Riverside County — Specific Plan Zones

Specific Plan No. 286

Planning Areas 1, 3 and 6

These are residentially regulated planning areas that use the Article VI use framework, but exclude the uses identified in § 17.76.010. Their purpose is expressed through the adopted plan and Article VI cross-reference; the source materials do not supply a separate narrative purpose statement. § 17.76.010

Key lot and building rules include:

• 5,000 sq ft minimum lot area, excluding access-only area from the building-site calculation.
• 50 ft minimum average building-site width and 80 ft minimum average building-site depth.
• 40 ft minimum frontage, reduced to 35 ft on knuckles or cul-de-sacs and 20 ft for flag lots.
• 15 ft front setback for the habitable main building and 20 ft for garages, measured from the right-of-way.
• 5 ft interior/through side yard; corner and reversed-corner lots require 10 ft from the applicable street line, subject to the stated narrow-lot limit.
• 15 ft rear yard beside identified greenbelt/open space; otherwise 20 ft.
• 50% maximum lot coverage for one-story buildings. § 17.76.010

A chimney or fireplace may extend up to 2 ft into a side yard; other encroachments are limited as stated in the cross-referenced ordinance provision. For setbacks and development standards, treat these plan-specific numbers as the first screen, not a generic residential-zone rule. § 17.76.010

Planning Areas 2A, 2C, 20, 22, 25, 35A, 35B, 52A and 52B

These areas function as plan-specific open-space areas using the Article VIIIe framework, with enumerated exclusions. Undeveloped open space and drainage areas are expressly included among the permitted Article VIIIe.a uses. § 17.76.020

The source materials assign Article VIIIe, Section 8.101 development standards rather than restating lot dimensions, height, setbacks, or coverage. Not found in source materials: a standalone numeric dimensional schedule for this group. Verify the governing plan materials and the referenced standards with the jurisdiction. § 17.76.020

Planning Areas 12B, 16A, 16B, 26A, 33 and 45

These are another Specific Plan No. 286 open-space grouping under the Article VIIIe use and development-standard framework, subject to the listed exclusions. Public parks and trails are expressly added to the Article VIIIe.a use list. § 17.76.070

The source materials do not state separate numeric lot, height, setback, or coverage standards for this group; they direct users to Article VIIIe, Section 8.101. Verify the planning-area designation and referenced standards with the jurisdiction. § 17.76.070

Planning Area 53

Planning Area 53 is a compact residential-format area under Specific Plan No. 286, using the Article VI use framework but excluding the enumerated Article VI categories. Its standards are unusually specific and materially different from Planning Areas 1, 3, and 6. § 17.168.405

The principal dimensional rules are:

• Maximum building height: 3 stories and 40 ft.
• Minimum lot area: 2,500 sq ft.
• Minimum average building-site width/depth: 35 ft / 60 ft; a flag-lot access portion must be 20 ft wide.
• Minimum frontage: 30 ft, or 20 ft for qualifying cul-de-sac/knuckle and flag lots; shared-private-driveway lots have a 15 ft individual frontage rule and a 35 ft combined frontage rule.
• Habitable main building: 6 ft front setback from right-of-way edge or sidewalk back; front-facing garages require 15 ft from right-of-way edge or 18 ft from sidewalk back.
• Side yards: 5 ft on interior/through lots, 6 ft on lots adjacent to streets, and 3.5 ft on corner lots.
• Rear yard: 9 ft; certain shade structures or similar improvements may use a 3 ft property-line setback.
• Maximum dwelling coverage: 80% of the lot. § 17.168.405

Each dwelling must provide at least 2 garage spaces. A shared private driveway may serve no more than 2 dwelling units and must remain at least 20 ft wide for its entire length; evaluate parking requirements separately where other project features are proposed. § 17.168.405

Architectural features such as chimneys and fireplaces may encroach up to 2 ft, provided the foundation remains at least 3 ft from the property line. The adopted plan’s special standards control first; other zoning requirements revert to Article VI except where this section changes them. § 17.168.405

Planning Areas 5A, 5B, 7, 10B, 12A, 13A, 13B, 14A, 14B, 21A, 21B, 23, 24, 32, 37, 38 and 44

This group follows the Article VI development standards except for two stated replacements. The rear yard must be at least 20 ft, and chimneys/fireplaces may extend up to 2 ft into side yards; other structural encroachments are restricted as stated. § 17.168.270

The source materials do not restate the purpose, permitted-use list, front/side setbacks, lot area, height, or coverage for this group. Apply the Article VI cross-reference and verify the parcel-specific adopted plan. § 17.168.270

Specific Plan No. 336

Planning Area 1

Planning Area 1 is a resort-oriented residential and recreation area. In addition to the referenced use framework, it allows resort residential dwelling units—individually owned multifamily units that may be rented through a centrally managed program under the community’s CC&Rs and Ordinance No. 927—plus an 18-hole golf course, clubhouse, driving range, athletic fields, trails, paths, and active/passive recreation including dog parks. § 17.106.010

The major standards are:

• 10 ft minimum front yard, 10 ft rear yard, and 10 ft side yard.
• Maximum 80% building/structure coverage of net lot area.
• Maximum 80 ft building or structure height.
• Parking/storage must meet Chapter 17.188. § 17.106.010

Exterior ornamental projections may extend 2 ft into a required yard, while eaves may extend 3 ft into a required yard and 2 ft into a street-side yard, subject to the listed clearance and aggregate-length limits. Specified equipment and screen walls up to 48 in. high may encroach 4 ft into a yard setback. § 17.106.010

Planning Area 2

Planning Area 2 uses the Article VIIId framework with the stated exclusions and adds community service areas primarily for subdivision residents. Before a multifamily structure is built or a multifamily use is established, a subdivision map must be recorded and a development plan approved as referenced in the ordinance. § 17.106.020

Residential building sites require at least 2,000 sq ft. Residential lots require 15 ft front, 5 ft side, and 10 ft rear and street-side setbacks, while nonresidential uses have no setback requirement under this specific rule. § 17.106.020

The same limited projection/equipment encroachments stated for Planning Area 1 apply here. A project that needs discretionary review should also confirm the applicable design review pathway; that procedure is not established in the provided Specific Plan excerpts. § 17.106.020

Specific Plan No. 375

Planning Areas 1-21, 1-23, 2-4, 2-5 and 3-11 — Open Space–Recreation

These Open Space–Recreation areas use the Article VIIIe recreation framework with enumerated exclusions, then add a broad range of public/recreational uses. Examples include public parks and playgrounds, picnic grounds, pedestrian paseos, restaurants, cultural centers, museums, sports and recreational facilities, commercial swimming pools, golf driving ranges, athletic fields, stadiums, spas, and accessory buildings that remain incidental to a principal use. § 17.168.850

Governmental uses and facilities—including civic centers, police/fire stations, libraries, and public health/welfare offices—are also permitted. Field crops, gardening, tree crops, and propagation/culture greenhouses with on-premises sales and one unlighted 2 sq ft sign are allowed only as an interim use; before a grading permit for another use, those agricultural uses must cease. § 17.168.850

Every yard—front, side, and rear—must be at least 20 ft where a building is constructed, and multiple buildings on one lot need at least 20 ft separation. The source materials prohibit structural encroachments in these yards except as cross-referenced. § 17.168.850

For Planning Areas 1-21 and 3-11 subject to an Agricultural Preserve and/or Williamson Act contract, nonagricultural uses cannot proceed until the identified agricultural-preserve map is diminished or disestablished and the corresponding contract is no longer effective. Consult Riverside County Agricultural Zones for the separate agricultural-zone context. § 17.168.850

Planning Areas 1-24, 1-25, 1-26, 1-27, 1-28, 1-29, 1-32, 2-22 through 2-32, 3-13, 3-15, 3-17 through 3-19, 4-10, 4-11 and 5-24 — Open Space–Water

These Open Space–Water planning areas follow the Article VIIIe use framework with listed exclusions and allow interim agricultural uses comparable to the recreation group. They additionally allow boat marinas, boat/marine sales, rentals and services, and fishing/casting pools under the stated Article VIIIe.a addition. § 17.168.860

The provided source excerpt does not include the full development-standard text for this group. Not found in source materials: the numeric setback, height, lot-area, and coverage standards for these planning areas. Verify with the jurisdiction, including whether overlay districts or water-resource constraints affect the site. § 17.168.860

For identified planning areas that remain subject to Agricultural Preserves or Williamson Act contracts, agricultural uses and permitted incidental uses remain the only allowed uses until the controlling restrictions cease as described in the ordinance. § 17.168.860

Exceptions and Review Limits

Where a specific-plan chapter expressly authorizes it, development standards other than lot size, setbacks, and height may be waived or modified through a plot plan or conditional use permit if the standard is inappropriate for the proposed use and the change would not conflict with public health and safety. That authority does not permit waiver of lot size, setbacks, or height under the cited provisions. § 17.88.040; § 17.100.050; § 17.108.050

A parcel in a State Geologist delineated special-studies zone has an additional completion barrier for applicable specific-plan and permit applications: required County Ordinance No. 547 materials must be completed before the application is considered complete and processing time begins. § 17.176.010

Separate building permits and construction compliance may apply under the California Building Standards Code; those requirements are not set by the Specific Plan excerpts. Likewise, ADU eligibility and standards are not found in source materials; consult California ADU law and verify with the jurisdiction.

Checklist

• Confirm that the parcel is in unincorporated Riverside County, not an incorporated city.
• Confirm the mapped S-P designation and the exact specific plan/planning-area number. § 17.12.010; § 17.12.030
• Obtain the adopted specific plan and amendments; identify the plan’s permitted uses, conditions, special restrictions, and dimensional standards. § 17.168.040
• If the plan omits a standard, identify the zoning classification that most closely fits the assigned land use and apply that classification’s standard. § 17.168.040
• For Specific Plan No. 286, distinguish Planning Area 53 from Planning Areas 1, 3, and 6; their lot sizes and setbacks are materially different. § 17.76.010; § 17.168.405
• For Specific Plan No. 336 Planning Area 2, record the subdivision map and secure the referenced development-plan approval before establishing multifamily development. § 17.106.020
• For Specific Plan No. 375 interim-agriculture areas, confirm whether a grading permit would require agricultural uses to cease. § 17.168.850; § 17.168.860
• Check Agricultural Preserve/Williamson Act status where the planning-area rules identify it. § 17.168.850; § 17.168.860
• If seeking a modification, confirm that it does not involve lot size, setbacks, or height and that the applicable plan chapter authorizes plot-plan/CUP modification. § 17.88.040; § 17.100.050; § 17.108.050

Risks & Ambiguities

Plain-English Summary

If your property is in an unincorporated Riverside County S-P area, the answer is not simply “what does the zone allow?”—it is “which specific plan and planning area applies?” That plan’s rules control first, and the numbers can range from 2,000 sq ft lots and 5 ft side yards in one area to 20 ft yards in another. § 17.106.020; § 17.168.850

Source References

• Riverside County Zoning Code § 17.12.010 — County zone classifications, including S-P Specific Plan.
• Riverside County Zoning Code § 17.12.030 — Mapped zoning districts in unincorporated Riverside County.
• Riverside County Zoning Code § 17.168.040 — Specific-plan development standards and closest-fit zoning fallback.
• Riverside County Zoning Code § 17.76.010, § 17.76.020, § 17.76.070, and § 17.168.270 — Specific Plan No. 286 planning-area standards.
• Riverside County Zoning Code § 17.168.405 — Specific Plan No. 286 Planning Area 53 standards.
• Riverside County Zoning Code § 17.106.010 and § 17.106.020 — Specific Plan No. 336 Planning Areas 1 and 2.
• Riverside County Zoning Code § 17.168.850 and § 17.168.860 — Specific Plan No. 375 open-space planning areas.
• Riverside County Zoning Code § 17.88.040, § 17.100.050, and § 17.108.050 — Development-standard modification limits.
• Riverside County Zoning Code § 17.176.010 — Special-studies-zone application requirements.