Zoning › California › Ventura County › Oak Park

Oak Park, CA Zoning

Hybrid-pd-zoning. 6 districts · 2 overlays · 4 applicable state preemptions.

Overview

Code type
hybrid-pd
Naming convention
density-encoded

The dominant residential zone in Oak Park is RPD (Residential Planned Development), a planned-development zone where dimensional standards are established per-permit rather than fixed in the base ordinance. The RPD zone uses a density suffix encoding: 'RPD-13.14 du/ac' means 13.14 dwelling units per acre maximum. Lot area is 'as specified by permit' (§8103-0). OS zones use area-suffix encoding (OS-10 = 10 ac minimum lot). The CPD (Commercial Planned Development) zone is similarly permit-defined. This is a county ordinance governing the unincorporated Oak Park CDP — not a municipal code.

Worth knowing
  • Oak Park is an unincorporated Census-Designated Place (CDP) — it has no municipal zoning code. All land use is governed by Ventura County's Non-Coastal Zoning Ordinance (Division 8, Chapter 1). The old stub incorrectly cited Oak Park, Illinois (amlegal.com/codes/oakparkil) as the code source.
  • The RPD (Residential Planned Development) zone, which covers most of Oak Park, does not have fixed dimensional standards — lot area, height, FAR, and lot coverage are all 'as specified by permit' per §8103-0. The density suffix in the zone designation (e.g., RPD-13.14 du/ac) is the only encoded standard and represents the maximum permitted density.
  • The HCWC (Habitat Connectivity and Wildlife Corridor) overlay applies to significant portions of Oak Park, particularly the hillside and open space areas. Multiple zones carry the HCWC suffix (RPD-13.14/HCWC, RPD-4/HCWC, OS-40/HCWC, OS-160/HCWC).

+ 3 more in Quirks & notes

Districts

res_sf 4spec 1com 1
CodeNameCategory Min lotHeight CoverageFAR Du/acParking Setbacks F/S/R
RPDResidential Planned Developmentres_sf—[3]—[4]—[5]—[6]—[7]—[8]10[1] / — / 10[2]
OSOpen Spacespec435,600 sf[9]—[10]——[11]—[12]—— / — / —
CPDCommercial Planned Developmentcom—[13]—[14]——[15]——— / — / —
RERural Exclusiveres_sf217,800 sf[16]—[17]———[18]—— / — / —
RARural Agriculturalres_sf435,600 sf[19]—[20]———[21]—— / — / —
R1Single-Family Residentialres_sf6,000 sf[22]—[23]———[24]—— / — / —

Confidence: confirmed partial under review not found

Overlays

HCWC
Habitat Connectivity and Wildlife Corridors Overlay
ENV
§8109-4 Ventura County Non-Coastal Zoning Ordinance

Parcels designated as Habitat Connectivity and Wildlife Corridor (HCWC) areas on the official Ventura County zoning map. Multiple zones in Oak Park carry the HCWC suffix (e.g., RPD-13.14 du/ac/HCWC, OS-40 ac/HCWC, OS-160 ac/HCWC).

applicabilityOverlays base zoning district. Restricts or conditions development to protect biological resources, habitat connectivity, and wildlife movement corridors per the Ventura County Non-Coastal Zoning Ordinance Article 9 overlay standards.
trigger_areasApplies where shown on the Ventura County Zoning Map with HCWC suffix appended to the base zone designation.
FP-FEMA
Floodplain Management Overlay
FP
§8109-4 Ventura County Non-Coastal Zoning Ordinance; FEMA Flood Insurance Rate Maps

Areas of Special Flood Hazard as identified by FEMA on Flood Insurance Rate Maps (FIRMs) covering Ventura County unincorporated areas.

permit_requiredDevelopment in FEMA-designated Special Flood Hazard Areas requires flood hazard development permit and elevation certification.
freeboardLocal freeboard requirements apply per county flood control regulations.

State preemptions

ca-density-bonus-lawapplies
Qualifying condition
Statewide mandate (GC §65915) applies to all local agencies including counties. Ventura County (pop. 837,469, 2023 ACS 5-year) is a local agency subject to state density bonus law. Oak Park is an unincorporated CDP governed by Ventura County — County must provide density bonus on qualifying sites in RPD, CPD, and R-1 zones.
Source
California Government Code §65915; Ventura County population from Census ACS 2023 5-year estimate
Effect
County must grant density bonuses for qualifying affordable housing projects in residential and mixed-use zones including the RPD zones present in Oak Park. Up to 80% base density bonus (stackable to 100% under AB 1287); reduced parking ratios; development incentives.
ca-sb9-home-actapplies
Qualifying condition
SB 9 applies to single-family zones. Ventura County has R-1 (single-family residential) zoned parcels in Oak Park. However, Oak Park is unincorporated — Ventura County must comply with SB 9 for R-1 parcels in the unincorporated area. RPD zones are planned-development zones (not purely single-family zoning by base district) — SB 9 applicability to specific RPD parcels in Oak Park is per-parcel conditional depending on each parcel's RPD permit terms and General Plan designation.
Source
California Government Code §65852.21, §66411.7
Effect
On qualifying R-1 parcels in Oak Park, enables ministerial lot split and duplex development by-right. Caps setbacks at 4 feet; overrides local parcel size minimums.
ca-sb423-streamlinedapplies
Qualifying condition
Ventura County (the governing jurisdiction for Oak Park) has a 6th Cycle Housing Element certified In compliance (reviewed 2021-12-22 per HCD records). SB 35/423 tier for Ventura County per hcd-ca-lookup.json: tier='10%' (lower_pct_complete=132.1%, above_mod_pct_complete=78.4%, 10pct_flag=Yes, most_recent_apr_status=Successful). Subject to 10% affordability threshold for streamlined approval. Note: applies through Ventura County's housing element — unincorporated CDP Oak Park falls under county jurisdiction.
Source
CA HCD lookup (hcd-ca-lookup.json entry ventura-county-ca); GC §65913.4
Effect
Qualifying multifamily projects in RPD-designated areas of Oak Park with at least 10% affordable units may proceed through streamlined ministerial approval. Bypasses discretionary review and CEQA for qualifying projects.
ca-adu-jaduapplies
Qualifying condition
Statewide mandate applies to all residential zones including Ventura County unincorporated areas. R-1 and RPD zones in Oak Park must allow ADUs and JADUs per GC §65852.2 and §65852.22. Ventura County administers ADU ministerial approvals for unincorporated areas.
Source
California Government Code §65852.2, §65852.22
Effect
At least one ADU (up to 1,200 sf) and one JADU (up to 500 sf) must be allowed by-right on qualifying residential parcels in Oak Park. Overrides local parking and setback minimums (except 4 ft). Multiple ADUs allowed on multi-family lots.
Non-applicable laws (4)
ca-ab2097-parking-transitdoes_not_apply
Qualifying condition
Oak Park is a suburban unincorporated CDP with no qualifying major transit stop (passenger rail station, rapid transit, or high-frequency bus corridor) within 0.5 miles. Nearest transit is regional bus service; no MTS-qualifying stops verified in Oak Park area. GC §65863.2 does not eliminate parking minimums in Oak Park.
Source
CA Public Resources Code §21064.3 (major transit stop definition)
Effect
Parking minimum elimination near transit remains inapplicable in Oak Park.
ca-builders-remedydoes_not_apply
Qualifying condition
Ventura County Housing Element is certified compliant (6th Cycle, reviewed 2021-12-22, compliance_status=In per hcd-ca-lookup.json ventura-county-ca entry). Builder's Remedy requires non-compliant housing element. County compliance shields Oak Park unincorporated area from Builder's Remedy.
Source
CA HCD lookup (hcd-ca-lookup.json entry ventura-county-ca)
Effect
Builder's Remedy inactive for Ventura County unincorporated areas including Oak Park.
ca-sb10-local-upzoningdoes_not_apply
Qualifying condition
Ventura County has not adopted an SB 10 resolution for Oak Park or any unincorporated area. SB 10 is a local-option upzoning tool — requires affirmative adoption by the local agency (Board of Supervisors for unincorporated areas).
Source
California Government Code §65913.5
Effect
None. No SB 10 upzoning adopted in Oak Park.
ca-ab2011-affordable-housing-high-roaddoes_not_apply
Qualifying condition
AB 2011 provides by-right ministerial approval for multifamily housing on commercially-zoned parcels along corridors. Oak Park has CPD-zoned commercial areas, but AB 2011 requires parcels be on a commercial corridor and meet specific corridor criteria (GC §65912.100 et seq.). Oak Park's CPD areas are limited suburban shopping center nodes — not high-frequency transit corridors. Applicability not confirmed without parcel-level corridor analysis. Recording as does_not_apply pending parcel-level verification.
Source
California Government Code §65912.100 et seq.
Effect
Not established to apply without parcel-level corridor analysis.

Adopted building codes

Statewide mandatory minimum

IBC
2024 CBC
IRC
2024 CRC
NEC
2023
IFC
2024
IECC (Residential)
2024 CALGreen
IECC (Commercial)
2024 CALGreen

Click a code label to open its state-by-state adoption atlas.

Quirks & notes

  • Oak Park is an unincorporated Census-Designated Place (CDP) — it has no municipal zoning code. All land use is governed by Ventura County's Non-Coastal Zoning Ordinance (Division 8, Chapter 1). The old stub incorrectly cited Oak Park, Illinois (amlegal.com/codes/oakparkil) as the code source.
  • The RPD (Residential Planned Development) zone, which covers most of Oak Park, does not have fixed dimensional standards — lot area, height, FAR, and lot coverage are all 'as specified by permit' per §8103-0. The density suffix in the zone designation (e.g., RPD-13.14 du/ac) is the only encoded standard and represents the maximum permitted density.
  • The HCWC (Habitat Connectivity and Wildlife Corridor) overlay applies to significant portions of Oak Park, particularly the hillside and open space areas. Multiple zones carry the HCWC suffix (RPD-13.14/HCWC, RPD-4/HCWC, OS-40/HCWC, OS-160/HCWC).
  • Ventura County GIS zoning layer (WatershedCoalitionProject/MapServer/31) is county-wide and serves as the authoritative GIS source. The previously listed GIS endpoint (maps.simivalley.gov) was from the City of Simi Valley — wrong jurisdiction.
  • The Non-Coastal Zoning Ordinance PDF is a scanned/image-based document — full text extraction is not possible via automated tools. Municode mirror is blocked by Cloudflare (HTTP 403). Development standards beyond RPD minimum setbacks (§8109-1.2.2: 10 ft front/rear; 20 ft garage entrance) are partial pending text retrieval.
  • Oak Park is the largest unincorporated community in Ventura County (pop. 13,898, 2020 Census). Residents have twice voted against incorporation and against annexation by Thousand Oaks.

Formulas

Definitions

density
Maximum dwelling units per net acre. For RPD zones, encoded in the zone suffix (e.g., RPD-13.14 du/ac = 13.14 du/ac max). §8103-1.3 governs suffix designators and maximum density for the RPD zone.
setback
Minimum horizontal distance from structure to property line or street right-of-way.
lot_area
For RPD and CPD zones, lot area is 'as specified by permit' per §8103-0. For OS zones, lot area is specified by the acreage suffix.

Massing explorer

Interactive 3D comparison across every district. Drag to orbit, scroll to zoom, use the slider to walk districts, and toggle applicable overlays in the right-side panel.

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Max density
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District Category Height FAR Coverage Setbacks Parking Density Min lot Overlays

Sources & references

Primary source
https://rma.venturacounty.gov/divisions/planning/county-ordinances/
retrieved 2026-06-02
Citations
  1. [1] §8109-1.2.2
  2. [2] §8109-1.2.2
  3. [3] §8103-0
  4. [4] §8109-1.2.1
  5. [5] §8109-1.2.1
  6. [6] §8109-1.2.1
  7. [7] §8103-1.3
  8. [8] §8109-1.2.2
  9. [9] §8103-0
  10. [10] §8106-1.1
  11. [11] §8106-1.1
  12. [12] n§8103-0
  13. [13] §8103-0
  14. [14] §8109-1.3
  15. [15] §8109-1.3
  16. [16] §8103-0
  17. [17] §8106-1.1
  18. [18] §8104-2.2
  19. [19] §8103-0
  20. [20] §8106-1.1
  21. [21] §8104-2.1
  22. [22] §8103-0
  23. [23] §8106-1.1
  24. [24] §8106-1.1

Research status

Publication gates

primary url presentpassedhttps://rma.venturacounty.gov/divisions/planning/county-ordinances/ — authoritative Ventura County RMA county ordinances page, not an aggregator
no aggregator citedpassedscan clean — no zoneomics, steadily, siteplanguide, propwire, zonara, or unzoned citations in record
confidence tags full formpassedAll confirmed fields carry §-citations (§8103-0, §8103-1.3, §8109-1.2.2, §8104-2.2, §8109-4). Partial fields carry p§ prefix with explicit citation and retrieval-failure note.
overlays have parameters trigger confidencepassed2 overlays (HCWC env=confirmed via GIS, FP-FEMA=partial with stated reason). Both have trigger, params, and confidence.
preempt section city specificpassed8 CA preemption laws evaluated with Ventura County-specific qualifying_condition_checked (HCD lookup for ventura-county-ca, population vintages cited, transit proximity checked). County-not-city context explicitly noted.

Data quality

45%completeness8 confirmed14 partial
Documented gaps
  • RPD zone: height limit, FAR, lot coverage not retrievable (scanned PDF, Municode blocked)
  • OS, RE, RA, R-1, CPD zones: full dimensional standards not retrievable
  • Historic/heritage overlays: not researched
  • Specific FEMA FIRM panels for Oak Park: not retrieved
  • Airport/airspace overlay: Oak Park is approximately 15 miles from Camarillo Airport; Part 77 surfaces not verified
  • Full permitted uses by zone from §8105-4: not retrievable from current sources

Verification

last_verified_at2026-06-02T00:00:00Z
verifier_specialistzoning-research-subagent
verifier_version1.0
verification_resultpartial

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