Local zoning · Kern County

Kern County — Overlay Districts

Overlay Districts under the Kern County local zoning and planning code, with the controlling citations.

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Last reviewed: July 6, 2026

Overview

In unincorporated Kern County, “combining” or overlay zoning districts layer extra rules on top of your base zone under Title 19 (Zoning). Overlays control where and how sensitive uses occur, add hazard-safety limits, or enable specialized development patterns. They never replace the base zoning; they add to it. The county’s established combining districts are listed in § 19.10.020 and include Lot Size, Precise Development, Cluster, Residential Suburban, Rural Living, Mobilehome, Wind Energy, Petroleum Extraction, Geologic Hazard, Floodplain, Floodplain Secondary, and Airport Approach Height. Scenic Corridor and Kern River Corridor overlays also appear in Title 19 as combining districts for targeted areas (§ 19.10.020; Chapters 19.73–19.76) .

Plain-English rule of thumb: In unincorporated Kern County, an overlay district adds rules to your base zone; when provisions differ, the most restrictive standard controls (§ 19.10.020) .

Use this page alongside the county’s general zoning overview, base-district details on Kern County Zoning, and countywide development standards. Where relevant, you’ll also see pointers to parking, design review, signage, nonconforming uses, and variances and exceptions. If you’re exploring a second unit, check how an overlay may interact with California ADU law.

District-by-District breakdown (unincorporated areas)

Lot Size combining district (appears as E(…), NR(…))

  • Purpose and where it applies: Lets the County set a specific minimum lot size within the Estate (E) and Natural Resource (NR) base districts. The lot-size number appears in parentheses after the base zone (e.g., “E (½ acre)”). Applied to reflect neighborhood character, compatibility, and General Plan consistency (§ 19.54.010) .
  • Typical permitted uses: Same as the base district (§ 19.54.020) .
  • Key dimensional standards: Menu of minimums—¼ acre (10,890 sf), ½ acre (21,780 sf), 1 acre, 2½ acres, 5, 10, 20, 40, 80 acres (gross or as specified), but never less than the base-zone minimum (§ 19.54.050) .
  • Notes: Setbacks, height, and other metrics default to the base district (§§ 19.54.070–.120) .

Precise Development (PD) combining district

  • Purpose and where it applies: For sites with unique conditions or near sensitive uses; ensures tailored standards. Can be combined with any base district (§ 19.56.010) .
  • Typical permitted uses: Same as base; CUPs same as base (§§ 19.56.020–.030) .
  • Key dimensional standards: Defaults to base-zone metrics for lot size, setbacks, height, and spacing; parking per Chapter 19.82 (§§ 19.56.050–.110; 19.56.100) .
  • Process tips: PD projects must meet “special development standards” in Chapter 19.08 (referenced in § 19.56.010) and will often interface with design review and development standards .

Cluster (CL) combining district

  • Purpose and where it applies: Enables innovative clustering to preserve open space and promote affordability; can combine with E, R-1, R-2, R-3, CO, C-1, C-2, CH (§ 19.58.010) .
  • Typical permitted uses: Same as the base district; same for CUPs (§§ 19.58.020–.030) .
  • Key dimensional standards: No minimum lot size; up to a 10% density increase over the applicable General Plan designation; setbacks established via the CL site plan process (§§ 19.58.050–.070) . Approvals expire in two years absent an extension (§ 19.58.160) .
  • Practical: Parking follows Chapter 19.82; signage follows base-zone rules (§§ 19.58.100–.110). Coordinate early on open-space configuration with development standards and parking .

Residential Suburban (RS) combining district

  • Purpose and where it applies: Expands permitted domestic agricultural uses in rural-residential areas. May combine with E where minimum lot is ½ net acre, and with PL where each lot is at least ½ net acre (§ 19.60.010) .
  • Typical permitted uses: Domestic agricultural activities accessory to a primary use; specific list appears in § 19.60.020 (Not found in retrieved materials for the full enumerated list) .
  • Key dimensional standards: Defaults to the base district; animal keeping is accessory and only after a primary use is established (§ 19.60.010) .

Rural Living (RL) combining district

  • Purpose and where it applies: Adds rural-living equestrian and related uses. May be applied only to General Plan map codes 5.6, 5.7, 5.8; not within ¼ mile of 5.1–5.3; not on parcels under 2 acres. Can combine with E or A-1 where the permitted lot size is 2½ acres or larger (§ 19.61.010) .
  • Typical permitted uses: Horse boarding/keeping (≤1 horse/¼ acre), riding, breeding, schools; ag accessory buildings (including limited cargo containers) (§ 19.61.020) .
  • CUPs: Equestrian establishments and higher horse counts; equestrian services and veterinary (§ 19.61.030) .
  • Key dimensional standards: Minimum lot size governed by base district but no portion may be in a base district that allows parcels under 2½ acres (§ 19.61.050) .

Mobilehome (MH) combining district

  • Purpose and where it applies: Authorizes mobilehome installations in A‑1, R‑1, E, PL, RF where combined (§ 19.62.010) .
  • Typical permitted uses: A mobilehome certified under federal standards and not older than 30 years from application date; uses of the base district (§ 19.62.020) .
  • CUPs: Mobilehomes older than 30 years; CUPs of the base district (§ 19.62.030) .
  • Key dimensional standards: Lot size/setbacks/height per base; parking per base and Chapter 19.82 (§§ 19.62.050–.100) .

Wind Energy (WE) combining district

  • Purpose and where it applies: Allows commercial or prototype wind generators in wind-resource areas while balancing safety and land-use compatibility. May only be applied to A, A‑1(20+ acres), E(20+), RF(20+), NR(20+), M‑1/M‑2/M‑3 (§ 19.64.010(B)) .
  • Typical permitted uses: Prototype and production wind turbines with accessory substations/transmission; base-district uses also continue (§ 19.64.020) .
  • Key dimensional standards: Project-specific siting/design standards apply throughout Chapter 19.64. Commercial wind farm approvals are subject to plot plan review (§§ 19.64.130–19.64.150 referenced in § 19.102.020) . Not found in retrieved materials for the specific numeric setback section.

Petroleum Extraction (PE) combining district

  • Purpose and where it applies: Enables oil/gas exploration and production in urbanized or mixed-use contexts with added safety thresholds. May be applied only to E, CO, C‑1, C‑2, CH (§ 19.66.010) .
  • Typical permitted uses: Oil/gas wells >210 feet from any existing dwelling or existing commercial building; redrilling/deepening in bore; replacement wells meeting timing/location limits; base-district uses (§ 19.66.020) .
  • CUPs: Wells within 210 feet of an existing dwelling or commercial building; CUPs of the base district (§ 19.66.030) .
  • Key dimensional standards: No drilling within 100 feet of any public street ROW (§ 19.66.070(A)); pumping units ≤80 feet tall (§ 19.66.080(B)); other development metrics per base district (§§ 19.66.070(B), 19.66.060) . Operations must meet Chapter 19.98 oil-and-gas procedures (§ 19.66.130) .

Geologic Hazard (GH) combining district

  • Purpose and where it applies: Protects areas with known/potential surface faulting, groundshaking, ground failure, landslides, etc. Applied to General Plan Map Codes 2.1, 2.2, 2.3 and other documented hazard areas (§ 19.68.010) .
  • Typical permitted uses: Base-district uses, subject to GH standards (§§ 19.68.020–.030) .
  • Key dimensional standards: Structures for human occupancy must be set back at least 50 ft from an active fault trace or 100 ft from an “inferred” or imprecisely located fault (§ 19.68.150) .

Floodplain (FP) combining district

  • Purpose and where it applies: Applies to mapped FEMA Zone A or county-identified flood-prone areas pending reclassification to FPP/FPS; adds hazard-specific limits (§ 19.70.010) .
  • Typical permitted/CUP uses: Base-district uses unless prohibited/modified; CUPs mirror base district (§§ 19.70.020–.030) .
  • Key dimensional standards: Set back ≥10 ft from the banks of any watercourse; sewage disposal systems ≥100 ft from banks (§ 19.70.070) . Development may not cumulatively increase base flood elevation by more than 1 ft (§ 19.70.130(A)) . Prohibited uses include junk/salvage storage and any use likely to raise flood hazards (§ 19.70.040) .

Floodplain Secondary (FPS) combining district

  • Purpose and where it applies: Applies to FEMA Zones AO, AH, and A1–A30 (excluding the floodway); adds standards similar to FP for lower-velocity/shallower flooding (§ 19.72.010) .
  • Typical permitted/CUP uses: Base-district uses unless prohibited/modified; CUPs mirror base district (§§ 19.72.020–.030) .
  • Key dimensional standards: Must meet floodplain engineering standards including the 1‑ft no-rise rule; additional prohibitions on uses that clog/decrease conveyance (§ 19.72.130; § 19.72.040) .

Airport Approach Height (H) combining district

  • Purpose and where it applies: Minimizes aviation hazards by regulating uses, heights, and design near public/general-use airports; implements the adopted Airport Land Use Compatibility Plan (§ 19.76.010) .
  • Typical permitted uses: Base-district uses, subject to aviation-safety limits; details in Chapter 19.76 (Not found in retrieved materials for a full permitted list).
  • Key dimensional standards: General 35‑ft height cap, unless otherwise approved; must also comply with base-zone limits (§ 19.76.080) . Lighting and surface reflectivity subject to specific design standards (§ 19.76.125) .

Scenic Corridor (SC) combining district

  • Purpose and where it applies: Protects scenic views along major highways/freeways; focuses on regulating off-site advertising signs (§ 19.74.010) .
  • Typical permitted uses: Same as base district; off-site advertising signs are not by-right (§ 19.74.020) .
  • Key dimensional standards: Off-site advertising signs require a CUP; signs must also meet Chapter 19.84 sign standards, and more restrictive conditions may be imposed (§ 19.74.030; § 19.74.070) . Coordinate with signage.

Kern River Corridor (KRC) combining district

  • Purpose and where it applies: Implements the Kern River Plan Element to preserve riparian habitat/open space, maintain the floodway, and ensure compatible access and recreation. Can combine with any base district (§ 19.73.010) .
  • Typical permitted uses: Base-district uses; CUPs mirror base (§§ 19.73.020–.030) .
  • Key dimensional standards: Minimum 90‑ft setback from the designated floodway line for most development; 35‑ft height limit within 200 ft of the floodway; other design/use limits consistent with the Plan Element (§§ 19.73.060–.070; 19.73.010) .

Quick-reference standards

Overlay What it adds or limits Where it applies A standout numeric standard Code Reference
Lot Size Sets minimum lot size inside E/NR E, NR Menu: ¼, ½, 1, 2½, 5, 10, 20, 40, 80 acres § 19.54.050
CL Clustered layouts; small lots E, R-1, R-2, R-3, CO, C-1, C-2, CH Up to 10% density increase § 19.58.060
RL Equestrian/rural uses Areas w/ GP Map Codes 5.6–5.8 ≤1 horse per ¼ acre (by-right) § 19.61.020
MH Mobilehome installations A‑1, R‑1, E, PL, RF “By-right” if ≤30 yrs old; older needs CUP §§ 19.62.020–.030
PE Oil/gas in urban/commercial contexts E, CO, C‑1, C‑2, CH CUP if within 210 ft of a dwelling/business § 19.66.030(A)
GH Fault/landslide safety Map Codes 2.1–2.3, others 50 ft from active fault; 100 ft from inferred § 19.68.150
FP Flood safety (Zone A) FEMA Zone A or Co. identified 10 ft from bank; 100 ft for septic; ≤1 ft rise §§ 19.70.070, 19.70.130(A)
FPS Flood safety (AO, AH, A1–A30) FEMA AO/AH/A1–A30 Same “≤1 ft rise” rule § 19.72.130
H Airport safety Near public/general-use airports 35‑ft height cap (unless approved) § 19.76.080
SC Scenic sign control Targeted highway corridors Off-site signs via CUP only §§ 19.74.020–.030
KRC Kern River corridor Kern River Plan area 90‑ft from floodway; 35‑ft within 200 ft §§ 19.73.060–.070

Checklist

  • Confirm your parcel’s base zone and any overlays on the official zoning map; Kern uses combining districts shown in parentheses (§ 19.10.020(B)) .
  • Read your base zone and overlay chapter(s) together; the overlay adds to base rules (§ 19.10.020(A)) .
  • If in CL or PD, scope submittal needs early (site plans, open space, tailored standards) and any interface with design review and development standards (§§ 19.58.070, 19.56.010) .
  • If in FP/FPS/KRC, verify floodway lines, setbacks, and “no-rise” engineering; expect hydrologic calculations (§§ 19.70.070, 19.70.130; 19.72.130; 19.73.060) .
  • If in GH, obtain a geological report and honor required fault setbacks (§§ 19.68.140–.150) .
  • If in PE, measure distances to nearby dwellings/commercial buildings to see if a CUP is triggered by the 210‑ft rule; check the 100‑ft street ROW setback (§§ 19.66.030(A), 19.66.070(A)) .
  • Align with parking and signage chapters; many overlays defer those rules to countywide standards (e.g., PD § 19.56.100; CL § 19.58.100) .
  • If your project involves an ADU, verify how overlay constraints (e.g., height, flood) intersect with state protections; begin with California ADU law. Not found in retrieved materials for ADU-specific overlay exemptions; Verify with the jurisdiction.

Risks & Ambiguities

Issue Why it matters What to verify
Multiple overlays on one parcel The strictest rule controls; could reduce buildable area Map all overlays; compare numeric standards and prohibited uses (§ 19.10.020)
FP vs. FPS vs. FPP Standards and prohibitions differ by flood zone FEMA mapping, county floodway line, and whether “no-rise” calcs are needed (§§ 19.70.010, 19.72.010, 19.70.130)
Oil and gas near sensitive receptors CUP trigger at 210 ft and street setback at 100 ft As-built distances to occupied buildings and ROWs (§§ 19.66.030(A), 19.66.070(A))
Fault location accuracy GH setbacks differ if a fault is “inferred” Site-specific geotechnical mapping and county approval (§ 19.68.150)
CL density/open space math Density bonus and “net” area rules affect unit counts Applicable GP/SAP density and CL density rules (§ 19.58.060)
Airport height limits vs. base zone H overlay can cap height below base-zone max ALUCP surfaces and § 19.76.080; design standards in § 19.76.125
Scenic Corridor signage Off-site signs are CUP-only and may face stricter limits SC boundary ordinance and § 19.74.030/.070

Plain-English Summary

If your property in unincorporated Kern County carries a combining (overlay) zone, expect extra rules layered onto your base zoning. Some overlays add opportunities (like clustering or rural/equestrian uses); others limit risk (like floodplain, airport height, or fault zones). Always read the overlay chapter alongside your base zone and countywide standards, then confirm setbacks, heights, and any permit triggers before drawing plans.

Source References

  • § 19.10.020 — Establishment of combining zoning districts (list of overlays)
  • Chapter 19.54 — Lot Size combining district (esp. § 19.54.050)
  • Chapter 19.56 — Precise Development (PD) combining district (esp. § 19.56.010; § 19.56.100)
  • Chapter 19.58 — Cluster (CL) combining district (esp. §§ 19.58.010, 19.58.060–.070, 19.58.160)
  • Chapter 19.60 — Residential Suburban (RS) combining district (esp. § 19.60.010; § 19.60.020)
  • Chapter 19.61 — Rural Living (RL) combining district (esp. §§ 19.61.010–.050)
  • Chapter 19.62 — Mobilehome (MH) combining district (§§ 19.62.010–.030, .050–.100)
  • Chapter 19.64 — Wind Energy (WE) combining district (§§ 19.64.010–.020; plot plan refs in § 19.102.020)
  • Chapter 19.66 — Petroleum Extraction (PE) combining district (esp. §§ 19.66.010, 19.66.020–.030, .070–.080, .130)
  • Chapter 19.68 — Geologic Hazard (GH) combining district (esp. § 19.68.150)
  • Chapter 19.70 — Floodplain (FP) combining district (esp. §§ 19.70.010, .020–.040, .070, .130)
  • Chapter 19.72 — Floodplain Secondary (FPS) combining district (esp. §§ 19.72.010–.040, .130)
  • Chapter 19.73 — Kern River Corridor (KRC) combining district (esp. §§ 19.73.010, .060–.070)
  • Chapter 19.74 — Scenic Corridor (SC) combining district (§§ 19.74.010, .020–.030, .070)
  • Chapter 19.76 — Airport Approach Height (H) combining district (esp. §§ 19.76.010, .080, .125)

Sources

Retrieved passages

  • Kern County Zoning Code (§ 25) High relevance
  • Kern County Zoning Code (§ 69) Medium relevance
  • Kern County Zoning Code (Section 19.45.030.) Medium relevance
  • Kern County Zoning Code (§ 7120.13) Medium relevance
  • Kern County Zoning Code (§ 94) Medium relevance
  • Kern County Zoning Code (§ 28) Medium relevance
  • Kern County Zoning Code (§ 7120.06) Medium relevance
  • Kern County Zoning Code (Chapter 19.58) Medium relevance
  • Kern County Zoning Code (§ 228) High relevance
  • Kern County Zoning Code (§ 229) High relevance
  • Kern County Zoning Code (§ 28) Medium relevance
  • Kern County Zoning Code (§ 73) Medium relevance
  • CBC § 300 Medium relevance
  • Kern County Zoning Code (§ 7150.02) Medium relevance
  • Kern County Zoning Code (§ 7150.08) Medium relevance
  • Kern County Zoning Code (§ 7120.02) Medium relevance
  • Kern County Zoning Code (§ 48) Medium relevance
  • Kern County Zoning Code (section shall) Medium relevance
  • Kern County Zoning Code (§ 45) Medium relevance
  • Kern County Zoning Code (section of) Medium relevance
  • Kern County Zoning Code (§ 7160.03) High relevance
  • Kern County Zoning Code (chapter is) High relevance
  • Kern County Zoning Code (chapter is) Medium relevance
  • Kern County Zoning Code (section of) Medium relevance
  • Kern County Zoning Code (§ 77) Medium relevance
  • Kern County Zoning Code (§ 245) Medium relevance

Cited sections

Frequently asked questions

What overlay districts does Kern County use in unincorporated areas?

Kern establishes combining districts for Lot Size, PD, CL, RS, RL, MH, WE, PE, GH, FP, FPS, and H; additional corridor overlays include SC and KRC. These apply on top of a parcel’s base zoning (§ 19.10.020; Chs. 19.73–19.76) .

Do I need a CUP to drill a new oil well on a parcel with the PE overlay?

If any new well would be within 210 feet of an existing dwelling or existing commercial building, a conditional use permit is required; otherwise, wells beyond 210 feet are typically permitted by right under the overlay (§ 19.66.020–.030) .

How close can I build to a mapped fault in the GH overlay?

For structures intended for human occupancy, the minimum setback is 50 feet from an active fault trace, or 100 feet if the trace is “inferred” or cannot be precisely located (§ 19.68.150) .

What floodplain setbacks should I expect in the FP overlay?

Development must stay at least 10 ft from the watercourse bank, septic systems at least 100 ft, and overall flood modeling must show no more than a 1‑ft cumulative rise in base flood elevation (§§ 19.70.070, 19.70.130(A)) .

Can I place off-site advertising signs in the Scenic Corridor (SC) overlay?

Not by right. Off-site advertising signs in the SC overlay require a conditional use permit and must meet county sign rules; stricter conditions can be imposed (§§ 19.74.020–.030, 19.74.070) .

What does the CL overlay change for a residential subdivision?

It allows clustered lots without a minimum lot size and up to a 10% increase over the General Plan’s density if the CL standards are met. Setbacks are set through the CL site plan process (§§ 19.58.050–.070) .

How does the Airport Approach Height (H) overlay limit my project?

Generally, it caps building height at 35 feet near airports unless specific approvals are granted, and it imposes lighting/reflectivity design criteria to protect flight operations (§§ 19.76.080, 19.76.125) .

Do overlays change my parking requirements?

Usually no—the overlay defers to countywide off‑street parking standards and/or base-zone rules (e.g., PD § 19.56.100; CL § 19.58.100). Check for any project-specific conditions in your approval (§§ 19.56.100, 19.58.100) .

If my parcel is in the Kern River Corridor (KRC), what are key constraints?

Plan for at least a 90‑ft setback from the designated floodway line and a 35‑ft height cap within 200 ft of that line; additional measures protect riparian/open space values (§§ 19.73.060–.070, 19.73.010) .

Can overlays stop me from building an ADU?

Overlays do not erase state ADU rights, but hazard-based limits (like flood or airport safety) can constrain placement/height. Not found in retrieved materials for ADU-specific overlay exemptions; Verify with the jurisdiction.

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