state's 2025 Building Standards Code applies to permit applications dated on or after January 1, 20269. Permitted work is inspected during construction10.

Who issues building permits in Ojai, and how do you reach them?

Inside Ojai city limits, building permit submittals go to the City of Ojai Community Development Department at 401 S. Ventura Street, phone (805) 646-558111. The city's zoning clearance form states that the clearance is submitted together with every building permit submittal11.

Ventura County Building and Safety handles building permits for unincorporated Ventura County only, so a parcel inside Ojai does not go to the county counter12. For land outside the city, see the Ventura County page.

Does Ojai have zoning, and what does it mean for lot size, setbacks and homes?

Ojai administers its own zoning ordinance, Title 10, Chapter 2 of the municipal code, with residential districts named R-O-4, R-O-2, R-O-1, R-O-1/2, R-O, R-1, R-2, R-3 and R-S24. Rules differ by district, so look up the parcel's district first.

In the R-1 single-family district, the city's table appears to list a 10,000 square foot minimum for new parcels, 80 feet of width, 120 feet of depth and up to 4 dwelling units per acre13. The R-1 front setback is 20 feet14, and the height limit is 25 feet and 2 stories15. Confirm every figure against the city's official table before you rely on it.

A mobile home outside a park is listed as a permitted use in R-116.

How do septic permits work inside Ojai?

Ventura County Environmental Health states that it is the authority for septic systems in unincorporated Ventura County only, and that a system inside city limits belongs with the city building department3. We could not confirm from Ojai's code who issues septic permits or inspections inside the city, or whether a new home must connect to city sewer.

Before buying, ask the City of Ojai Community Development Department whether the parcel has a sewer connection or needs a septic system, and who approves it11. Outside the city, the county requires a permit for a new septic system and connection to public sewer when a line is within the stated distance17.

Can you live in an RV or tiny home in Ojai?

Ojai's code allows pre-manufactured and owner-built moveable tiny houses on residential lots under section 10-2.1712, though we did not confirm the sizing, foundation and utility standards5. Accessory dwelling units are approved ministerially by the community development director when they meet the city's standards, and a junior accessory dwelling unit is capped at 500 square feet inside an existing single-family structure6.

We could not confirm an Ojai rule on living in an RV on private land. California generally limits RV occupancy to mobilehome parks or special occupancy parks unless a local ordinance allows otherwise7. The county's temporary RV permit during construction applies to unincorporated land, not to Ojai parcels18.

Building a home in Ojai: the steps, in order

  1. Find the parcel's zoning district and confirm lot size, setbacks and height with the City of Ojai Community Development Department11.
  2. Submit a zoning clearance together with the building permit submittal11.
  3. Ask the city how wastewater is handled for the parcel, since the county says its septic authority stops at city limits3.
  4. Build only after the permit is issued, because work started early draws a fee equal to the permit fee1.
  5. Schedule inspections during construction10.

For owner-builder questions, California's contractor-license exemption does not remove permit or inspection requirements19. We could not confirm whether Ojai has a separate owner-builder process.

What stays with Ventura County, and what to check before you buy in Ojai

County-level facts still shape the purchase. Ventura County's typical home value is $883,50920, and its effective property tax rate is 0.7%21. Wells, floodplain development and driveway rules inside Ojai city limits are unconfirmed, so ask the city before assuming county rules apply11.

Land outside city limits follows different rules, including the county's septic, building and zoning offices, which are covered on the Ventura County page.

Watch-outs

  • Search results for Ojai often show Ventura County rules; those apply to unincorporated land, not to parcels inside city limits12.
  • Septic authority inside Ojai city limits is unconfirmed: Ventura County Environmental Health says its jurisdiction covers unincorporated Ventura County only, so ask the City of Ojai Community Development Department3.
  • Ojai's lot-size and setback figures come from a table that appears to list several districts side by side, so confirm the R-1 values with the city before relying on them13.

Sources

  1. Chapter 2: PERMITS - City of Ojai, CA (Ojai), quoted and re-checked
  2. Article 4: Residential Zoning Districts - City of Ojai, CA (Ojai), quoted and re-checked
  3. Septic Systems / Wastewater Disposal, quoted and re-checked
  4. Article 4: Residential Zoning Districts - City of Ojai, CA (Ojai), quoted and re-checked
  5. Article 17: Standards for Specific Land Uses - City of Ojai, CA (Ojai), quoted and re-checked
  6. Article 17: Standards for Specific Land Uses - City of Ojai, CA (Ojai), quoted and re-checked
  7. hcd.ca.gov (California statewide rule), quoted and re-checked
  8. Title 9 Chapter 1 (Uniform Codes): California Building Code and California Residential Code - City of Ojai, CA (Ojai), quoted and re-checked
  9. Approved Building Standards (California statewide rule), quoted and re-checked
  10. Chapter 2: PERMITS - City of Ojai, CA (Ojai), quoted and re-checked
  11. City of Ojai Community Development Department (ojai.ca.gov)
  12. Building Permit Information, quoted and re-checked
  13. Article 4: Residential Zoning Districts - City of Ojai, CA (Ojai), quoted and re-checked
  14. Article 4: Residential Zoning Districts - City of Ojai, CA (Ojai), quoted and re-checked
  15. Article 4: Residential Zoning Districts - City of Ojai, CA (Ojai), quoted and re-checked
  16. Article 4: Residential Zoning Districts - City of Ojai, CA (Ojai), quoted and re-checked
  17. Onsite Wastewater Treatment System (OWTS) Construction and Repair, quoted and re-checked
  18. Ventura County Non-Coastal Zoning Ordinance (9-16-2025 edition), quoted and re-checked
  19. Building Officials - Owner-Builder Overview, quoted and re-checked
  20. Typical home value (Zillow): Bolthole Index county data
  21. Effective property tax rate: Bolthole Index county data

Written October 24, 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.

Answers from the rulebook for Ojai

Ojai’s own rules

  • Building permitRequired

    Construction of a building or structure inside Ojai city limits.

    • Construction may proceed only under a building permit; if a permit expires before final inspection, a new permit is required subject to all current rules and fees.
    • Permit extensions are limited to two 180-day terms; extensions beyond one and one-half years need planning commission approval (section 9-2.9, not quoted here).
    • The permit application and fee schedule (Chapter 2, Permits) and the exemption list were not opened in full.
    “any person who commences any work on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary permits shall be subject to a fee equal to the permit fee, that shall be in addition to any required permit fees.”
  • Building code adoptedPartial

    Construction inside Ojai city limits under Title 9 (Building Regulations).

    • Verified: the 2025 California Building Code appendices I and J and the 2025 California Residential Code appendix AH are adopted as parts of the city code (section 9-1.302).
    • Section 9-1.302 was last amended by ord. 969 (12/9/2025), effective 1/8/2026, as shown in the code history.
    • The base adoption of the 2025 CBC and CRC (Chapter 1, Uniform Codes) and the 2025 California Fire Code were not verified from the opened text; a search snippet referred to a 2025 Fire Code adoption but it was not confirmed on the page.
    “the 2025 california building code appendices i and j adopted as parts of this code. the 2025 california residential code appendix ah adopted as part of this code.”
  • InspectionsRequired

    Permitted construction inside Ojai city limits.

    • The code refers to major inspections required during construction; the inspection schedule and the final inspection step are described in Chapter 2 and in the amended CBC (not fully opened).
    • Utility connection may be withheld by the Building Official until final inspection and building approval (per search snippet, not verified on the page).
    “the satisfactory completion of at least three of the five major inspections required by the uniform building code during the progress of construction”
  • Local zoningPresent (with conditions)

    Land inside Ojai city limits: the City of Ojai administers its own zoning ordinance (Title 10, Chapter 2, Zoning Regulations) with its own residential districts.

    • Use and development are governed by the district in which the parcel lies; the R-1 district is quoted here as the main single-family residential district.
    • The Article 4 page cited is the residential article of Title 10, Chapter 2; it does not on its face cover commercial or special districts.
    “the r-1 zoning district is intended for residential neighborhood areas appropriate for custom or tract-style homes, and to provide a transition to multi-family residential zones.”
  • Zoning districtsPublished (with conditions)

    Residential zoning districts inside Ojai city limits (R-O-4, R-O-2, R-O-1, R-O-1/2, R-O, R-1, R-2, R-3, R-S), as listed in the residential use table.

    • Only the residential district list was opened; commercial, manufacturing, special-purpose and overlay districts (Articles 5 to 7) were not verified.
    • The zoning map (Article 2) was not opened.
    “r-o-1/2 r-o r-1 r-2 r-3 r-s agriculture, resource & open space uses”
  • Minimum lot sizeDistrict specific (with conditions)

    New parcels in the R-1 (single-family residential, medium density) district inside Ojai city limits.

    • Column alignment: the table is flattened in the source. Four area values are listed for R-O, R-1, R-2 and R-3/R-S in that order, so the second value (10,000 sf) is read as R-1. Confirm against the official table before relying on it.
    • The R-1 width is 80 ft and the R-1 depth is 120 ft on the same table (flattened; alignment assumed the same).
    • The R-1 maximum density is four dwelling units per acre (Article 4, subsection (f)).

    minimum lot area, R-1 new parcels: 10000 sf (Table column alignment in flattened text; confirm) · minimum lot width, R-1: 80 ft (Table column alignment in flattened text; confirm) · minimum lot depth, R-1: 120 ft (Table column alignment in flattened text; confirm) · maximum density, R-1: 4 du/acre

    “r-o r-1 r-2 r-3, r-s minimum lot size (1) minimum area and dimensions for new parcels area 12,000 sf 10,000 sf 10,000 sf 9,600 sf width 100 ft 80 ft depth n/a 120 ft maximum density (2) 3 du/acre 4 du/acre 5,000 sf/du 3,000 sf/du”
  • SetbacksDistrict specific (with conditions)

    Principal structures in the R-1 (single-family residential, medium density) district inside Ojai city limits.

    • Front yard setback in R-1 is 20 ft, with a footnote that where 40% or more of lots on the same frontage and block are developed with an average front setback varying no more than six feet, no structure may project beyond that average (but not less than 20 ft in R-1).
    • Side and rear values were read from the flattened table: sides (each) listed as '12 ft for access, 5 ft. other side (10) 10 ft; 15 ft on reverse corner lot street side' and rear 25 ft. The column for R-1 specifically is not confirmed from the flattened text.
    • Setback measurement, projections and exceptions are in section 10-2.804 (not opened).
    • Reverse corner lots have a special street-side rule (footnote 9).

    front yard setback, R-1: 20 ft (Subject to footnote (8) average-setback rule; not less than 20 ft in R-1) · rear yard setback, R-1: 25 ft (Column alignment in flattened table; confirm)

    “provided that no structure shall have a front yard setback less than 25 feet within the r-o zone, and 20 feet within the r-1 zone”
  • Building heightDistrict specific (with conditions)

    Structures in the R-1 (single-family residential, medium density) district inside Ojai city limits.

    • Additional height up to 30 ft may be approved through design review under article 20 of chapter 2 (footnote 10).
    • No building in these zones may exceed the solar-access height limits in section 10-2.405 (footnote 11).
    • Height measurement and exceptions are in section 10-2.803 (not opened).

    maximum height, R-1: 25 ft (Up to 30 ft by design review (footnote 10); also 2 stories) · maximum stories, R-1: 2 stories

    “height limit (7) 25 ft, 2 stories (10)(11)”
  • Tiny homesAllowed (with conditions)

    Moveable tiny houses sited on residential lots inside Ojai city limits, under section 10-2.1712.

    • The section allows pre-manufactured moveable tiny houses and owner-built moveable tiny houses on residential lots, and allows lease of foundations or pads.
    • The minimum standards in section 10-2.1712 (sizing, foundation, utilities, districts, permits) were not read beyond the purpose clause.
    “(3) allow for pre-manufactured moveable tiny houses to be sited and developed on residential lots;”
  • Manufactured homesAllowed

    A mobile home placed on a single-family lot outside a mobile home park in the R-1 district inside Ojai city limits.

    • The Table 2-2 'p' (permitted use) mark appears in the sixth residential column, which is read as R-1 (header order r-o-4 through r-s).
    • Use is listed as permitted (p) without a conditional use permit; design and placement standards in the code were not checked.
    • Definitions of 'manufactured home' (Health and Safety Code section 18007) are cited in section 10-2.1709 but the placement rules for a manufactured home on a lot were not opened.
    “mobile home outside of a park — — — — — p — — —”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units (ADUs) on residential parcels inside Ojai city limits, under section 10-2.1709.

    • Section 10-2.1709 sets minimum standards for new ADUs and for legalizing unpermitted ADUs; only the purpose clause and definitions were read, not the full standards.
    • A junior accessory dwelling unit is defined as no more than 500 square feet, contained entirely within an existing single-family structure.
    • Primary unit must be an existing single-family dwelling in an R zone, OS, A, VMU, C-1 or B-P zone (definition read from section 10-2.1709).

    junior ADU maximum size: <= 500 sf (Junior ADU only, within existing single-family structure)

    “an application for a new or expanded accessory dwelling unit shall be approved ministerially by the community development director, without discretionary review and a hearing, if the project conforms with the minimum standards and design criteria in this section.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Ojai or Ventura County directly.

  • Owner-builder exemption — Owner-builder permits inside Ojai city limits.
  • Certificate of occupancy — Occupancy approval for new dwellings inside Ojai city limits.
  • Minimum dwelling size — Minimum dwelling size inside Ojai city limits.
  • Living in an RV — Living in an RV on private land inside Ojai city limits.
  • Camping on your land — Temporary camping on private land inside Ojai city limits.
13 more unanswered
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit fees
  • Permit process

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.

Unanswered questions are usually a sign that Ojai publishes no rule on the point, not that none exists. Ventura County’s page lists the county offices to call.

← All of Ventura County: county rules, score and offices