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Santa Cruz County — Nonconforming Uses

Nonconforming Uses under the Santa Cruz County local zoning and planning code, with the controlling citations.

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Last reviewed: July 6, 2026

Overview

In unincorporated areas of Santa Cruz County, the Zoning Ordinance allows certain legally established uses or structures to continue even if they no longer meet current zoning standards after a code or map change. These are treated as nonconforming uses or nonconforming structures under Chapter 13.10 of the County Code, the County’s zoning regulations. The framework, definitions, and permit pathways for changes to these situations are set out primarily in § 13.10.260, § 13.10.261, and § 13.10.262, with cross-references to related procedures and standards such as Chapter 18.10 (permit procedures), Chapter 13.11 (design review), and Chapter 13.16 (parking) .

The County allows a lawful use or structure to continue after a zoning change, but a nonconforming use that is not actively used for at least three of the past five years loses its legal status; after a disaster, you have three years to obtain and exercise a building permit to keep nonconforming rights (§ 13.10.261(B)(1)).

What counts as “nonconforming” in Santa Cruz County?

  • A nonconforming use is a legally established use of land or a structure that does not conform to current use and, where applicable, density standards of the zone district and/or land use designation. A nonconforming structure is not the same thing as a nonconforming use (§ 13.10.260) .
  • A nonconforming structure was lawfully built but no longer meets current setbacks, height, lot coverage, floor area ratio, distance between structures, or similar dimensional standards of its zone (§ 13.10.260) .
  • Major structural components are the foundation, floor framing, exterior wall framing, and roof framing; altering these is what counts toward “reconstruction” (§ 13.10.260) .
  • Reconstruction means modifying or replacing 65% or more of the major structural components within any consecutive five-year period (§ 13.10.260) .

Countywide rules that apply in all zone districts

  • Continuation is allowed: A lawful use existing when the zoning rules changed may continue even if it no longer conforms to today’s standards (§ 13.10.261(B)(1)) .
  • Loss of status if idle: A nonconforming use that is not in use for at least three of the past five years loses nonconforming status; the site must then meet current zoning for future use (§ 13.10.261(B)(1)) .
  • Disaster (“catastrophic event”) allowance: Nonconforming rights are retained for three years after a catastrophic event; a building permit must be obtained and exercised within that period to maintain rights (§ 13.10.261(B)(1)) .
  • Possible reinstatement: If rights are lost and no conforming use was established, a conditional use permit (CUP) may be sought to reinstate the legal nonconforming use, subject to additional findings (§ 13.10.261(B)(1), (F)) .
  • Termination for health/safety/nuisance: The Board of Supervisors may order termination of a nonconforming use after a public hearing if it’s a threat to health/safety/welfare or a public nuisance (notice required; timing tied to level of investment) (§ 13.10.261(B)(2)) .
  • Dwelling groups: Where multiple primary dwellings exist as legal nonconforming “dwelling groups,” one unit may be designated as conforming (one-time election by owner). Others remain nonconforming and follow § 13.10.261 rules (§ 13.10.261(B)(3)) .
  • Burden of proof: The owner must prove legal nonconforming status (e.g., permits, history) (§ 13.10.260(C)(1)) .
  • Parking is not the trigger: A legal use isn’t deemed nonconforming solely for lack of off-street parking or loading (§ 13.16.030(B) as cross-referenced in § 13.10.260(C)(4)) .
  • ADA/historic work excluded from “reconstruction” math: Work done solely for ADA compliance or designated historic resources doesn’t count toward the structural alteration/reconstruction thresholds (§ 13.10.260(C)(5)–(6)) .
  • Relocating a nonconforming structure generally requires a variance or minor exception, unless allowed under the catastrophic-event provisions (§ 13.10.260(C)(2), § 13.10.262(A)(6)) .
  • Other topic-specific nonconforming rules exist for signs, greenhouses, farm worker housing, recycling collection facilities, and for some industrial and overlay contexts (see District-by-District Implications below) (§ 13.10.585; § 13.10.636(C); § 13.10.631; § 13.10.658(B); § 13.10.345(A)(7)–(8); § 13.10.473) .

Permit pathways: Changing or expanding a legal nonconforming situation

Changes to a nonconforming use (use of land or of a structure)

The County uses thresholds and permit types to regulate how a nonconforming use may be improved, added to, reconstructed, or reestablished (§ 13.10.261(C); procedures for Administrative Use Permit and CUP are in Chapter 18.10) .

Action affecting a structure accommodating a nonconforming use What’s allowed Permit track Code reference
Repairs/improvements altering up to 65% of major structural components Allowed Building permit; others as applicable § 13.10.261(C)(1); Table 13.10.261-1
Conforming addition ≤50% of existing building (once per five years) Allowed Administrative Use Permit § 13.10.261(C)(1); Table 13.10.261-1
Conforming addition >50% of existing building (once per five years) Allowed Conditional Use Permit § 13.10.261(C)(1); Table 13.10.261-1
Reconstruction (≥65% of major structural components) Allowed Conditional Use Permit § 13.10.261(C)(1); § 13.10.260; Table 13.10.261-1
Reconstruction after a catastrophic event Allowed Administrative Use Permit § 13.10.261(C)(1); Table 13.10.261-1

Approval of Administrative Use Permits and CUPs for nonconforming uses must also make added findings (e.g., parking can be met per § 13.10.551, no significant impairment of General Plan goals, and protection of adjacent residences) (§ 13.10.261(F)) . These are in addition to other required reviews, such as design review, coastal permits in the Coastal Zone, or environmental/resource reviews (§ 13.10.260(C)(2)) .

Changes to a nonconforming structure (dimensional nonconformity)

For structures that don’t meet today’s setbacks/height/coverage or similar standards, the County distinguishes between ordinary structural alterations, conforming additions, and “reconstruction” (§ 13.10.262(A)) .

Action to a nonconforming structure What’s allowed Permit track Code reference
Structural alterations within five years that are not “reconstruction” Allowed Building permit (plus any other needed approvals) § 13.10.262(A)(1)
Conforming additions (do not increase nonconforming dimensions) Allowed Building permit (and, where indicated, site development permit) § 13.10.262(A)(2)
Relocation on-site Typically requires variance/minor exception unless it increases conformance Variance or Minor Exception § 13.10.262(A)(3); § 13.10.230; § 13.10.235
Reconstruction (≥65% of major structural components) Allowed Administrative Site Development Permit § 13.10.262(A)(3); § 13.10.260
Structures over a property line, in riparian corridors, or within 5 ft of an existing/planned right-of-way Alterations >50% or reconstruction trigger Administrative Site Development Permit (with limited waiver near ROW) Administrative Site Development Permit (possible waiver near ROW) § 13.10.262(A)(4), (A)(7)

Approvals for nonconforming structure permits require specific findings, including the ability to meet any additional parking demand and, where adjacent to residences, protection of light, air, solar access, privacy, and quiet enjoyment (§ 13.10.262(C)) . Procedures follow Chapter 18.10 (§ 13.10.262(B)) .

District-by-District implications for nonconforming uses

While the nonconforming framework applies countywide (§ 13.10.261(A)), certain districts and overlays have additional, district-specific rules or cross-references:

M-1 Light Industrial

  • Purpose/typical uses: Industrial and related uses (Not found in retrieved materials).
  • Unique nonconforming rule: Uses in M-1 that are not in compliance with § 13.10.345(A)(1)–(6) are deemed nonconforming and subject to § 13.10.345(A)(7)–(8) and to the countywide nonconforming standards in § 13.10.260 et seq. .
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: Unincorporated industrial areas (verify with the jurisdiction).

PR Parks, Recreation and Open Space District

  • Purpose: Preserve public park/open space lands and provide for commercial recreation, State/Federal parks, local parks, and open space management (§ 13.10.351) .
  • Typical permitted uses (inferred from purposes): Commercial recreation facilities; State/Federal park uses; local parks; open space management (§ 13.10.351) .
  • Unique nonconforming rule: Expansion of organized camps with nonconforming densities is specifically addressed at § 13.10.353(B)(3) (details not included in retrieved excerpt) .
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: Unincorporated park and open space lands identified in the County’s zoning map (verify with the jurisdiction).

P Agricultural Preservation Combining District (Overlay)

  • Purpose: Agricultural preservation combining overlay (Not found in retrieved materials).
  • Unique nonconforming rule: Modification or expansion of uses on lands with a P overlay are processed as set forth in § 13.10.473 (overlay-specific process), in addition to countywide nonconforming rules (§ 13.10.260 et seq.) .
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: Parcels in unincorporated areas mapped with the P combining designation (overlay districts); verify specific parcels.

Topic-specific nonconforming provisions that cut across districts

  • Signs: Nonconforming signs are regulated under § 13.10.585 (see signage) .
  • Greenhouses: Nonconforming greenhouses have standards at § 13.10.636(C) (typically in agricultural contexts) .
  • Farm Worker Housing: Nonconforming aspects addressed at § 13.10.631 .
  • Recycling Collection Facilities: See § 13.10.658(B) for nonconforming conditions .

Practical intersections with other local processes

  • Approvals under § 13.10.261 and § 13.10.262 are in addition to other County reviews, including Chapter 13.11 (design review), Title 16 environmental/resource protections, and Chapter 18.10 procedures (§ 13.10.260(C)(2)) .
  • For nonconforming structures modified after a disaster or in constrained locations (e.g., riparian corridors, within 5 feet of a right-of-way), the County may require an Administrative Site Development Permit with added findings to require greater conformance where feasible (§ 13.10.262(A)(7), (C)) .
  • Appeals of actions under Chapter 13.10 follow Chapter 18.10 (§ 13.10.270) .
  • ADUs on sites with nonconforming dwelling groups: The County’s ADU section references the dwelling-group rule in § 13.10.261(B)(3) when assessing ADUs on parcels with multiple units (§ 13.10.681(D)(3)(a)–(c) excerpt) . State ADU law further limits denial of ADUs due to existing nonconforming zoning conditions unless there’s a related health/safety impact (Gov. Code §§ 66322(b), 66323(c)) .

Decision-relevant standards at a glance

Topic Standard/Trigger What it means in practice Code reference
Continuation of use Lawfully established use may continue after zoning change You can keep operating a legal use even if newly nonconforming § 13.10.261(B)(1)
Loss of nonconforming status Not in use ≥3 of past 5 years Rights lapse; future use must conform or seek CUP to reinstate § 13.10.261(B)(1)
Disaster timing 3 years to obtain and exercise a building permit Keeps nonconforming rights alive after a catastrophic event § 13.10.261(B)(1)
Reconstruction threshold ≥65% of major structural components in any 5-year window Triggers “reconstruction” rules and higher permit levels § 13.10.260 (definitions)
Parking Lack of off-street parking alone doesn’t make a use nonconforming Parking shortfalls don’t erase legal status § 13.16.030(B); § 13.10.260(C)(4)
Relocation of nonconforming structure Generally requires variance/minor exception Plan early for variances/exceptions § 13.10.260(C)(2); § 13.10.262(A)(3)
Added findings (uses/structures) Parking can be met; protect light/air/privacy; General Plan consistency Expect added findings with Admin/CUP and Site Development Permits § 13.10.261(F); § 13.10.262(C)

Checklist

  • Confirm your site is in the unincorporated areas (not an incorporated city) and identify the current zone/overlay on the County’s zoning map.
  • Assemble proof the use/structure was lawfully established (permits, inspections, dated records); owner bears the burden (§ 13.10.260(C)(1)) .
  • Document continuous operation: show the use was active at least three of the past five years, or qualify under the disaster-clock rules (§ 13.10.261(B)(1)) .
  • Scope the work against thresholds: Will you alter major structural components and, if so, what percentage in five years? (§ 13.10.260) .
  • Match the correct permit path (building permit vs. Administrative Use Permit vs. CUP vs. Administrative Site Development Permit) (§ 13.10.261(C); § 13.10.262(A)–(C)) .
  • Demonstrate you can meet any added parking demand and applicable development standards in your zone (§ 13.10.261(F); § 13.10.262(C)) .
  • If in an overlay (e.g., P Agricultural Preservation) or a district with special rules (e.g., M-1), confirm any added procedures (§ 13.10.473; § 13.10.345(A)(7)–(8)) .
  • Check whether design review, coastal permits, or resource protections apply (§ 13.10.260(C)(2)) .
  • For nonconforming elements tied to a potential ADU, note local cross-references and State limits on denying ADUs for pre-existing nonconforming conditions (§ 13.10.261(B)(3); Gov. Code §§ 66322(b), 66323(c)) .
  • Confirm building permit needs with County Building (local Chapter 12.10; see also California Building Standards Code) (§ 13.10.260(C)(2)) .

Risks & Ambiguities

Issue Why it matters What to verify
Proving legal status Without proof, you cannot use nonconforming pathways Gather permits/records; confirm with Planning; owner carries burden (§ 13.10.260(C)(1))
Five-year percentage math Crossing the 65% threshold triggers “reconstruction” Work with your design team to calculate “major structural components” per County guidelines (§ 13.10.260)
Lapse of use clock Idle ≥3 of 5 years can end rights Compile operational logs; if disaster-caused, track the three-year permit window (§ 13.10.261(B)(1))
Adjacent residential sensitivities Added findings protect light, air, privacy, noise Show design mitigations; may condition approvals (§ 13.10.261(F); § 13.10.262(C))
Relocation to “fix” nonconformity Often requires variance or minor exception Explore feasibility of greater conformance vs. variance (§ 13.10.262(A)(3), (A)(7))
Overlay/district carve-outs Industrial, PR, and P-overlay have add-ons Check M-1, PR, and P-overlay provisions (§ 13.10.345(A); § 13.10.353(B)(3); § 13.10.473)
Parking May be an approval finding Confirm you meet any added parking per § 13.10.551 (cross-referenced in findings)
Appeals and timing Missed deadlines or incorrect track delay projects Note Chapter 18.10 procedures; appeals per § 13.10.270

Plain-English Summary

If you own a property in unincorporated Santa Cruz County with a use or building that no longer fits today’s zoning, you can usually keep it and sometimes improve it. The County sets bright lines for when a change becomes “reconstruction,” how long a nonconforming use can sit idle, what permits are needed for additions or rebuilds, and what extra findings you must meet—especially near homes or in sensitive locations. Plan early around the 65% structural threshold, the three‑of‑five‑years activity rule, and any district/overlay-specific add-ons.

Source References

  • SCCC § 13.10.110 (Title; Zoning Ordinance)
  • SCCC § 13.10.140 (Applicability; conformance; exceptions for nonconformities)
  • SCCC § 13.10.260 (Definitions; general nonconforming provisions)
  • SCCC § 13.10.261 (Nonconforming uses; continuation, lapse, permit thresholds, findings)
  • SCCC § 13.10.262 (Nonconforming structures; thresholds; site development permits; findings)
  • SCCC § 13.10.270 (Appeals via Chapter 18.10)
  • SCCC § 13.16.030(B) (Parking—nonconforming status)
  • SCCC § 13.10.345(A)(7)–(8) (M-1 Light Industrial—nonconforming uses)
  • SCCC § 13.10.351; § 13.10.353(B)(3) (PR—purposes; organized camps with nonconforming densities)
  • SCCC § 13.10.473 (P Agricultural Preservation Combining District procedures)
  • SCCC § 13.10.585 (Nonconforming signs)
  • SCCC § 13.10.631 (Farm worker housing—nonconforming provisions)
  • SCCC § 13.10.636(C) (Nonconforming greenhouses)
  • SCCC § 13.10.658(B) (Recycling collection facilities—nonconforming provisions)
  • SCCC § 13.10.681(D) (ADUs—references to dwelling groups/nonconforming density)
  • State ADU law (nonconforming zoning conditions and ADUs), Gov. Code §§ 66322(b), 66323(c) (HCD 2025 ADU Handbook)
  • For County planning context, see: Santa Cruz County zoning & planning overview, Land Use, Development Standards, Overlay Districts, Historic Preservation.

Sources

Retrieved passages

  • CBC § 13.10.345 (Chapter 11) High relevance
  • CBC § 261 (section and) High relevance
  • Santa Cruz County Zoning Code (§ 13.10.345) High relevance
  • Santa Cruz County Zoning Code (chapter and) High relevance
  • Santa Cruz County Zoning Code (section are) High relevance
  • Santa Cruz County Zoning Code (section is) High relevance
  • Santa Cruz County Zoning Code (chapter and) High relevance
  • Santa Cruz County Zoning Code (chapter but) High relevance

Cited sections

Frequently asked questions

How long can a legal nonconforming use sit idle before I lose my rights in unincorporated Santa Cruz County?

If a nonconforming use is not in use for at least three of the past five years, it loses its legal status and future use must conform—or you must seek a CUP to reinstate it (§ 13.10.261(B)(1)) .

Can I rebuild a nonconforming house after a fire in the unincorporated areas?

Yes. Nonconforming rights are retained for three years after a catastrophic event. You must obtain and exercise a building permit within that window to keep the rights (§ 13.10.261(B)(1)) .

What permit do I need to reconstruct a nonconforming structure?

Reconstruction—defined as modifying or replacing 65% or more of major structural components in any five years—requires an Administrative Site Development Permit (§§ 13.10.260; 13.10.262(A)(3)) .

Can I add onto a building that contains a nonconforming use?

Yes, but thresholds apply. Conforming additions up to 50% (once per five years) typically need an Administrative Use Permit; larger conforming additions or reconstruction need a CUP (§ 13.10.261(C); Table 13.10.261-1) .

Does a parking shortfall make my use “nonconforming”?

No. A legal use is not deemed nonconforming solely due to lack of off-street parking or loading (§ 13.16.030(B) cross-referenced in § 13.10.260(C)(4)) .

Can the County make me shut down a long-standing nonconforming business?

Possibly. The Board of Supervisors may order termination after a public hearing if the use threatens public health/safety/welfare or is a public nuisance; the timeline depends on your investment and whether it can be used for a conforming use (§ 13.10.261(B)(2)) .

How do nonconforming “dwelling groups” affect adding an ADU?

If multiple dwellings exist as a nonconforming “dwelling group,” one unit can be deemed conforming. Local ADU provisions reference this rule, and State law limits denial of ADUs for existing nonconforming conditions unless there’s a related safety issue (§ 13.10.261(B)(3); Gov. Code §§ 66322(b), 66323(c)) .

I’m near a right-of-way or riparian corridor—are there extra steps?

Yes. Alterations or reconstruction of nonconforming structures located over a property line, in riparian corridors, or within five feet of a right-of-way often require an Administrative Site Development Permit with findings to move toward greater conformance (§ 13.10.262(A)(4), (A)(7), (C)) .

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