Bolthole Index

Riverside County, California

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

6Index Score / 100
#58 of 58 in California

Unincorporated Riverside County, California requires a building permit before construction or placement of a building or structure12. County zoning also assigns unincorporated parcels to mapped districts with their own use and development standards3. Owner-builders are allowed, while septic systems and water wells go through the county's Department of Environmental Health456.

At a glance

Building permit
Required for construction in unincorporated Riverside County, through the Department of Building and Safety1
Zoning
County zoning applies in unincorporated areas; incorporated cities administer their own land-use rules7
Septic
A county OWTS Construction Application is required to install, repair or modify a system in unincorporated areas8
Water wells
A county Environmental Health permit is required to construct, reconstruct or destroy any well, countywide6
Owner-builder
Allowed - you can be the permit holder of record instead of hiring a licensed general contractor4
Accessory dwelling unit
Allowed by right on eligible lots with a proposed or existing primary residence, subject to zoning and health and safety requirements9
RV / tiny home living
RV parking does not authorize occupancy; qualifying tiny homes may be occupied year-round in specified zones1011
Soils for a conventional septic field
Only about 13% of the county's soil has no severe limits for a standard drain field12

Who to call

Building permits

Riverside County Department of Building and Safety

Building permits, plan review and inspections for construction in unincorporated Riverside County

951-955-1800

4080 Lemon St, 9th Floor, Riverside, CA 92502

Online permits →

Zoning

Riverside County Planning Department

Zoning-district lookups, General Plan and zoning-ordinance administration, and the Short-Term Rental program for unincorporated Riverside County

(951) 955-3200

4080 Lemon Street, Riverside, CA 92501

Online permits →

Septic permits

Riverside County Department of Environmental Health - Land Use Program (Downtown Riverside Office)

Onsite wastewater (septic/OWTS) system review and approval, and water-well construction/reconstruction/destruction permits, for unincorporated Riverside County

(951) 955-8980

4080 Lemon St, 10th Floor, Riverside, CA 92501

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in Riverside 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 Riverside County, California?

In unincorporated Riverside County, the Department of Building and Safety requires a permit before you build, place, alter, repair, move or demolish a building or structure, or touch a regulated electrical, gas, mechanical or plumbing system12. Plans have to meet the 2025 California Building, Residential, Mechanical, Plumbing, Electrical, Energy and Green Codes as modified by the state, which took effect January 1, 202613. A narrow grading exemption is available for qualifying commercial agricultural work, but it requires a certificate before work begins and does not cover grading connected with a building or structure14. Once work is done, you also need an approved final inspection and a certificate of occupancy before you can use or occupy the building1516.

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

Riverside County Building and Safety is at 4080 Lemon St, 9th Floor, in Riverside, phone 951-955-1800; the Permit Assistance Center accepts walk-ins and appointments17. All county building-permit application types are accepted through PLUS Online at rivcoplus.org18. A single-family detached dwelling permit has a $6,472.45 deposit, with the final cost calculated at application; extending an active permit before expiration costs $10019. Riverside, Moreno Valley, Menifee, Jurupa Valley and Lake Elsinore issue their own building permits2021222324. County Environmental Health handles septic approvals in unincorporated areas and contracted cities, and well permits countywide86.

Does Riverside County have zoning?

Riverside County zoning applies to unincorporated parcels; give Planning the Assessor's Parcel Number to identify the district and applicable development standards2526. Ordinary dwellings need at least 750 square feet of living area, excluding porches, garages and patios, unless the zoning map requires more; qualifying tiny homes have separate standards2711. Lot minimums include 7,200 square feet in R-2 excluding access-only area, generally 20,000 square feet in A-2, and generally one-half acre in R-R282930. Riverside, Moreno Valley, Corona, Menifee, Murrieta, Temecula, Jurupa Valley, Indio, Eastvale, Beaumont and San Jacinto administer their own zoning3132333435363738394041. County Environmental Health handles well permits countywide and septic approvals in unincorporated areas and contracted cities, including Temecula6842.

What setbacks and building heights apply in Riverside County?

In unincorporated Riverside County's A-2 Heavy Agriculture zone, minimum yards are 20 feet front and 10 feet side and rear; one-family residences may reach 40 feet, while other buildings and structures generally have a 50-foot ceiling, with greater heights requiring additional approval4344. R-2 requires a 20-foot front yard measured from the nearer existing or planned future street line, a 10-foot rear yard, and interior or through-lot side yards of 10% of lot width, at least 3 feet and no more than 5 feet required; corner lots have separate rules45. R-1 dwelling coverage is limited to 50%, R-2 building coverage to 60%, and both districts generally limit height to 3 stories and 40 feet46474849. R-7 has no maximum lot coverage and a general 75-foot height ceiling, but qualifying tiny homes are limited to 25 feet505111. Residential subdivisions with minimum lots of one-half acre or less in specified residential zones and General Plan designations also face design standards, subject to exceptions; ask Planning which standards govern the parcel before drawing a building footprint5253.

How do septic permits and water wells work in Riverside County?

The Department of Environmental Health's Land Use program permits onsite wastewater treatment systems (OWTS) in unincorporated Riverside County554. Installing, repairing or modifying a septic system requires an OWTS Construction Application; a new system also requires a local building permit, a percolation report, detailed plans signed by a county-registered professional, a floor plan and proof of water service8. The county will not process an OWTS where connection to sanitary sewer is practical, and every OWTS needs construction inspection and final approval before use55. Only about 13% of Riverside County's soil has no severe limits for a conventional drain field, so test the site before assuming a standard system will work12. Cesspools are prohibited, while holding tanks are temporary and tightly limited5657. The same department permits well construction, reconstruction or destruction countywide658.

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

Personal RV parking on unincorporated Riverside County property is allowed subject to private CC&Rs, but parking does not authorize residential occupancy10. In authorized Riverside County RV parks, stays beyond 30 consecutive days or 120 days per calendar year require an RV capable of connecting to approved water and sewer service; extended or permanent occupancy permits are limited to qualifying existing parks approved before January 1, 198759. We could not confirm a general allowance for RV living on an ordinary private parcel; ask Planning before relying on one53. Qualifying tiny homes allow permanent year-round occupancy by right in R-7, MU and zones permitting one-family dwellings or ADUs, subject to required approvals and water, sewage and health constraints11. A qualifying tiny home requires a concrete slab foundation, a lot of at least 1,500 square feet, a maximum area of 500 square feet excluding patios, porches and garages, height no greater than 25 feet, and side and rear setbacks of at least 5 feet11. ADUs are allowed by right on eligible lots with a proposed or existing primary residence, subject to zoning, development standards and health and safety requirements; mobile or fabricated homes may serve as single-family dwellings in zones permitting that use, subject to applicable conditions960.

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

  1. Give Planning the parcel number and confirm zoning, allowed use, lot size, dwelling size, setbacks, coverage and height before designing272653.
  2. For a land division, follow the Subdivision Map Act and County Ordinance No. 460; after submitting a tentative map, grading and construction must wait for approval61.
  3. If you're building it yourself, complete the owner-builder application and notice; the county won't issue the building permit until the signed notice is on file462.
  4. Apply through PLUS Online and budget for the deposit due at submittal1819.
  5. For septic, submit the OWTS application, percolation report, professional plans and water-service documentation; obtain a separate permit for well work8658.

What to check before you buy land in Riverside County

Before buying unincorporated Riverside County land, settle septic feasibility and the water source: only about 13% of county soils have no severe limits for a conventional drain field, and new OWTS applications require water-service documentation128. Confirm parcel zoning and setbacks with Planning, and verify any advertised land split complies with the Subdivision Map Act and County Ordinance No. 4602661. An unlawful land division can block development approvals unless the Planning Director makes the required health, welfare and safety determination; ask Planning about a Certificate of Compliance before buying a questionable split63. Designated floodway development requires an approved plan showing no increase in base-flood levels64. The effective property tax rate is about 0.8%, with a median annual bill near $4,1896566. If rental income is part of the purchase plan, unincorporated Riverside County requires a separate, annually renewed Short-Term Rental Certificate for each property before advertising or operating a short-term rental67.

Watch-outs

  • Riverside County's zoning limits depend on the district and project type; the general R-7 height ceiling does not replace the lower tiny-home limit5111.
  • Parking a personal RV on unincorporated property is allowed, but that does not authorize living in it; ask the Planning Department before assuming residential occupancy or private-land camping is allowed1053.
  • Riverside County's short-term rental program announces updated fees effective October 25, 2026; confirm the amount with Planning before applying6753.
  • Off-grid sanitation still needs county approval: cesspools are prohibited, and holding tanks are only a temporary, tightly controlled option5657.

Sources

  1. Code & Ordinance Requirements | Building and Safety Riverside County TLMA (2026 county census)
  2. Code & Ordinance Requirements | Building and Safety Riverside County TLMA, quoted and re-checked
  3. Ordinance No. 348.4997 — Riverside County Land Use Ordinance (2026 county census)
  4. County of Riverside Building Permit Application (2026 county census)
  5. Ordinances | Riverside County Department of Environmental Health (2026 county census)
  6. Wells | Riverside County Department of Environmental Health, quoted and re-checked
  7. Ordinance No. 348.4997 — Riverside County Land Use Ordinance, quoted and re-checked
  8. Septic Systems, quoted and re-checked
  9. Additional Residential Accommodations (ARA), quoted and re-checked
  10. planning.rctlma.org, quoted and re-checked
  11. Ordinance No. 348.4997 — Riverside County Land Use Ordinance, quoted and re-checked
  12. 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
  13. Building Codes | Building and Safety Riverside County TLMA, quoted and re-checked
  14. Agricultural Exemption, quoted and re-checked
  15. Code & Ordinance Requirements | Building and Safety Riverside County TLMA, quoted and re-checked
  16. Code & Ordinance Requirements | Building and Safety Riverside County TLMA, quoted and re-checked
  17. Riverside County Department of Building and Safety (building.rctlma.org)
  18. Online Submittal, quoted and re-checked
  19. Building and Safety Fee Schedules, quoted and re-checked
  20. Riverside: Permits (Riverside County), quoted and re-checked
  21. Moreno Valley: Chapter 8.20 California Building Code (Riverside County), quoted and re-checked
  22. Menifee: Permits / Plan review (Riverside County), quoted and re-checked
  23. Jurupa Valley: Frequently Requested Permit Applications (Riverside County), quoted and re-checked
  24. Lake Elsinore: Permits & Inspection (Riverside County), quoted and re-checked
  25. Ordinance No. 348.4997 — Riverside County Land Use Ordinance, quoted and re-checked
  26. planning.rctlma.org, quoted and re-checked
  27. Riverside County Ordinance No. 348, Land Use Planning and Zoning Regulations, quoted and re-checked
  28. Riverside County Ordinance No. 348, Land Use Planning and Zoning Regulations, quoted and re-checked
  29. Riverside County Ordinance No. 348.4997, quoted and re-checked
  30. Riverside County Ordinance No. 348, Land Use Planning and Zoning Regulations, quoted and re-checked
  31. Riverside: Zoning Code and Regulations (Riverside County), quoted and re-checked
  32. Moreno Valley: Title 9 Planning and Zoning (Riverside County), quoted and re-checked
  33. Corona: Title 17 Zoning (Riverside County), quoted and re-checked
  34. Menifee: Development Code (Riverside County), quoted and re-checked
  35. Murrieta: 16.06.010 Zoning Districts Established (Riverside County), quoted and re-checked
  36. Temecula: City of Temecula Code of Ordinances (Riverside County), quoted and re-checked
  37. Jurupa Valley: Municipal Code | Jurupa Valley, CA (Riverside County), quoted and re-checked
  38. Indio: City of Indio, CA Code of Ordinances (Riverside County), quoted and re-checked
  39. Eastvale: Residential and agricultural permitted uses and development standards (Riverside County), quoted and re-checked
  40. Beaumont: Zoning Information | Beaumont, CA (Riverside County), quoted and re-checked
  41. San Jacinto: Chapter 17.200: Establishment of Zones, Adoption of Zoning Map (Riverside County), quoted and re-checked
  42. Temecula: Septic Systems (Riverside County), quoted and re-checked
  43. Riverside County Ordinance No. 348.4997, quoted and re-checked
  44. Riverside County Ordinance No. 348.4997, quoted and re-checked
  45. Riverside County Ordinance No. 348, Land Use Planning and Zoning Regulations, quoted and re-checked
  46. Riverside County Ordinance No. 348.4997, quoted and re-checked
  47. Riverside County Ordinance No. 348, Land Use Planning and Zoning Regulations, quoted and re-checked
  48. Riverside County Ordinance No. 348.4997, quoted and re-checked
  49. Riverside County Ordinance No. 348, Land Use Planning and Zoning Regulations, quoted and re-checked
  50. Riverside County Ordinance No. 348.4997, quoted and re-checked
  51. Riverside County Ordinance No. 348.4997, quoted and re-checked
  52. Countywide Design Standards & Guidelines, quoted and re-checked
  53. Riverside County Planning Department (planning.rctlma.org)
  54. Ordinances | Riverside County Department of Environmental Health, quoted and re-checked
  55. Septic Systems | Riverside County Department of Environmental Health, quoted and re-checked
  56. Riverside County Local Agency Management Program, quoted and re-checked
  57. Riverside County Local Agency Management Program, quoted and re-checked
  58. Riverside County Department of Environmental Health - Land Use Program (Downtown Riverside Office) (rivcoeh.org)
  59. Ordinance No. 348, quoted and re-checked
  60. planning.rctlma.org, quoted and re-checked
  61. Riverside County Ordinance No. 460, Regulating the Division of Land, quoted and re-checked
  62. County of Riverside Building Permit Application, quoted and re-checked
  63. Ordinance No. 460.147: Regulating the Division of Land, quoted and re-checked
  64. Riverside County Ordinance No. 458.18 — Regulating Special Flood Hazard Areas and Implementing the National Flood Insurance Program, quoted and re-checked
  65. Effective property tax rate: Bolthole Index county data
  66. Median property tax bill: Bolthole Index county data
  67. Short-Term Rental Program, quoted and re-checked

Written October 11, 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, Riverside County requires a building permit for a home.

RuleRiverside CountySan Diego CountyImperial CountySan Bernardino CountyOrange CountyLos Angeles CountyVentura County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Dept. of Env. HealthCounty Dept. of Env. Health & QualityCounty Public Health Dept.County Env. Health ServicesCounty Health Care AgencyCounty Dept. of Public HealthCounty Env. Health Div.

County locator

Riverside County in California

6
County map
Riverside County highlighted among the California counties · colored by Index score

How Riverside County scores

Seclusion3100% ev.
Self-Sufficiency17100% ev.
Admin Boringness41100% ev.
Durability21100% ev.
Property Autonomy56100% ev.
Carry Cost28100% 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 →

$609kTypical home
0.8%Property tax
$19,831Land / acre
8"Annual rain
32.7% of yrsSevere drought
84.3 / yr (+25.3)Mid-century 100°F days
97.8 daysMid-century dry spell
1.03" (+5.8%)Mid-century 1-day rain
1.1×Wildfire change factor
100%Forward climate coverage
$1,487Home insurance / yr
4.7% / yrInsurance growth
1.54%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
507,718Radius comparison (15 mi)
345.7People / sq mi
64.3%Federal land
69.3%Land at 15% slope or less
12.9%Soils rated "not limited" for septic (strict USDA rating)
521,092 acWorkable land screen
10.9%Wooded land
20.4 tonsBiomass / forest ac
68.7°FAvg temp

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Cities and towns in Riverside 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: Banning · Corona · Hemet · Perris

Answers from the rulebook for Riverside County

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

Riverside County rules

  • Building permitRequired

    Construction, placement, alteration, repair, movement, demolition, or occupancy changes involving buildings, structures, or regulated electrical, gas, mechanical, or plumbing systems handled by Riverside County Building and Safety.

    • The applicant must obtain the required building permit before construction or placement of any building, structure, or equipment.
    • Plans and supporting documentation must comply with current adopted California Building Codes, Riverside County Ordinance 457, and California Title 25 regulations in effect when plans are submitted and fees are paid.
    • All Building Department plan-submittal and fee requirements apply.
    • The source is the County Building and Safety Department; incorporated municipalities may administer their own permitting systems.
    “The applicant shall obtain the required building permit(s) from the building department prior to any construction on the property.”
  • Owner-builder exemptionAvailable (with conditions)

    A property owner applying for a Riverside County building permit as an owner-builder.

    • The owner-builder is the permit holder of record and is responsible and liable for construction.
    • The owner must affirm under penalty of perjury that an applicable exemption from the Contractors' State License Law exists.
    • An owner may perform all or portions of the work personally or through employees whose wages are their sole compensation when the structure is not intended or offered for sale.
    • Alternatively, the owner may contract exclusively with licensed contractors.
    • The owner-builder permit application and notice must be completed and signed; the County will not issue the permit until the required notice is completed and returned.
    • If non-licensed persons are employed and total construction value is at least $500, including labor and materials, the owner may be considered an employer.
    • For single-family residential structures intended to be offered for sale, the County notice states that all work must be performed by licensed subcontractors with no more than four structures in a calendar year, or under contract with a licensed general building contractor.
    • Except for a personal residence in which the owner must have resided at least one year before completion, the owner-builder may not legally sell a structure not constructed entirely by licensed contractors.

    construction value threshold for possible employer status: >= 500 USD (Includes labor and materials)

    “I, am exempt from licensure under the Contractors’ State License Law for the following reasons:”
  • Building code adoptedAdopted (with conditions)

    Riverside County's adopted model building codes, as modified by the State of California.

    • The County page states that state law requires all California cities and counties to enforce building codes mandated by the California Building Standards Commission.
    • Riverside County states it adopted the 2025 California Building, Residential, Mechanical, Plumbing, Electrical, Energy, and Green Codes by ordinance, as modified by the State of California.
    • The County's official notice states that the 2025 California Building Standards Code goes into effect January 1, 2026.
    • The notice page contains a conflicting subheading stating January 1, 2029; its operative paragraph states January 1, 2026.

    adopted code edition: 2025 (as modified by the State of California) · effective date: 2026-01-01

    “The County of Riverside has adopted by ordinance the following model codes as modified by the State of California: California Building Code, 2025 edition California Residential Code, 2025 edition California Mechanical Code, 2025 edition California Plumbing Code, 2025 edition California Electrical Code, 2025 edition California Energy Code, 2025 edition California Green Code, 2025 edition”
  • InspectionsRequired

    Buildings and structures subject to Riverside County Building and Safety permitting before any use or occupancy.

    • An approved final building inspection is required before use or occupancy.
    • A certificate of occupancy is also required before use or occupancy under the cited County Building and Safety guidance.
    • Commercial buildings are additionally subject to physical on-site inspection by Building and Safety and the Fire Department before occupancy.
    “The Building and Safety and the Fire Department conduct a physical on-site inspection of all commercial buildings before they are occupied.”
  • Certificate of occupancyRequired

    Buildings and structures subject to Riverside County Building and Safety permitting before use or occupancy.

    • The certificate must be obtained before any use or occupancy of the building or structure.
    • For commercial, industrial, and office buildings, the requirement includes new buildings, remodeled or expanded existing buildings, and changes in occupancy classification or use.
    • For commercial occupancy, approval of code compliance and payment of fees precede issuance; the printed certificate must be permanently posted in a conspicuous place.
    “The applicant shall obtain an approved final building inspection and certificate of occupancy from the building department prior to any use or occupancy of the building, or structure.”
  • County-wide zoningPresent (with conditions)

    County zoning in Riverside County's unincorporated area under County Ordinance No. 348.4997.

    • The ordinance expressly applies to the unincorporated area of Riverside County.
    • Land is assigned to mapped zoning districts and zone classifications; applicable uses and development standards depend on the particular district and ordinance provisions.
    • The cited ordinance identifies Map No. 2 as covering unincorporated county areas not included in other mapped zoning districts; some listed mapped districts include areas later annexed into cities.
    “All the unincorporated area of the County of Riverside is placed in a series of mapped zoning districts. All those areas shown within the boundaries of the following maps are placed within the zone classifications shown on said maps, as adopted or thereafter amended:”
  • Local zoningVaries (with conditions)

    Aggregate countywide conclusion for local zoning: Riverside County regulates zoning in unincorporated areas, while incorporated cities exercise their own local land-use authority; requirements therefore vary by whether a parcel is in unincorporated county territory or an incorporated city.

    • The County Ordinance No. 348 zoning rule cited here is expressly for unincorporated county areas.
    • The County's official MSHCP page describes Riverside and its Cities as controlling local land-use decisions across multiple jurisdictions.
    • This aggregate claim does not treat the County as administering each incorporated city's zoning ordinance.
    • Parcel-specific district classifications, permitted uses, approvals, and development standards must be checked separately.
    “The MSHCP allows Riverside and its Cities to better control local land-use decisions and maintain a strong economic climate in the region while addressing the requirements of the state and federal Endangered Species Acts.”
  • Minimum dwelling sizeSpecified

    Dwellings in unincorporated Riverside County, subject to applicable zoning-map requirements.

    • Minimum floor living area is 750 square feet.
    • An official zoning plan map may require a larger minimum size in a particular area.
    • Porches, garages, patios, and similar features are excluded from floor living area.

    minimum floor living area: >= 750 square feet (A larger minimum may be required by an official zoning plan map.)

    “No dwelling shall be constructed unless it has a minimum floor living area of not less than 750 square feet, provided, however, a larger minimum size dwelling may be specifically required in any area of the County by an official zoning plan map pursuant to Section 18.35. of this ordinance. Porches, garages, patios and similar features, whether attached or detached to a dwelling, shall not be included when calculating the floor living area.”
    One more reviewed finding on this topic
    • Specified — Dwellings constructed in unincorporated Riverside County under Ordinance No. 348.
      “No dwelling shall be constructed unless it has a minimum floor living area of not less than 750 square feet, provided, however, a larger minimum size dwelling may be specifically required in any area of the County by an official zoning plan map pursuant to Section 18.35. of this ordinance. Porches, garages, patios and similar features, whether attached or detached to a dwelling, shall not be included when calculating the floor living area.”
  • Minimum lot sizeDistrict specific (with conditions)

    Lots in the Riverside County R-R Rural Residential Zone in unincorporated Riverside County.

    • The minimum is one-half acre with a minimum average width of 80 feet, including the area to the center of adjacent streets.
    • Public utilities may use 20,000 square feet with a minimum average lot width and depth of 100 feet.
    • The applicable zoning classification and any area-specific standards must be checked.

    minimum lot area: >= one-half acre (public utilities: 20,000 square feet with minimum average lot width and depth of 100 feet) · minimum average lot width: >= 80 feet (public utilities: minimum average lot width and depth 100 feet)

    “One-half acre, with a minimum average width of 80 feet, including the area to the center of adjacent streets, shall be the minimum size of any lot except as follows: 1. Public utilities, 20,000 square feet with a minimum average lot width and depth of 100 feet.”
    2 more reviewed findings on this topic
    • District specific (with conditions) — Lots in the Riverside County R-2 Multiple Family Dwellings Zone.
      “Lot area shall be not less than 7,200 square feet. The minimum lot area shall be determined by excluding that portion of a lot that is used solely for access to the portion of a lot used as a building site.”
    • Specified — A-2 Heavy Agriculture Zone in unincorporated Riverside County.
      “Lot size shall not be less than 20,000 square feet, with a minimum average lot width of 100 feet and a minimum average lot depth of 150 feet, unless larger minimum lot area and dimensions are specified for a particular area or use, except as follows:”
  • SetbacksSpecified

    Residential subdivisions with minimum lot size of one-half acre or less in the listed Riverside County residential zoning categories and General Plan designations, subject to the County Residential Design Standards & Guidelines.

    • The standards apply to residential subdivisions with a minimum lot size of one-half acre or less in R-1, R-1A, R-2, R-2A, R-3, R-3A, R-4, and R-6 zoning categories and the listed General Plan residential designations.
    • For residential lots smaller than 7,200 square feet, standards related to unit location, setbacks, lot coverage, and street frontage may be waived if the applicants demonstrate that the Planning Objectives have been addressed and provide privacy and personal space for each unit.
    • The County standards do not apply where other standards are imposed by the Planning Commission or Board of Supervisors, adopted for a designated District area such as a Community Plan or Specific Plan, or where physical site constraints make a standard impractical.
    • Planned Residential Development, Specific Plan, or Incentives Program provisions may allow smaller setbacks case by case, with minimum spacing determined by UBC requirements.
    • Yard encroachments permitted under Ordinance No. 348 may interrupt structure spacing; on lots under 7,200 square feet, side-yard encroachment may occur in only one side yard and the gate-opening side yard must remain at least five feet wide.
    • A patio or patio cover may extend into a rear yard by right up to 10 feet with no Planning permit, but a Building and Safety Department permit is required; swimming pools and pool equipment may extend into the backyard, with a setback adjustment, to within five feet of the property line.

    front yard setback average: 20 feet (May be varied by up to 25%, in increments of any size.) · minimum front yard setback: >= 15 feet · minimum front yard setback for side-loaded garages on lots 7,200 square feet or greater: >= 15 feet · minimum front yard setback for side-loaded garages on lots less than 7,200 square feet: >= 10 feet · minimum spacing between structures: >= 10 feet (Zero-lot-line developments require a three-foot maintenance easement.)

    “The "Residential Standards" in this document are required for any residential subdivision with a minimum lot size of one- half acre or less, and is located in the following residential zoning categories: R-1, R-1A, R-2, R-2A, R-3, R-3A, R-4 and R-6 and the following General Plan Land Use Designations: Low Density Residential (0.5 acre minimum), Medium Density Residential (2-5 dwelling units per acre), Medium High Density Residential (5-8 dwelling units per acre), High Density Residential (8-14 dwelling units per acre), Very High Density Residential (14-20 dwelling units per acre), Highest Density Residential (20+ dwelling units per acre).”
    3 more reviewed findings on this topic
    • Specified — Buildings and structures in the A-2 Heavy Agriculture Zone in unincorporated Riverside County.
      “Minimum yard requirements shall be 20 feet front yard, ten feet side and rear yard.”
    • District specific (with conditions) — Buildings in the Riverside County R-2 Multiple Family Dwellings Zone.
      “The front yard shall be not less than 20 feet, measured from the existing street line or from any future street line as shown on any specific plan of highways, whichever is nearer the proposed structure. Side yards on interior and through lots shall be not less than ten percent of the width of the lot, but not less than three feet in width in any event, and need not exceed a width of five feet.”
    • District specific (with conditions) — Development setbacks for property in unincorporated Riverside County; the applicable setback depends on the parcel's zoning classification.
      “Setbacks vary depending on your zoning classification. In order to find your setbacks, you first need to find out your zoning.”
  • Lot coverageSpecified

    Dwelling coverage in the Riverside County R-1 Zone in unincorporated Riverside County.

    • The standard states that no more than 50 percent of any lot may be covered by dwelling.
    • Planned residential developments follow Section 18.5 standards.

    maximum dwelling lot coverage: <= 50 percent (Planned residential developments comply with Section 18.5.)

    “F. Automobile storage space shall be provided as required by Section 18.12. of this ordinance. G. Lot Coverage: In no case shall more than 50% of any lot be covered by dwelling. Amended Effective:”
    2 more reviewed findings on this topic
  • Building heightSpecified

    Buildings and structures in the A-2 Heavy Agriculture Zone in unincorporated Riverside County.

    • One-family residences may not exceed 40 feet.
    • Other buildings or structures may exceed 50 feet only if approved under Section 18.34, but a building may not exceed 75 feet and another structure may not exceed 105 feet unless a variance is approved under Section 18.27.

    maximum height of one-family residence: <= 40 feet · standard maximum height of other building or structure: <= 50 feet (Greater height may be approved pursuant to Section 18.34; absolute limits are 75 feet for a building and 105 feet for another structure unless a Section 18.27 variance is approved.) · absolute maximum building height without variance: <= 75 feet (Section 18.27 variance exception stated in the ordinance.) · absolute maximum other-structure height without variance: <= 105 feet (Section 18.27 variance exception stated in the ordinance.)

    “One family residences shall not exceed forty (40’) feet in height. No other building or structure shall exceed fifty (50’) feet in height, unless a greater height is approved pursuant to Section 18.34. of this ordinance. In no event, however, shall a building exceed seventy-five (75’) feet in height or any other structure exceed one hundred five (105’) feet in height, unless a variance is approved pursuant to Section 18.27. of this ordinance.”
    3 more reviewed findings on this topic
    • Specified — Buildings and structures in the R-7 Zone in unincorporated Riverside County.
      “E. HEIGHT. The maximum height of any buildings or structures shall be no greater than seventy-five (75) feet.”
    • District specific (with conditions) — Buildings in the Riverside County R-2 Multiple Family Dwellings Zone.
      “Building height shall not exceed three stories, with a maximum height of 40 feet.”
    • Specified — Buildings in the Riverside County R-1 Zone in unincorporated Riverside County.
      “The following standards of development shall apply in the R-1 Zone, except that planned residential developments shall comply with the development standards contained in Section 18.5. of this ordinance. A. Building height shall not exceed three stories, with a maximum height of 40 feet.”
  • Living in an RVLimited

    Occupancy of recreational vehicles in Riverside County recreational vehicle parks, including extended or permanent occupancy at qualifying existing parks.

    • Recreational vehicles staying longer than 30 consecutive days or 120 days in any one calendar year must be able to connect to sewer and water service at the space.
    • The site must provide water and sewer connections approved by the County Health Department.
    • Extended or permanent occupancy permits are available only to an existing recreational vehicle park operating under a Riverside County permit approved before January 1, 1987.
    • All recreational vehicle parks require the applicable zoning approval and recreational vehicles on a long-term or permanent basis must be registered with the California Department of Motor Vehicles.

    consecutive stay threshold: > 30 days (The ordinance also specifies a 120-day limit in any one calendar year.) · annual stay threshold: > 120 days (The ordinance also specifies a 30-consecutive-day threshold.)

    “Only recreational vehicles which can connect to sewer and water service at the recreational vehicle space shall be allowed to stay for longer than 30 consecutive days or 120 days in any one calendar year, and such recreational vehicles must be located on sites where water and sewer connection are provided as approved by the County Health Department.”
    One more reviewed finding on this topic
    • Allowed — Parking a personal recreational vehicle on private property in unincorporated Riverside County.
      “The Riverside County Zoning Ordinance does not have restrictions on parking your personal Recreation Vehicle on your property. However, you may have private restrictions outlined within the Covenants, Conditions, and Restrictions (CC&Rs) written and adopted for your residential development.”
  • Camping on your landAllowed (with conditions)

    Tent camping in Riverside County recreational vehicle parks.

    • Tent camping may occur only in areas designed and designated for that usage.
    • For vacation parks, occupancy remains subject to the 30-consecutive-day and 120-days-per-calendar-year limits.
    • For extended-occupancy parks, occupancy remains subject to the nine-month-per-calendar-year limit.
    • Applicable zoning and park-approval requirements also apply.
    “Tent camping may be permitted in areas designed and designated for such usage.”
    One more reviewed finding on this topic
    • Limited — Tents, recreational vehicles, or motorhomes used for overnight stays during an approved temporary event in unincorporated Riverside County.
      “As part of an approved temporary event permit, the Planning Director shall allow tents, recreational vehicles or motorhomes to be used”
  • Tiny homesLimited

    Permanent year-round occupancy of tiny homes in unincorporated Riverside County.

    • Allowed by right in R-7 and MU zones and in zoning classifications permitting one-family dwellings or accessory dwelling units.
    • A plot plan approved under Section 18.30 is required when the lot is adjacent to a National Register historic property.
    • Prohibited in areas constrained by water availability, water quality, sewage disposal, or other health and safety concerns.
    • Prohibited where a development moratorium applies because of deficient water supply or inadequate sewer or septic capacity.
    • Applications must include a site design plan and be processed under the ordinance, Ordinance No. 671, and Ordinance No. 457, as applicable.
    • Approval requires compliance with the Article's requirements and development standards, as applicable; required Environmental Health, Fire Department, water, and sewer approvals must be obtained.
    • Written Environmental Health confirmation is required for use of an existing or new septic system, as applicable, and a percolation test must be completed and certified within the last year or recertified by Environmental Health, as applicable.
    • Factory-built tiny homes transported to a residential site must comply with Health and Safety Code sections 19960 et seq. and Title 25, CCR sections 3000 et seq., as amended.
    • A tiny home must be installed on a concrete slab foundation.
    • The minimum lot size is 1,500 square feet, maximum height is 25 feet, side and rear setbacks are at least 5 feet, and a tiny home may not exceed 500 square feet excluding patios, porches, garages, and similar structures.
    • A split-level tiny home must have at least 150 square feet of first-floor living space; off-street parking is required under Section 18.12.

    minimum lot size: >= 1500 square feet · maximum height: <= 25 feet · side and rear setbacks: >= 5 feet (No front setback is required except as needed for off-street parking.) · maximum tiny-home area: <= 500 square feet (Patios, porches, garages, and similar structures are excluded.) · minimum split-level first-floor living space: >= 150 square feet

    “permitted in the unincorporated area [...] permanent year round occupancy by one household [...] allowed as a use by right in the R-7 and MU zone classifications”
  • Manufactured homesAllowed (with conditions)

    Use of a mobile or fabricated home as a single-family dwelling on private property in unincorporated Riverside County.

    • The property must be in a zone that permits one-family dwellings.
    • The use remains subject to conditions prescribed in the particular zone.
    • The owner must meet applicable development requirements for the zoning designation.
    • If using a septic tank, the owner must work with the Riverside County Department of Environmental Health.
    • The home may be required to be placed on a permanent foundation.
    • The parcel location may determine applicable Certificate of Land Division Compliance, Plot Plan, School Fees, RSA, mitigation, and Building Permit fees.
    “A property owner may utilize a mobile home or fabricated home as a single-family dwelling on his property in all zones that permit one-family dwellings subject to conditions as prescribed in the particular zone.”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units in unincorporated Riverside County on lots zoned for one-family or multiple-family dwellings.

    • ADUs and junior ADUs qualifying under Government Code section 65852.2(e)(1) are outside Article XIXj and must be approved ministerially under that statute.
    • ADUs that do not meet Government Code section 65852.2(e)(1) must comply with Article XIXj.
    • Additional residential accommodations are permitted by-right on lots zoned for one-family or multiple-family dwellings.
    • They are not permitted where the existing dwelling lacks required building permits, or where the lot is constrained by water availability, water quality, sewage disposal, or other public health and safety concerns, including applicable water or sewer development moratoria.
    • No discretionary land use permit such as a plot plan or conditional use permit is required, but every application must include a site design plan demonstrating compliance with Article XIXj development standards.
    • ADU or junior ADU applications must be acted upon within 60 days, subject to the ordinance's stated allowance for delaying action until after action on a new primary-dwelling application on the same lot.
    • Required approvals from Riverside County Environmental Health, Fire Department, and Airport Land Use Commission must be obtained before submittal where applicable.
    • For a one-family dwelling, one attached or interior and one detached additional residential accommodation are permitted per lot. For a multiple-family dwelling, one interior ADU per lot or up to 25 percent of existing units, whichever is greater, and two detached ADUs per lot are permitted.
    • MOG units and ranchets are limited to the Eastern Coachella Valley; these are additional residential accommodations but are not ordinary ADUs.

    ADU application action period: 60 days (The County may delay action until after acting on an application for a new primary dwelling on the same lot) · interior ADU allowance in multiple-family dwelling: 25% of existing units or one unit, whichever is greater · detached ADU allowance in multiple-family dwelling: 2 units per lot

    “An ADU is one of several types of ARAs allowed in the unincorporated areas of Riverside County.”
    One more reviewed finding on this topic
    • Allowed (with conditions) — Accessory dwelling units on lots with a proposed or existing primary residence in unincorporated Riverside County.
      “An Accessory Dwelling Unit, or ADU, is a specific type of housing defined in State law as an attached or a detached residential dwelling unit that provides complete independent living facilities for one or more persons and is located on a lot with a proposed or existing primary residence. The State requires every city and county to permit ADUs by-right. An ADU is one of several types of ARAs allowed in the unincorporated areas of Riverside County.”
  • Who permits septicCounty

    Onsite wastewater treatment systems and sewage-disposal approvals in unincorporated Riverside County.

    • The California State Water Resources Control Board OWTS Policy authorizes local agencies such as county environmental health departments to issue OWTS permits.
    • The State Water Board identifies unincorporated Riverside County in Region 7's local-agency jurisdiction list.
    “Region 7 Imperial County, Unincorporated Riverside County, City of Needles”
  • Septic permitRequired

    Installation, repair, modification, reconstruction, conversion, or alteration of septic/onsite wastewater treatment systems in unincorporated Riverside County; the county page also references contracted cities.

    • The county rule expressly applies to unincorporated areas; it should not be treated as countywide for incorporated municipalities that are not contracted jurisdictions.
    • A written approval from the Director is required before erecting, constructing, rebuilding, converting, or altering plumbing designed for sewage disposal; in designated areas that approval also constitutes a construction permit.
    • No OWTS will be approved or processed where connection to a sanitary sewer is a practical option.
    • Applications require the Department form, the Ordinance 640 fee, a scaled engineered contoured plot plan, and any required percolation and groundwater/bedrock evaluations.
    • Conventional OWTS applications are approved or denied within fifteen working days; alternative OWTS applications within thirty working days.
    • Installation must follow the approved design; all OWTS require construction inspection and final approval before use.
    • For a new septic system, the county page additionally requires a local building permit, percolation report with three sets of detailed plans signed by a registered Professional of Record, a floor plan, established water-service documentation, and an OWTS Construction Application with fees.

    conventional OWTS initial review: 15 working days (after the date of filing) · alternative OWTS initial review: 30 working days (after the date of filing) · application drawing scale: 1 inch = 40 feet or larger · application amendment period after denial: 1 year (later resubmittal is treated as a new application and subject to new fees)

    “An OWTS Construction Application is required for the installation, repair or modification of all septic systems within unincorporated areas of Riverside County”
    One more reviewed finding on this topic
    • Required — Installation, repair, or modification of septic systems in unincorporated Riverside County and contracted cities covered by the county program.
      “An OWTS Construction Application is required for the installation, repair or modification of all septic systems within unincorporated areas of Riverside County or its contracted cities.”
  • Septic inspectionRequired

    Onsite wastewater treatment systems serving manufactured-home projects and private sewage-disposal systems addressed by Riverside County's installation guidance.

    • Private sewage-disposal-system inspection must be scheduled with the Environmental Health Department before a final inspection request on the site-preparation permit.
    • All site-utility inspection items must be approved before trench backfill; a final inspection must be requested after backfilling and compaction.
    “private sewage disposal system inspection must be scheduled with the Environmental Health Department prior to a final inspection request”
  • Off-grid sanitationLimited

    Non-sewer sanitation using holding tanks, alternative treatment systems, or other Department-approved sewage facilities in unincorporated Riverside County.

    • Holding tanks are temporary and require pumping by a registered liquid-waste hauler for offsite disposal at an approved wastewater treatment facility.
    • A holding tank may be approved for no more than two years, with sewer-service documentation; an extension may be granted for cause at the Department's sole discretion.
    • A holding tank may not be placed in a public right-of-way without written approval from the responsible public agency.
    • Wholesale and retail food facilities may not use holding tanks.
    • When sewer becomes available, the holding tank must be removed or destroyed and connection made within sixty calendar days.
    • The applicant must submit a Land Use application and fee, site and plumbing plans, a registered-hauler pumping contract and schedule of at least once per week, and a high-level alarm detail.
    • A holding tank may replace an existing single-family dwelling system only when sewer, a conventional OWTS, or an alternative OWTS is not feasible and the Department approves it in writing.
    • Alternative OWTS require a QSP maintenance agreement, annual QSP inspection, and a renewable annual operating permit.
    • The Ordinance 650 title and operative provisions expressly regulate sewage discharge in unincorporated areas.

    maximum holding-tank approval period: <= 2 years (extension for cause may be granted by the Department) · sewer connection/removal deadline after sewer availability: 60 calendar days · minimum holding-tank pumping frequency: once per week · alternative OWTS operating permit: annual and renewable

    “A holding tank may be approved for a period not to exceed two years.”
    One more reviewed finding on this topic
  • Well permitRequired

    Construction, reconstruction, or destruction of wells throughout Riverside County.

    • The permit is a Riverside County Environmental Health Permit.
    • To construct or destroy a well, the applicant must first contact a Registered Well Driller to prepare the application for submittal.
    “A Riverside County Environmental Health Permit for construction, reconstruction or destruction of a well is required throughout the county.”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural grading or clearing performed exclusively for commercial agricultural purposes in Riverside County.

    • The agricultural grading/clearing certificate must be filed with the Building Official before commencing agricultural grading or clearing.
    • The certificate must be accompanied by the appropriate processing fee.
    • An approved erosion-control plan from USDA Natural Resources Conservation Service or a licensed soil engineer is required when grading or clearing under the exemption involves a slope angle of 10 percent or greater.
    • A completed Agricultural Grading/Clearing Verification must be filed under penalty of perjury within one year of filing the certificate; where an erosion-control plan was required, written confirmation that the plan work was performed must accompany the verification.
    • The exemption is restricted to areas disturbed for actual farming.
    • The exemption does not apply to grading or clearing associated with construction of any building or structure, or to activity requiring a Land Use Permit.
    • The filing does not authorize activity prohibited by Ordinance No. 457, another County ordinance, or state or federal law.
    • If the Building Official determines that planned or actual grading or clearing is not for agricultural purposes, a grading permit is required.
    • The current Building and Safety fee schedule lists $62.50 for agricultural exempt/no-inspection and agricultural exempt/inspection-required fee-only entries.

    slope threshold requiring erosion-control plan: >= 10 percent (approved USDA Natural Resources Conservation Service or licensed soil engineer plan) · verification deadline: 1 year after certificate filing (verification under penalty of perjury) · processing fee: 62.5 USD (fee schedule distinguishes no-inspection and inspection-required agricultural exemption entries)

    “The Agricultural Grading/Clearing Certificate shall be filed with the Building Official prior to commencing the agricultural grading or clearing.”
  • Subdividing landRegulated (with conditions)

    All land divisions in the unincorporated area of Riverside County.

    • Land divisions must comply with the California Subdivision Map Act, Riverside County Ordinance No. 460, the Riverside County Comprehensive General Plan, applicable specific plans, the Land Use Ordinance, and other applicable ordinances.
    • Ordinance No. 460 states that its requirements are minimum requirements and the County may impose greater requirements if justified.
    • Exceptions relating to design or improvement may be granted only by the appropriate Advisory Agency or Appeal Board for special circumstances such as size, shape, topography, or existing road alignment and width, and only if the modification will not harm public health, safety, welfare, or nearby property; a written justification must accompany the land-division application.
    • No person may make a land division in the unincorporated area except in accordance with the Subdivision Map Act and Ordinance No. 460.
    • When a tentative map has been submitted, grading or construction may not begin until the tentative map is approved by the appropriate approving body.
    • Tentative maps must be submitted to the Planning Director with the fee specified in Ordinance No. 671 and must comply with Article V; map sheets must be at least 18 by 26 inches.
    • The filing date for the 50-day tentative-map action period is the date the Planning Director accepts the map as complete; the Planning Director may request additional information within 30 days, including environmental, flood and drainage, sewage-disposal, and circulation information.
    • For a land division resulting from a violation, permits or approvals necessary to develop the property are denied unless the Planning Director finds that development would not be contrary to public health, welfare, or safety. The applicant may apply to the Planning Director for that determination and possible issuance of a Certificate of Compliance.
    • The ordinance includes procedures for approved, conditionally approved, waived-map, and Certificate of Compliance cases; applicable fees are set by Ordinance No. 671.

    tentative map action period: 50 days (Measured from the date the Planning Director accepts the map as complete for filing, subject to the ordinance's environmental-review provision.) · additional-information determination: 30 days (The Planning Director determines whether additional information is required within 30 days after submission.) · tentative map sheet minimum size: >= 18 x 26 inches · map number application fee: 26 USD (The County's Dividing Your Land page states this fee; applicable land-division fees may also be set by Ordinance No. 671 and current fee schedules.)

    “All land divisions in the unincorporated area of the County of Riverside as hereinafter defined are subject to all of the applicable provisions of the Subdivision Map Act and this ordinance.”
    2 more reviewed findings on this topic
    • Regulated (with conditions) — Land divisions in unincorporated Riverside County.
      “All land divisions in the unincorporated area of the County of Riverside as hereinafter defined are subject to all of the applicable provisions of the Subdivision Map Act and this ordinance.”
    • Regulated (with conditions) — Division of land in the unincorporated area of Riverside County.
      “No person shall make any land division, as herein defined, of real property located in the unincorporated area of the County of Riverside, except in accordance with the provision of the Subdivision Map Act and this ordinance. B. When a tentative map has been submitted, no grading or construction work shall be performed until the tentative map has been approved by the appropriate approving body.”
  • Building in a floodplainLimited

    Structures, substantial improvements, grading, filling, or other development in designated floodways in the unincorporated areas of Riverside County.

    • No structure may be constructed, located, or substantially improved and no land may be graded, filled, or developed in a designated floodway unless a plan is approved showing that the proposed development will not increase flood levels during the base-flood discharge.
    • A qualifying floodway proposal must also satisfy all requirements for a permit in a Special Flood Hazard Area or floodplain.
    • Until a regulatory floodway is adopted, no new construction or other development, including fill, is permitted in Zones A, A1-30, and AE unless the cumulative effect, together with all other development, will not increase the base-flood water-surface elevation by more than one foot or the amount determined by RCFC&WCD or CVWD at any point along the floodplain.
    • Development in the Colorado River floodway must satisfy both the National Flood Insurance Program and the Colorado River Flood Protection Act.

    maximum cumulative base-flood water-surface-elevation increase before regulatory floodway adoption: <= 1 foot (RCFC&WCD or CVWD may determine the applicable amount at any point along the floodplain.)

    “will not result in any increase in flood levels”
  • Short-term rentalsLimited

    Short-term rentals in legally privately owned residential dwellings in unincorporated Riverside County.

    • A Short-Term Rental Certificate is required before advertising, maintaining, operating, or using a short-term rental.
    • Certificates renew annually and a separate certificate is required for each property.
    • Applications must include correct documents and paid fees through the online portal; physical applications and payments are not processed in person or by phone.
    • Initial application fee is $740 and annual renewal fee is $540; the page also announces Ordinance 927.3 effective September 24, 2026 and updated fees under Ordinance 671.25 effective October 25, 2026, so the cited fee amounts may be superseded after that date.
    • Rentals are for fewer than 30 consecutive calendar days but at least two consecutive days and one night.
    • Hotels, motels, bed-and-breakfast inns, commercial uses, certain events, recreational vehicles, yurts, tents, treehouses, and other non-habitable structures are restricted or prohibited.
    • Responsible guests must be at least 25 in Wine Country Districts and at least 21 outside Wine Country Districts.
    • Adequate on-site parking is required.
    • Wine Country occupancy limits include Class I maximum 10 occupants and Class II maximum 20 occupants; acreage-based limits also apply.

    minimum rental duration: >= 2 consecutive days (Also at least one night) · maximum rental duration: < 30 consecutive calendar days (Hourly rentals are not permitted) · initial STR application fee: 740 USD (Page announces updated fees effective October 25, 2026) · annual STR renewal fee: 540 USD (Page announces updated fees effective October 25, 2026) · Wine Country Class I maximum occupancy: <= 10 occupants · Wine Country Class II maximum occupancy: <= 20 occupants (Class II eligibility requires at least 50% of net acreage planted with vineyards or other agricultural crops and Planning Department determination)

    “The Short-Term Rental (STR) Certificate is required before advertising to rent for any Short-Term Rental.”
  • Permit feesPublished (with conditions)

    Riverside County Building and Safety permit fees for buildings, structures, and related work in the unincorporated county.

    • Final permit cost is calculated at the time of permit application.
    • Additional surcharges and mandated fees apply based on permit type.
    • The listed fee schedule includes one initial completeness review; corrections for incomplete submittals may incur additional fees.
    • Plan review includes up to two review cycles; additional reviews are charged hourly under the adopted fee schedule.
    • The inspection fee includes one inspection per trade or phase; failed inspections, incomplete work, or a site not ready are subject to reinspection fees.
    • A $100 fee applies to extend an active permit before expiration.

    single-family detached dwelling permit: 6472.45 USD (Deposit fee; final permit cost calculated at application) · permit extension: 100 USD (Applies to an active permit extended before expiration)

    “Single Family Detached Dwelling (BRS-SFD) | Deposit | $6,472.45”
  • Permit processPublished (with conditions)

    Building permit application submittal in Riverside County.

    • All permit application types are accepted through the County's PLUS Online public portal.
    • The process is subject to applicable County building codes, ordinances, forms, fees, and plan-review requirements.
    • The cited page does not establish that incorporated municipalities use the same process.
    “All types of permit applications submittal are accepted through our public portal PLUS Online.”

California rules that apply here

  • 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.”
  • Mandatory utility hookupSewer (with conditions)

    Certain existing OWTS in California Tier 3 impaired-water-body areas that commit to connect to a centralized wastewater collection and treatment system regulated through waste discharge requirements.

    • The OWTS must have been constructed and operating, or permitted, on or before the date the nearby water body was added to OWTS Policy Attachment 2.
    • The owner must commit by legally binding document to connect to a centralized wastewater collection and treatment system regulated through waste discharge requirements.
    • The owner must sign the legally binding document within 48 months after the nearby water body's initial listing on Attachment 2.
    • The specified connection date may not extend beyond nine years after the date the nearby water body is added to Attachment 2.
    • The rule is an exception to Section 10 requirements for qualifying existing or permitted systems; it is not a general statewide requirement that every property connect to public sewer.

    deadline to sign connection commitment: 48 months (Measured from the date the nearby water body is initially listed on Attachment 2.) · maximum time to complete connection: <= 9 years (Measured from the date the nearby water body is added to Attachment 2.)

    “The owner must sign the document within forty-eight months of the date that the nearby water body is initially listed on Attachment 2. The specified date for the connection to the centralized community wastewater collection and treatment system shall not extend beyond nine years following the date that the nearby water body is added to Attachment 2.”
  • 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.”
  • 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 Riverside 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 Riverside County, California

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

Riverside County scores 6/100 on the Bolthole Index, a weak county profile. Watch-outs: about 507,718 people within 15 miles and weak self-sufficiency basics: only 8″ of rain a year, in severe drought 32.7% of years.

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

Riverside County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Riverside County Department of Environmental Health (Land Use / OWTS Program). 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 Riverside County?

Living in an RV on your own land in Riverside County is allowed: Parking a personal recreational vehicle on private property in unincorporated Riverside County. Private Covenants, Conditions, and Restrictions may impose additional restrictions. This statement addresses parking and does not establish permission for residential habitation outside an authorized recreational vehicle park. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Riverside County, California?

Land in Riverside County runs about $19,831 per acre, based on the latest county data.

What is the water situation in Riverside County?

Riverside County gets about 8" of rain a year, with severe drought in roughly 32.7% of years. On water rights, Riverside County lies in the Chino Basin — Adjudicated — Adjudicated 1978 under the Chino Basin Watermaster; new appropriation effectively closed to new landowners..

How remote is Riverside County?

A typical private-land location has about 507,718 people within 15 miles and 22,663,494 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Riverside compares in California

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