Local zoning · Kern County

Kern County — Nonconforming Uses

Nonconforming Uses 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 areas of Kern County, “nonconforming” status addresses uses, structures, lots, and signs that were lawful when established but no longer meet current rules in the Kern County Zoning Ordinance (Title 19). Chapter 19.108 sets out when such uses may continue, when they must cease, and whether they can be repaired, rebuilt, or expanded. This page distills those rules and shows how they apply across the County’s base zoning districts, with clear pointers to the controlling sections.

Key rule in plain English: A legal nonconforming use or structure can continue in unincorporated Kern County, but it generally cannot be expanded; if it stops for one year (or two years where the site’s improvements exceed $50,000 in assessed value), the nonconforming right ends. See § 19.108.030 and § 19.108.040.

What “nonconforming” means under Title 19

  • Definitions:

    • A nonconforming building is a structure that met the rules when built but no longer meets size, dimension, or location standards of today’s district. See § 19.04.498.
    • A nonconforming lot is a legally created lot that no longer meets current lot standards. See § 19.04.501.
    • A nonconforming use is a land use that was lawful but no longer conforms to current district permissions. See § 19.04.504.

  • Purpose statement: Nonconformities are declared incompatible with current zoning; they cannot be enlarged, expanded, or extended except as specifically allowed in Chapter 19.108. See § 19.108.010.

Core rules you will actually use

  • Nonconforming structures

    • May be continued and maintained, but not enlarged in area, space, or volume. See § 19.108.020(A)–(B).
    • If damaged by fire, earthquake, explosion, or act of God, may be rebuilt if the repair/rebuild cost does not exceed 150% of the building’s actual cash value at the time of damage, with no expansion, and work must start within one year. See § 19.108.020(D).
    • If rendered nonconforming by later changes to yard/setback rules, the building may be reconstructed at the same location with no greater nonconformity; the Planning Director may also authorize up to a 50% expansion if no greater setback encroachment, no significant use change, no significant height change, and all safety codes are met. See § 19.108.020(E)–(G).

  • Nonconforming uses of structures

    • May continue, but the area/space/volume devoted to the nonconforming use may not increase. See § 19.108.030(A).
    • If changed to a conforming use, the nonconforming use cannot resume. See § 19.108.030(B).
    • Discontinuance/abandonment for 1+ years ends the right; if the property’s improvements have an assessed value over $50,000, the cutoff is 2+ years. See § 19.108.030(C).
    • A nonconforming use in a building may be changed to a similar or less intense nonconforming use if only minor structural changes are needed. See § 19.108.030(D).

  • Nonconforming uses of land (no building or minimal structures)

    • No expansion, extension, or intensification—unless the Planning Commission approves after a public hearing with mailed notice to owners within 300 feet and specific findings that expansion won’t create significant adverse impacts and that zoning conformity would otherwise require a General Plan amendment. See § 19.108.040(A).
    • May not be changed to any other use except one that is permitted in the zoning district. See § 19.108.040(B).
    • Discontinuance/abandonment triggers the same 1-year (or 2-year if assessed improvements exceed $50,000) cutoff. See § 19.108.040(C).

  • Special, sector-specific nonconforming provisions

    • Oil, gas, or other hydrocarbon activities lawfully constructed before April 7, 2021 are treated as nonconforming uses of land; subsequent operations are allowed subject to Chapter 19.98. See § 19.108.040(D).
    • A legal nonconforming dwelling in any zone may be replaced with Planning Director approval if all other Title 19 requirements (other than density or conditional use permit requirements) can be met. See § 19.108.040(E).
    • A use continuously in existence 20+ years may qualify as legal nonconforming if the Planning Director finds it is not significantly incompatible and does not pose significant health/safety/welfare risks. See § 19.108.040(F).

  • Nonconforming lots and setbacks

    • A legally recorded lot predating Title 19 may be used for permitted uses in its zoning district if all yard and setback requirements are met; such substandard lots can be enlarged by land division if the lot gets larger and no resulting lot is rendered substandard for its map code and zone. See § 19.108.050.
    • Uses with nonconforming setbacks may be replaced in the same location if destroyed by calamity regardless of cost, and may be maintained so long as the nonconformity does not increase. See § 19.108.060.

  • Nonconforming signs

    • Generally allowed to continue for five years, then deemed illegal and a public nuisance if not brought into conformance; alterations are limited to like-for-like structural repair. See § 19.108.070.

  • Proving your status and appeals

    • The applicant bears the burden to document legal nonconforming status; the Planning Director issues a determination (appealable to the Board of Supervisors). See § 19.108.080–.090.

For context on districts and permitted uses, see the County-wide Kern County Zoning and Kern County Land Use pages. Related process topics include Kern County Design Review, Kern County Parking, and Kern County Variances and Exceptions.

Quick-reference table: common nonconforming standards

Topic What Kern County allows/prohibits Triggers/thresholds Who decides Code Reference
Continue a nonconforming structure Allowed to continue/maintain; no enlargement in area/space/volume Ongoing occupancy/use — § 19.108.020(A)–(B)
Rebuild after damage Rebuild if cost ≤ 150% of ACV; begin within 1 year; no expansion Calamity damage; valuation test — § 19.108.020(D)
Setback nonconformity—rebuild/expand Rebuild in same location (no cost cap); Planning Director may allow ≤50% expansion if no greater encroachment and other limits Nonconformity due to setback changes Planning Director (for the ≤50% expansion) § 19.108.020(E)–(G)
Continue nonconforming use of a structure Allowed; no enlargement of area/space/volume Ongoing use — § 19.108.030(A)
Discontinuance/abandonment cutoff 1 year, or 2 years if assessed improvements > $50,000 Lapse of use — § 19.108.030(C), § 19.108.040(C)
Expand a nonconforming use of land Only if Planning Commission finds no significant adverse impacts and GP amendment is the only other remedy; mailed notice to 300 ft Discretionary expansion Planning Commission § 19.108.040(A)
Replace legal nonconforming dwelling Allowed if all other Title 19 requirements (except density/CUP) can be met Dwelling replacement Planning Director § 19.108.040(E)
Nonconforming lot use and enlargement Use allowed if setbacks met; may enlarge lot if it gets bigger and no new substandard lots result Land division — § 19.108.050
Nonconforming signs 5-year amortization; then illegal/nuisance; only like-for-like structural repair Time since nonconformity — § 19.108.070
Establish legal nonconforming status Applicant must document; PD determination; appeal to Board Application/appeal windows Planning Director/Board § 19.108.080–.090

Note: State ADU law limits how local agencies can condition ADU permits on fixing existing nonconforming zoning conditions; see our California ADU law page for those exceptions (Gov. Code §§ 66322–66323 as summarized in HCD’s 2025 handbook).

District-by-district application in unincorporated areas

The nonconforming rules above apply countywide across all base districts. Below are practical, district-specific notes on how they most commonly arise. For allowed uses and dimensional standards within each district, see Kern County Zoning and Kern County Development Standards. Where district-specific metrics are not in the retrieved materials, it is noted.

A (Agricultural)

  • Purpose/typical uses: Not found in retrieved materials.
  • Nonconforming patterns: Older farm accessory buildings or yard encroachments often rely on the setback provisions for reconstruction and limited expansion under § 19.108.020(E)–(G).
  • Key dimensional standards: Not found in retrieved materials.
  • Where applied: Widely mapped in rural unincorporated areas; Verify with the jurisdiction.

E, R-1, R-2, R-3 (Estate and Residential)

  • Purpose/typical uses: Not found in retrieved materials.
  • Nonconforming patterns: Replacement of legal nonconforming dwellings is allowed with Planning Director approval if other Title 19 standards are met, other than density/CUP requirements, per § 19.108.040(E). Setback rebuilds are allowed in-place, and maintenance is allowed if nonconformity does not increase, per § 19.108.060.
  • Key dimensional standards: Not found in retrieved materials.
  • Where applied: Unincorporated neighborhoods and communities; Verify with the jurisdiction.

C-1, C-2, CH (Commercial/Highway Commercial)

  • Purpose/typical uses: Not found in retrieved materials.
  • Nonconforming patterns: Continuing nonconforming uses of structures without expansion (§ 19.108.030(A)) and the five-year amortization for nonconforming signs (§ 19.108.070) are frequent issues during tenant changes or facade updates.
  • Key dimensional standards: Not found in retrieved materials.
  • Where applied: Commercial corridors and highway-oriented nodes; Verify with the jurisdiction.

M-1, M-2, M-3 (Industrial)

  • Purpose/typical uses: Not found in retrieved materials.
  • Nonconforming patterns: Limitations on expanding legacy operations that became nonconforming after zoning changes; expansions of nonconforming land uses need Planning Commission approval with the specific findings and 300-foot mailed notice in § 19.108.040(A).
  • Key dimensional standards: Not found in retrieved materials.
  • Where applied: Industrial districts in unincorporated areas; Verify with the jurisdiction.

RF, NR (Recreation-Forestry; Natural Resource)

  • Purpose/typical uses: Not found in retrieved materials.
  • Nonconforming patterns: Resource-related sites occasionally implicate the special oil/gas nonconforming rule in § 19.108.040(D) (for operations lawfully constructed before April 7, 2021).
  • Key dimensional standards: Not found in retrieved materials.
  • Where applied: Resource and open-space areas in unincorporated Kern; Verify with the jurisdiction.

For overlay or special-case contexts, see Kern County Overlay Districts and Kern County Historic Preservation. If you need relief from strict dimensional rules while converting to a conforming use, consult Kern County Variances and Exceptions. Sign changes should reference Kern County Signage.

Checklist

  • Confirm the parcel is in the unincorporated area and identify the base district and any overlays. See Kern County zoning & planning overview.
  • Determine what is nonconforming (use, structure, lot, or sign) using Title 19 definitions (§§ 19.04.498, 19.04.501, 19.04.504).
  • Compile proof the use/structure/lot/sign was lawful when established to support a legal nonconforming claim (§ 19.108.080).
  • Check if the nonconforming use was discontinued for 1+ years (or 2+ years where improvements exceed $50,000 assessed value) (§§ 19.108.030(C), 19.108.040(C)).
  • If proposing repairs/rebuilds, confirm eligibility and thresholds (e.g., 150% ACV cap for structures; in-place rebuilds for nonconforming setbacks) (§§ 19.108.020(D), 19.108.060).
  • If seeking to expand a nonconforming use of land, prepare a Planning Commission application addressing the two required findings and 300-foot mailed notice (§ 19.108.040(A)).
  • For signs, plan for five-year amortization or pursue compliance (§ 19.108.070).
  • Track appeal windows (7-day appeal of PD determinations; Board is final) (§ 19.108.080–.090).
  • Coordinate any site upgrades with applicable Kern County Development Standards, Kern County Parking, and Kern County Design Review. Title 24 items belong on the California Building Standards Code page.

Risks & Ambiguities

Issue Why it matters What to verify
1-year vs 2-year discontinuance Crossing the cutoff terminates nonconforming status Assessed value of improvements and precise inactivity dates (§§ 19.108.030(C), 19.108.040(C))
150% ACV rebuild cap Exceeding the cap breaks eligibility to rebuild a nonconforming structure Valuation method and timing; commence within 1 year (§ 19.108.020(D))
“Similar or less intense” use changes Some changes may be allowed even if still nonconforming Whether only minor structural alterations are required (§ 19.108.030(D))
Setback expansions up to 50% Limited pathway to add area without a variance No greater encroachment; no significant use/height change; safety codes met (§ 19.108.020(G))
Expansion of nonconforming land use Requires Commission findings and mailed notice Impact analysis and General Plan conformance remedy (§ 19.108.040(A))
Oil/gas “grandfathering” cut-off Post-4/7/2021 facilities not covered Facility establishment date; Chapter 19.98 compliance (§ 19.108.040(D))
20-year recognition path Discretionary; not automatic Evidence of continuous use and compatibility findings (§ 19.108.040(F))
Sign amortization After 5 years, sign becomes illegal/nuisance Date the sign became nonconforming and abatement pathway (§ 19.108.070)

Plain-English Summary

If your property in unincorporated Kern County has something built or used under old rules, you can usually keep it as-is, but you can’t make it bigger. If you stop the nonconforming use for a year (or two years for higher‑value improved sites), you lose the right to restart it. Repairs and certain rebuilds are allowed within clear limits, some setback encroachments can be rebuilt in place, and specific discretionary paths exist to expand a nonconforming land use. Signs get five years before they must comply.

Source References

Information Gaps

  • District purpose statements, typical permitted uses, and key dimensional standards for each base district: Not found in retrieved materials.
  • Geographic description of where each district is commonly mapped: Not found in retrieved materials.

Sources

Retrieved passages

  • Kern County Zoning Code (§ 108) High relevance
  • Kern County Zoning Code (Section 19.102.150) High relevance
  • Kern County Zoning Code (Chapter 19.98) High relevance
  • Kern County Zoning Code (§ 7288.04) High relevance
  • CFC § 7296.01 (§ 7296.01) High relevance
  • Kern County Zoning Code (Section 19.08.090) High relevance
  • Kern County Zoning Code (Chapter 19.100) High relevance
  • Kern County Zoning Code (§ 7280.02) High relevance

Cited sections

Frequently asked questions

Can I expand a legal nonconforming business in unincorporated Kern County?

Generally no. Expansion of the area, space, or volume devoted to a nonconforming use of a structure is prohibited (§ 19.108.030(A)). Limited changes to a similar or less intense nonconforming use may be allowed if only minor structural alterations are needed (§ 19.108.030(D)).

What happens if a nonconforming use stops for a period in Kern County?

If discontinued or abandoned for one year, the nonconforming right ends. Where the property’s improvements have an assessed value over $50,000, the cutoff is two years (§§ 19.108.030(C), 19.108.040(C)).

Can I rebuild a nonconforming building after a fire in an unincorporated area?

Yes, if the repair/rebuild cost does not exceed 150% of the building’s actual cash value at the time of damage, there is no expansion, and reconstruction begins within one year (§ 19.108.020(D)).

I have a house that doesn’t meet today’s setbacks. Can I replace or expand it?

A legal nonconforming dwelling can be replaced with Planning Director approval if all other Title 19 requirements (except density/CUP) are met (§ 19.108.040(E)). Buildings nonconforming only by setbacks may be rebuilt in the same spot and, in some cases, expanded up to 50% with no greater encroachment (§ 19.108.020(E)–(G); § 19.108.060).

Can a nonconforming land use be expanded if I analyze impacts?

Possibly. The Planning Commission may authorize expansion/intensification of a legal nonconforming land use after a noticed public hearing if it finds no significant adverse impacts and that conformity would otherwise require a General Plan amendment (§ 19.108.040(A)).

How long can my nonconforming sign stay?

Five years from when it became nonconforming. After that, it’s considered illegal and a public nuisance unless brought into compliance; only like-for-like structural repairs are allowed (§ 19.108.070).

Do oil and gas operations have special nonconforming rules in Kern County?

Yes. Oil, gas, or hydrocarbon activities lawfully constructed before April 7, 2021 are treated as nonconforming uses of land, with subsequent operations allowed subject to Chapter 19.98 (§ 19.108.040(D)).

How do I prove my use is legally nonconforming?

Submit documentation to the Planning Director; the burden of proof is on the applicant. Determinations can be appealed to the Board of Supervisors within seven days (§ 19.108.080–.090).

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