Chino Hills — Nonconforming Uses

Last reviewed: July 1, 2026

Overview

The City of Chino Hills treats nonconforming uses and structures under Chapter 16.82 of the Development Code (Title 16). Key rules: a legal nonconforming use may be continued only under strict limits, cessation can terminate status, amortization schedules are set by City Council, and structural repairs/rebuilds have dollar-threshold rules—see the controlling sections below for specifics. For how nonconformities interact with district rules and dimensional standards, consult the city's Chino Hills Zoning maps and the Chino Hills Development Standards tables. § 16.82 and related PD provisions are the primary controlling text.

What the Chino Hills Development Code actually says (short guide to the controlling rules)

• Continuation: Nonconforming uses may continue through the amortization period but may not be enlarged, increased, or extended except as allowed in Chapter 16.82. § 16.82.020
• Cessation: If the nonconforming use is discontinued for 180 days or more, it loses its nonconforming status and any future use must conform. § 16.82.020.B
• Land with no building: A nonconforming use of land (no structure) may continue for up to 10 years from the date it became nonconforming, unless another provision applies. § 16.82.020.D
• Alterations: A legal nonconforming use may not be enlarged/expanded unless a Conditional Use Permit (CUP) is granted per Chapter 16.68. § 16.82.020.E.1
• Notice & Hearing: The Director mails notice and property is posted; property owners have 60 days to request a hearing after notice. § 16.82.050
• Amortization & removal schedule: The City Council establishes amortization dates by resolution; removal/alteration orders must allow at least 5 years from the order and may not be set earlier than the building’s "normal life" as determined by the Director. § 16.82.030.C.1–2
• Nonconforming structures — repair/rebuild: A damaged nonconforming structure may be reconstructed if the reconstruction cost does not exceed 75% of the appraised value at time of damage; any reconstruction should bring conformable elements into compliance where feasible. § 16.82.030.D.1–2
• Revocation & nuisance: Uses continued contrary to an order may be declared a public nuisance and can be abated; CUPs/variances and other approvals that allow nonconformity can be revoked for violations. § 16.82.100–110

District-by-district breakdown (how nonconforming rules sit beside district rules)

Note: Chapter 16.82 controls the legal treatment of nonconformities citywide. Where district-specific development standards apply to allowed uses or to how a structure would be brought into conformance, those district chapters or exhibits control. If a district item below has no district-specific nonconforming text in the retrieved materials, the entry notes that.

R‑A (Rural‑Agricultural)

• Purpose: Intended for low‑density rural/residential/agriculture development; clustering rules available. See Exhibit "B" Table 20‑1(B) for clustering standards. § 16.20 / Exhibit "B"
• Typical permitted uses: single‑family detached homes, agriculture, limited accessory uses (see Appendix A / PD rules referenced for specifics). Not all uses listed in the retrieved snippet; consult Appendix A and PD language. Not found in retrieved materials for a full use list in the snippet.
• Key dimensional standards (clustering): Minimum lot size (single‑family detached): 10,000 sf; min front setback 25 ft (primary structure); max height 35 ft; max building coverage 40% — see Table 20‑1(B). § Table 20‑1(B)
• Where it applies: PD clustering exhibits / specific R‑A mapped locations — verify with Chino Hills Zoning. Not found in retrieved materials for parcel-level mapping.

R‑R (Rural‑Residential)

• Purpose: Moderate density residential clustering; see Exhibit "B" Table 20‑1(B). § 16.20 / Table 20‑1(B)
• Typical permitted uses: single‑family detached and accessory residential uses (full use table not in retrieved snippets). Not found in retrieved materials for complete list.
• Key dimensional standards (clustering): Min lot size: 7,200 sf; min front setback 20–25 ft depending on case; max height 35 ft; min rear yard 15 ft. Table 20‑1(B)
• Nonconforming interaction: Residential structures that were conforming at construction and remain residential in a district that allows residential uses are allowed to develop consistent with approved final maps (see § 16.82.030.B.3). § 16.82.030.B.3

R‑S (Small‑lot Residential)

• Purpose & standards: R‑S requires minimum aggregate side yard totals and prohibits uniform side yard setbacks to avoid monotony; minimum separation between structures on adjoining properties is 10 ft; minimum single‑side setback of 7 ft on any lot (aggregate 20 ft). See Chapter 16.20 / PD references for detail. § 16.20.060; Chapter 16.20
• Where it applies: R‑S areas and the Small Lot Overlay District; see Chino Hills Overlay Districts for mapping. Not found in retrieved materials for parcel maps.

PD (Planned Development) / Planned Development District standards

• Purpose: PD districts are designed with project‑specific standards. Each PD may create its own permitted uses and development standards; when a PD is silent on an item, the standards from "the zoning district which is closest to the proposed use" apply. § 16.20.050
• Typical permitted uses: Set by the PD ordinance/plan; temporary uses per Appendix A may be allowed subject to Chapters 16.40 and 16.80. § 16.20.050; 16.80.010
• Key dimensional standards (minimum defaults for residential in PD): minimum lot size 7,200 sf, avg lot width 60 ft, front yard average 22 ft (no less than 20 ft), side yard aggregate 20 ft with no less than 7 ft on any single side, side‑loaded garage setbacks as low as 16 ft. § 16.20.060
• Nonconforming interaction: Because PDs establish project-specific standards, a nonconforming structure in a PD is handled under Chapter 16.82 but the PD’s final plan typically serves as the applicable zoning regulation to determine conformity. § 16.20.050; § 16.82.010

Commercial and Industrial districts (C‑N, C‑1, C‑2, M‑1, M‑2) — high‑level note

• The Development Code uses Appendix A and district chapters/appendices to list permitted/prohibited uses and standards. Temporary uses are referenced to Appendix A and Chapter 16.80. For specific permitted uses, setbacks, and lot coverage in C‑N, C‑1, C‑2, M‑1, M‑2, consult Appendix A and the district text. Appendix A / § 16.80.010 (temporary uses) are cited in the ordinance excerpts. Not found in retrieved materials: full commercial/industrial use tables in the provided snippets.

Fences & Signs

• Fences built legally before the Development Code but rendered nonconforming by the code may be exempt from amortization (i.e., treated as legal nonconforming). § 16.06.130.E
• Nonconforming signs are handled under Chapter 16.38 and must comply with that chapter's provisions. § 16.82.120

Quick reference table — most decision‑relevant nonconforming standards

Practical guidance & interpretation (plain‑English, for practitioners)

• Do not rely solely on a building’s existing footprint to decide whether a change is permitted. Even small physical changes can be disallowed if they would "intensify" a nonconformity; when in doubt, treat a proposal as needing a formal review. § 16.82.030.B
• If you plan to expand a nonconforming commercial use, assume a Conditional Use Permit will be required and that hearings/ notices will follow. § 16.82.020.E.1; § 16.82.060
• If a structure was damaged, document appraisal and repair cost estimates carefully—reconstruction over 75% of appraised value triggers stricter review or loss of the pre‑existing nonconforming allowance. § 16.82.030.D
• Expect amortization/abatement dates to be tied to a formal Council resolution — owners get notices and a 60‑day period to request hearings; the hearing body may base its amortization decision on evidence including depreciation schedules. § 16.82.050; § 16.82.060; § 16.82.070

Inline links you may need when planning work that touches nonconforming elements: consult the Chino Hills Development Standards for dimensional rules, check Chino Hills Design Review requirements if the nonconforming change might trigger design review, and review Chino Hills Parking rules where additional parking could be required. For overlay effects, see Chino Hills Overlay Districts. If you are thinking about adding an ADU to a property with nonconforming zoning elements, start with the Chino Hills ADUs guidance and then verify with the City (local ADU interactions with nonconforming conditions are not established in the retrieved Chino Hills excerpts). Also remember building code compliance is separate—check the California Building Standards Code for structural and life‑safety requirements.

Checklist — what an applicant/owner must do when they learn their property is nonconforming

• Confirm whether the use or structure has been officially identified as nonconforming by the City (Director notice). § 16.82.050
• If you receive notice, file a hearing request within 60 days if you dispute designation or want to argue for continuation/extension. § 16.82.050
• If proposing any enlargement/extension of a nonconforming use, prepare for a Conditional Use Permit and public noticing/hearing. § 16.82.020.E.1; § 16.82.060
• If a nonconforming structure is damaged, obtain an appraisal and contractor estimates to determine whether repair cost will exceed 75% of appraised value. § 16.82.030.D.1
• If a use has been inactive, check the 180‑day rule before asserting continued nonconforming status. § 16.82.020.B
• Review district standards (PD exhibits, Table 20‑1(B), etc.) to determine what “conformance” would require (setbacks, coverage, height) and whether code exceptions or variances might be needed. § 16.20.050; Table 20‑1(B)
• Consult Planning staff early if an ADU, parking change, or design review may be involved (ADU interactions not determined by the retrieved City excerpts). Verify with the jurisdiction. Not found in retrieved materials for ADU-specific local guidance in the snippets.

Risks & Ambiguities

Plain‑English Summary

Chino Hills lets legal nonconforming uses and structures continue, but they cannot be expanded, and long inactivity (over 180 days) or City Council amortization can terminate the allowance; destroyed buildings can be rebuilt only within a 75% cost threshold and must bring conformable elements into compliance where feasible. The controlling rules are in Chapter 16.82 and PD chapters where project standards have been set. § 16.82.020 – 16.82.030

Source References

• Chino Hills Development Code, Chapter 16.82 (Nonconforming Uses and Structures): § 16.82.010 – § 16.82.130.
• Chino Hills Development Code, § 16.82.020 (Nonconforming uses). § 16.82.020.
• Chino Hills Development Code, § 16.82.030 (Nonconforming structures — continuation, alterations, amortization, reconstruction). § 16.82.030.
• Chino Hills Development Code, § 16.82.050–070 (Notice, hearings, findings, appeals, recordation). § 16.82.050; § 16.82.060; § 16.82.070.
• Chino Hills Development Code, § 16.82.090–110 (recordation, revocation, public nuisance). § 16.82.090; § 16.82.100; § 16.82.110.
• Planned Development / PD district standards (minimum standards & defaults): § 16.20.050; § 16.20.060 and project exhibits.
• R‑A and R‑R clustering standards (Exhibit "B" Table 20‑1(B)): table of lot sizes, setbacks, height, coverage. Table 20‑1(B).
• Fences and legal nonconforming fences exemption: § 16.06.130.E.
• Nonconforming signs and adult businesses: § 16.82.120; § 16.82.130 (references to Chapters 16.38 and 16.46).

Retrieved passages

• Chino Hills Zoning Code (Chapter 16.68) High relevance show source text
• Chino Hills Zoning Code (§ 9.165.010) High relevance show source text
• Chino Hills Zoning Code (§ 9.165.057) High relevance show source text
• Chino Hills Zoning Code (§ 9.155.020) High relevance show source text
• Chino Hills Zoning Code (§ 9.165.052) High relevance show source text
• Chino Hills Zoning Code (§ 9.165.050) High relevance show source text
• Chino Hills Zoning Code (§ 9.165.030) High relevance show source text
• Chino Hills Zoning Code (Section 16.58.020) Medium relevance show source text
• Chino Hills Zoning Code (chapter in) Medium relevance show source text

Cited sections

• Chino Hills Development Code, Chapter **16.82** (Nonconforming Uses and Structures): **§ 16.82.010 – § 16.82.130**. (§ 16.82.010)
• Chino Hills Development Code, **§ 16.82.020** (Nonconforming uses). **§ 16.82.020**. (§ 16.82.020)
• Chino Hills Development Code, **§ 16.82.030** (Nonconforming structures — continuation, alterations, amortization, reconstruction). **§ 16.82.030**. (§ 16.82.030)
• Chino Hills Development Code, **§ 16.82.050–070** (Notice, hearings, findings, appeals, recordation). **§ 16.82.050; § 16.82.060; § 16.82.070**. (§ 16.82.050)
• Chino Hills Development Code, **§ 16.82.090–110** (recordation, revocation, public nuisance). **§ 16.82.090; § 16.82.100; § 16.82.110**. (§ 16.82.090)
• Planned Development / PD district standards (minimum standards & defaults): **§ 16.20.050; § 16.20.060** and project exhibits. (§ 16.20.050)
• R‑A and R‑R clustering standards (Exhibit "B" Table 20‑1(B)): table of lot sizes, setbacks, height, coverage. **Table 20‑1(B)**.
• Fences and legal nonconforming fences exemption: **§ 16.06.130.E**. (§ 16.06.130.E)
• Nonconforming signs and adult businesses: **§ 16.82.120; § 16.82.130** (references to Chapters 16.38 and 16.46). (§ 16.82.120)
• ChinoHills_ZoningCode.md

• Official Chino Hills code library