Santa Clara — Nonconforming Uses

Last reviewed: July 2, 2026

Overview

This page summarizes how the City of Santa Clara’s Zoning Code treats nonconforming uses, nonconforming structures, and nonconforming parcels under Title 18. The rules define what may continue, what must stop after abandonment or destruction, and when a Nonconforming Minor Use Permit or other approvals are required. Key rules appear in Chapter 18.90 (General Nonconforming Provisions), Chapter 18.92 (Nonconforming Structures), Chapter 18.94 (Nonconforming Uses), and Chapter 18.96 (Nonconforming Parcels). See the Zoning overview and detailed zone tables for how these rules interact with local zone development standards and parking standards. § references below are quoted as the controlling code citations; the City places the burden on the property owner to prove nonconforming status.

Note on related topics: when you start design or repair work you will need to check the City’s rules on development standards (/us/california/santa-clara/development-standards), parking (/us/california/santa-clara/parking), and sometimes design review (/us/california/santa-clara/design-review). Projects in special districts may be subject to overlay districts (/us/california/santa-clara/overlay-districts) or Downtown Form-Based rules, and ADU work may be affected by the City and state ADU rules — see ADUs (/us/california/santa-clara/adu) and the California Building Standards Code (/us/california/building-codes).

How Santa Clara’s nonconforming rules work (core points)

• The Code defines legal nonconformities for parcels, signs, structures, and uses and intends to allow lawful pre-existing conditions to continue, but to limit alteration, enlargement, re‑establishment after abandonment, or restoration after certain destruction thresholds. § 18.90.010.
• The property owner bears the burden of proving legal nonconforming status; the Director may decide on the documentation or hold an administrative hearing. § 18.90.020.
• Ordinary maintenance and repair are allowed, but structural alterations are tightly limited; minor expansions or changes may require a Nonconforming Minor Use Permit under the procedures of Chapter 18.114. §§ 18.90.040–18.90.060.
• A nonconforming use that is discontinued or abandoned for 180 continuous days loses legal nonconforming status. § 18.94.040.
• For nonconforming structures destroyed involuntarily, the Code applies a 75 percent appraised-value threshold: destruction ≥ 75% of appraised value eliminates nonconforming status; < 75% may allow restoration if reconstruction begins within 180 days and is diligently pursued. § 18.92.020.

District-by-district breakdown

Below are representative Santa Clara zones with the local purpose, typical permitted uses, key dimensional standards that matter to nonconformities, and where each zone generally applies. Quote citations point to the City’s Title 18 chapters and tables that establish those zones and standards.

R1-6L and R1-8L (Single-Family Residential building-envelope zones)

• Purpose: Provide standards for single-family neighborhoods and the historic “R-1 building envelope” approach used in lot-split/two-unit rules. Chapter 18.10 and related two-unit rules in Chapter 18.24 govern these zones. § 18.10; § 18.24.
• Typical permitted uses: Single-family dwellings, accessory structures, and specified accessory dwelling units (ADUs) subject to Chapter 18.60. § 18.10; § 18.60.
• Key dimensional standards: front/side/rear setbacks defined by the R‑1 building envelope (see Chapter 18.10); special side-yard rules for R1‑8L (e.g., one side not less than 6 ft, opposite side 9 ft, corner street-side setback larger). § 18.10.
• Where it applies: Most traditional single-family neighborhoods; rules on reconstruction reference nonconforming structure allowances (rebuild-to‑footprint policies). If a single‑family nonconforming structure is damaged, reconstruction may be permitted to the prior footprint if you meet Chapter 18.92 timelines. § 18.92.030; § 18.10.

R-2, R-3 (Lower- to mid-density multi-family)

• Purpose: Allow duplexes and small multi-family development with tailored setbacks and parking standards. See Chapter 18.10 and development tables. § 18.10.
• Typical permitted uses: Duplexes, small multi-family, some home occupations and accessory uses; ADUs per Chapter 18.60 and state ADU law. § 18.60; § 18.10.
• Key dimensional standards: reduced side setbacks (some standards allow 2 ft side setbacks for porches/stairs in R2/R3), and rules for expansions on lots with nonconforming parking (see § 18.92.040.A.1 allowing limited expansions). § 18.10; § 18.92.040.
• Where it applies: Transitional residential corridors and smaller multifamily blocks; nonconforming parking rules can directly affect allowable expansion on these parcels. § 18.92.040.

C-N (Commercial — Neighborhood), C-C (Community), C-R (Regional)

• Purpose: Neighborhood, community, and regional commercial centers with varying FAR and intensity caps. § 18.12.010.
• Typical permitted uses: Retail, restaurants, offices, limited multi-family (MUP in some commercial zones), neighborhood services; tables list per-use permit requirements (Table 2-8 / Table 2-9). § 18.12; Tables 2‑8/2‑9.
• Key dimensional standards: minimum parcel area (e.g., C‑N: 7,000 sq ft), front setbacks (typically 10 ft), and FAR caps (C‑N FAR 0.5; C‑C FAR 0.8; C‑R FAR 1.0). Development standards are in § 18.12.030 and Table 2‑9. § 18.12.030.
• Where it applies: Neighborhood shopping nodes, larger community centers, and regional retail areas. Nonconforming commercial uses that were lawfully established prior to a code change are governed by Chapter 18.94 for continuance and by Chapter 18.92 (structures) for rebuilding or expansion rules. §§ 18.94; 18.92.

MU (Mixed-Use) zones (e.g., MU-CC, MU-NC)

• Purpose: Foster mixed residential/commercial development with specific ground-floor rules (see Table 2‑11 and § 18.14.030). § 18.14.030.
• Typical permitted uses: Ground-floor retail or services, upstairs residential, offices, and amenities. Permits vary by mixed‑use subzone; some residential uses are MUP. Table 2‑11.
• Key dimensional standards: Mixed‑use development tables set height, frontage, and ground‑floor activation standards; nonconforming building elements are treated under Chapters 18.90–18.92. § 18.14.030; § 18.92.

LI (Light Industrial), LO-RD, HO-RD (Office/Research)

• Purpose: Industrial and office-research employment areas with performance standards and FAR rules. Chapter 18.16. § 18.16.
• Typical permitted uses: Manufacturing, data centers, R&D, ancillary retail and services per zone rules. § 18.16.
• Key dimensional standards: LI can allow greater heights (e.g., Data Centers up to 90 ft in LI); performance standards in Chapter 18.40 apply. § 18.16; § 18.40.
• Where it applies: Industrial parks and research campuses; nonconforming industrial buildings follow the same Chapter 18.92 rules on repair, destruction thresholds, and restoration. § 18.92.

OS (Open Space) and Special Purpose Zones

• Purpose: Preserve parks, open space corridors, and special public uses; standards summarized in Table 2‑18. § 18.18.
• Typical permitted uses: Parks, plazas, public recreational uses. § 18.18.
• Key dimensional standards: Minimum setbacks (typically 10 ft in Table 2‑18) and height limits near residential zones (e.g., 25 ft within 20 ft of R1/R2 for certain special purpose zones). Table 2‑18; § 18.18.040.

Downtown Form-Based Code (Chapter 18.26)

• Purpose: Downtown-specific form and frontage controls that sometimes supersede ordinary development‑standard approaches; check Chapter 18.26 for form‑based rules that interact with nonconformities. § 18.26.

Quick reference table — the most decision-relevant nonconforming standards

Checklist — what an applicant must satisfy (typical)

• Assemble documentary proof that the use/structure/parcel lawfully existed before the effective date or amendment (deeds, prior permits, business/utility records) for the Director’s review as required by § 18.90.020.
• Confirm whether proposed work is ordinary maintenance (allowed) or a structural/expansive change requiring a Nonconforming Minor Use Permit; if expansion, prepare Minor Use Permit materials per § 18.90.060 and Chapter 18.114.
• If the nonconforming condition involves parking or landscaping, budget for bringing additional parking or landscaping into compliance if the use/intensity changes (see § 18.98.020 and Chapter 18.38). parking rules apply.
• If reconstructing after involuntary destruction, obtain a Building Permit within the Code’s deadlines (residential: 1 year to keep rights; nonresidential: watch the 75% threshold). § 18.92.030; § 18.92.020.
• Verify whether other approvals are triggered (zoning clearance, design review, parking/landscaping, sign changes, or overlays) — see development standards, design review, and overlay districts rules.

Risks & Ambiguities

Plain-English Summary

Santa Clara lets lawfully existing uses, buildings, and lots that no longer meet current zoning rules generally continue, but the owner must prove the prior legality, may only make limited repairs or expansions without a permit, risks losing nonconforming status after 180 days of nonuse or after major destruction above a 75% threshold, and must obtain a Minor Use Permit for most enlargements; verify timelines and evidence requirements with the Planning Director. §§ 18.90.020; 18.94.040; 18.92.020; 18.90.060.

Source References

• Santa Clara Zoning Code — Chapter 18.90, General Nonconforming Provisions, including definitions, proof of status and Minor Use Permit rules: § 18.90.010 – § 18.90.060.
• Santa Clara Zoning Code — Chapter 18.92, Nonconforming Structures (continuation, destruction thresholds, allowed improvements, repairs): § 18.92.010 – § 18.92.050.
• Santa Clara Zoning Code — Chapter 18.94, Nonconforming Uses (continuation, conditional use effect, abandonment): § 18.94.010 – § 18.94.040.
• Santa Clara Zoning Code — Chapter 18.96, Nonconforming Parcels (legal building site criteria, subdivision limitations): § 18.96.010 – § 18.96.020.
• Santa Clara Zoning Code — Chapter 18.98, Other Specific Nonconforming Provisions (landscaping, parking, signs): § 18.98.010 – § 18.98.020.
• City zone chapters and development standards cited above: Chapter 18.10 (Residential zones); Chapter 18.12 (Commercial zones; Tables 2‑8/2‑9); Chapter 18.14 (Mixed-use); Chapter 18.16 (Office/Industrial); Chapter 18.18 (Special Purpose/OS); Chapter 18.24 (Two-unit/urban lot split rules); Chapter 18.26 (Downtown Form-Based Code).

Retrieved passages

• Santa Clara Zoning Code (Title 18) High relevance show source text
• Santa Clara Zoning Code (Title 18) High relevance show source text
• Santa Clara Zoning Code (Section 18.92.050) High relevance show source text
• Santa Clara Zoning Code (Article provides) High relevance show source text
• Santa Clara Zoning Code (Section 18.90.040) High relevance show source text
• CBC § 18.92.020 (Section 18.92.020) High relevance show source text
• Santa Clara Zoning Code (Article shall) High relevance show source text
• Santa Clara Zoning Code (Section 18.92.050) High relevance show source text
• Santa Clara Zoning Code (Article 5) Medium relevance show source text
• CBC § 66321 (§ 66321) Medium relevance show source text
• Santa Clara Zoning Code (chapter or) Medium relevance show source text
• Santa Clara Zoning Code (Chapter 18.66.) Medium relevance show source text
• Santa Clara Zoning Code (Chapter 18.114) Medium relevance show source text
• Santa Clara Zoning Code (Section 18.60.150) Medium relevance show source text
• Santa Clara Zoning Code (Chapter 18.142) Medium relevance show source text
• Santa Clara Zoning Code (Title 18) Medium relevance show source text

Cited sections

• Santa Clara Zoning Code — **Chapter 18.90, General Nonconforming Provisions**, including definitions, proof of status and Minor Use Permit rules: **§ 18.90.010 – § 18.90.060**. (Chapter 18.90)
• Santa Clara Zoning Code — **Chapter 18.92, Nonconforming Structures** (continuation, destruction thresholds, allowed improvements, repairs): **§ 18.92.010 – § 18.92.050**. (Chapter 18.92)
• Santa Clara Zoning Code — **Chapter 18.94, Nonconforming Uses** (continuation, conditional use effect, abandonment): **§ 18.94.010 – § 18.94.040**. (Chapter 18.94)
• Santa Clara Zoning Code — **Chapter 18.96, Nonconforming Parcels** (legal building site criteria, subdivision limitations): **§ 18.96.010 – § 18.96.020**. (Chapter 18.96)
• Santa Clara Zoning Code — **Chapter 18.98, Other Specific Nonconforming Provisions** (landscaping, parking, signs): **§ 18.98.010 – § 18.98.020**. (Chapter 18.98)
• City zone chapters and development standards cited above: **Chapter 18.10 (Residential zones)**; **Chapter 18.12 (Commercial zones; Tables 2‑8/2‑9)**; **Chapter 18.14 (Mixed-use)**; **Chapter 18.16 (Office/Industrial)**; **Chapter 18.18 (Special Purpose/OS)**; **Chapter 18.24 (Two-unit/urban lot split rules)**; **Chapter 18.26 (Downtown Form-Based Code)**. (Chapter 18.10)
• SantaClara_ZoningCode.md

• Official Santa Clara code library