Rancho Mirage — Nonconforming Uses

Last reviewed: July 2, 2026

Overview

This page explains how the City of Rancho Mirage treats nonconforming uses, nonconforming structures, and nonconforming sites under the Rancho Mirage Zoning Ordinance (Title 17). The rules control continuation, repair, redevelopment, and when nonconformity is lost; development that affects a nonconformity generally requires discretionary review. For specific development standards (setbacks, lot coverage, height, parking) consult the city’s tables in Division II and Division III of the zoning code. Rancho Mirage Zoning is established by Section 17.06.010 and its district tables and standards (see Table 2‑1 and related development standards) .

Note: when this page mentions technical topics you will commonly need, the first mention links to the city pages for that topic (parking, setbacks/development standards, design review, overlays, ADUs, and the state building code) so you can jump to more details.

Chapter 17.70 (Nonconforming Uses, Sites and Structures) is the central control for nonconformities in Rancho Mirage. Key themes from Chapter 17.70: definitions and purpose (§ 17.70.010–020), strict limits on change or expansion (§ 17.70.030–040), damage/demolition thresholds (1/2 replacement cost) and requirement to conform if damage exceeds that threshold (§ 17.70.040.A, § 17.70.050.A) , prohibition on building permits to continue nonconforming uses once they are no longer allowed (§ 17.70.060) and specific exceptions for lots, setbacks, parking/garages, and lot coverage (§ 17.70.100) .

How the code defines the categories

• Nonconforming site — a legally improved parcel (landscaping, parking, etc.) that does not meet current district standards (§ 17.70.020) .
• Nonconforming structure — a lawfully constructed building that fails to meet current dimensional requirements (open space, distance between structures, etc.) (§ 17.70.020) .
• Nonconforming use — a lawfully established land use that is not allowed under current use rules for its zoning district (§ 17.70.020–030) .

(If a property became nonconforming after annexation from unincorporated territory, it is treated as a "nonconformity upon annexation" under the same chapter) .

District-by-district breakdown

The zoning districts for Rancho Mirage are listed in Table 2‑1 (Division II, Chapter 17.06.010) and include the residential, commercial/industrial, institutional and overlay districts. Where the zoning code provides district-specific development standards or tables those sections are cited below. Verify parcel-specific standards with the Planning Department and the zoning map .

Note: where I cite district development standards below I link to the city’s development-standards summary when I first use the word setbacks; see the code citations for the controlling tables.

HR — Hillside Reserve

• Purpose: preserve large hillside and open space lots, very low density. District established in Table 2‑1 (§ 17.06.010) .
• Typical permitted uses: very low density single‑family residential and open space uses (see Table 2‑2 and applicable residential use lists) .
• Key dimensional notes: minimum parcel size is very large (HR listed as 1 du/640 acres in Table 2‑3); consult § 17.08.020 and Table 2‑3 for parcel/ setback standards (front setback 25 ft, side 10 ft. appear in Table 2‑3) .
• Where it applies: hillside areas as shown on the zoning map; nonconforming hillside structures that are damaged ≥50% of replacement cost must be reconstructed to conform (§ 17.70.040.A) .

R‑E — Residential Estate

• Purpose: large-lot single-family estates; low density (§ 17.06.010, Table 2‑1) .
• Typical uses: single-family homes, accessory structures, guest/employee quarters subject to § 17.30.195 .
• Standards: see Table 2‑3 for minimum parcel sizes, setbacks (front 25 ft, side 10 ft.) and maximum densities; nonconforming side setbacks of ≥5 ft may continue under the code's exception (minor variance applicable) § 17.70.100.B.1 .

R‑L‑2, R‑L‑3 — Residential Very Low & Low Density

• Purpose: modest single‑family neighborhoods with defined lot size minimums (§ 17.06.010, Table 2‑1) .
• Typical uses: single‑family dwellings, accessory dwelling units (see ADU rules), pools, private recreation; permit tables define which accessory uses are permitted/conditional (§ 17.30 series) .
• Standards: Table 2‑3 gives minimum parcel sizes, front setback 25 ft, side setbacks 10 ft, lot coverage maximums and minimum private outdoor living space; nonconforming front/rear setbacks may use setback averaging via a minor conditional use permit (§ 17.70.100.B.2) .
• Note on ADUs: the city regulates ADUs in § 17.30.200 but state ADU law may limit a city's ability to require correction of zoning nonconformance for an ADU — verify with the jurisdiction and state ADU rules .

R‑M, R‑H — Residential Medium & High Density

• Purpose: multifamily and higher‑density housing (Table 2‑1) .
• Typical uses: multifamily apartments, condominiums, senior housing (S‑OL overlay may apply) and related accessory uses; see the use table and standards in Chapters 17.08 and 17.30 .
• Standards: Table 2‑3 and Chapter 17.30 set minimum unit areas and density limits; nonconforming multifamily structures damaged above the 50% threshold must be brought into conformity (§ 17.70.040.A–B) .

MHP — Mobile Home Park

• Purpose: mobile home parks and manufactured housing consistent with density ranges in Table 2‑1 (§ 17.06.010) .
• Typical uses and standards: see the mobile home park standards and residential accessory standards (§ 17.30 and Tables) .
• Nonconforming issues: repairs, replacement or redevelopment that expand intensity will be subject to the nonconforming use rules (no increase in intensity allowed) (§ 17.70.030.A, C) .

C‑N, C‑G, C‑C — Neighborhood, General, Community Commercial

• Purpose: commercial centers of varying scale; see Table 2‑1 and Chapters 17.10 / 17.12 for district standards (§ 17.06.010, § 17.12.030) .
• Typical uses: retail, restaurants, professional offices, hotels (Resort Hotel zone separate), services; uses are set in the allowable uses tables (Table 2‑2 for residential zones and equivalent commercial use tables) .
• Standards & nonconforming signs: sign and parking nonconformities are handled by their respective chapters; nonconforming signs have abatement schedules in § 17.28.160 and nonconforming parking/lot improvements are addressed in Chapter 17.26 (§ 17.26.030) .
• Nonconforming commercial redevelopment that expands intensity or area is prohibited unless authorized through the conditional-use pathway described in Chapter 17.70 (§ 17.70.030.C) .

O — Office Commercial; M‑U — Mixed Use; Rs‑H — Resort Hotel

• Purpose and typical uses are listed in Table 2‑1 and respective chapters; mixed‑use and resort hotel projects may have special permit requirements (development plan permits, conditional use permits) and are subject to the nonconforming provisions if altered (§ 17.06.010, Chapters 17.42, 17.48) .

I‑L — Light Industrial

• Purpose: light industrial and service uses; nonconforming industrial structures must comply with Chapter 17.70 when considering expansion or repair (§ 17.70.040–050) .

P — Institutional

• Purpose: public buildings, schools, hospitals; Chapter 17.12 lays out development standards for P (setbacks front 25 ft, side 10 ft, rear 20 ft, height limits noted in § 17.12.030) .
• Nonconforming institutional uses that are discontinued >180 days lose status (§ 17.70.050.C) .

OS — Open Space

• Purpose: parks, watershed, wildlife preserves. Open space uses that became nonconforming must follow Chapter 17.70 conditions when redevelopment is proposed (§ 17.06.010, Chapter 17.70) .

Overlay Districts — S‑OL (Senior Overlay), SP (Specific Plan)

• Overlays add rules on top of base districts; nonconforming rules of Chapter 17.70 still apply and the overlay may modify or control the procedures for redevelopment (§ 17.14.020–030) .

At-a-glance: most decision-relevant standards and permit triggers

Practical guidance / synthesis

• The core policy is to prevent expansion and to phase out nonconformities: you may maintain a legally established nonconforming use or structure, but you may not increase its intensity, move to a different nonconforming use, or resume it after an extended discontinuance (180 days) (§ 17.70.030.B, 17.70.050.C) .
• Any physical change to a nonconforming structure or site that would alter the nonconforming dimension or area requires discretionary approval — typically a conditional use permit under Chapter 17.48 (§ 17.70.030.C, 17.70.040.B, 17.70.050.B) .
• If damage exceeds one‑half of replacement cost, the structure/site must be reconstructed to meet current code; the building official or director determines replacement cost (appealable to council) (§ 17.70.040.A, 17.70.050.A) .
• The ordinance contains explicit exceptions that ease rebuilding or parking/garage rules for older residential neighborhoods (e.g., continuing a one‑car garage, setback averaging) — use these to evaluate feasible repairs or minor expansions (§ 17.70.100 for several residential exceptions) .
• Sign and parking nonconformities are handled in their own chapters. For instance, nonconforming signs have their own abatement schedule in the signs chapter and off‑street parking standards are in Chapter 17.26; those chapters interact with Chapter 17.70 when a site is developed or a use is intensified .

First mention links: the city’s rules about parking and setbacks/development standards are important to many nonconforming repairs or rebuilds; any discretionary repairs will commonly require design review and may be affected by overlay districts. Accessory Dwelling Units and how they interact with nonconforming conditions are discussed on the city ADU page ADUs; building-permit and reconstruction work must also follow the California Building Standards Code.

Checklist — what an applicant must satisfy (typical)

• Establish whether the condition is a nonconforming use, nonconforming structure, or nonconforming site per the definitions in § 17.70.020 and document legal establishment date and supporting evidence (deeds, prior permits) .
• If proposing repair/alteration, determine whether the change will increase area/intensity or change the dimension of the nonconformity; any increase is generally prohibited (§ 17.70.030.A, 17.70.040.B) .
• If the property is damaged, prepare replacement‑cost documentation to show whether damage is under or over the 50% threshold (§ 17.70.040.A, 17.70.050.A) .
• If development will leave the nonconformity unchanged or reduce it, prepare a Conditional Use Permit application (Chapter 17.48) and supporting site plans demonstrating compliance with other Title 17 provisions, including parking, landscaping, and design review requirements (§ 17.70.030.C, § 17.70.040.B, § 17.70.050.B) .
• If relying on an exception (nonconforming lot, sideyard setback averaging, garage rules), show compliance with the specific criteria in § 17.70.100 and applicable district standards (Table 2‑3) .
• Confirm no illegal nonconforming condition exists — illegal nonconforming uses/structures are not protected and must be removed immediately per § 17.70.070; illegal conditions are enforced under Chapter 17.80 .
• Verify whether the project triggers other approvals (design review, development plan permit, minor variance, or building permits) and include those applications; follow the application procedures in Chapter 17.36 and appeals in 17.76 .

Risks & Ambiguities

Plain-English Summary

If your property in Rancho Mirage is “grandfathered” because something on it (a use, building, or site feature) does not meet today’s zoning rules, you can keep it — but you can’t make it bigger, switch it to a different grandfathered use, or leave it idle for more than 180 days or you lose the protection; major repairs or redevelopment almost always trigger discretionary review and sometimes require bringing the site up to current standards (§ 17.70.010–100) .

Source References

• Rancho Mirage Municipal Code, Chapter 17.70 (Nonconforming Uses, Sites and Structures), including § 17.70.010–100 (purpose, definitions, nonconforming uses, structures, sites, building permits prohibition, exceptions) .
• Rancho Mirage Municipal Code, Division II — Zoning Districts and Tables (Table 2‑1, § 17.06.010) for district names and structure of district regulations .
• Rancho Mirage Municipal Code, Chapter 17.08 (Residential districts general development standards) and Table 2‑3 for residential setbacks, parcel sizes and density (examples cited above) .
• Rancho Mirage Municipal Code, Chapter 17.12 (Institutional standards; examples) and Chapter 17.26 (Parking and Loading Standards) for interaction with parking regulations .
• Rancho Mirage Municipal Code, Chapter 17.28 (Signs) — abatement and nonconforming sign rules referenced above .
• Rancho Mirage Municipal Code, Division V (Administration), Chapter 17.66 and Chapter 17.80 (Enforcement) for procedural/appeal and enforcement context .
• Rancho Mirage Municipal Code, Chapter 17.30 (Accessory dwelling units and accessory structures) for ADU/ accessory structure cross‑references and minimum unit sizes; see § 17.30.200 for ADU provisions and how they interact with nonconforming site conditions .
• California Building Standards Code (state building code) for construction standards that apply when reconstructing or repairing buildings (referenced for permit/design compliance) .

Retrieved passages

• Rancho Mirage Zoning Code (§ 1) High relevance show source text
• Rancho Mirage Zoning Code (§ 1) High relevance show source text
• Rancho Mirage Zoning Code (§ 1) High relevance show source text
• Rancho Mirage Zoning Code (§ 1) High relevance show source text
• Rancho Mirage Zoning Code (§ 1) High relevance show source text
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• Rancho Mirage Zoning Code (title applies) High relevance show source text
• Rancho Mirage Zoning Code (title and) High relevance show source text
• Rancho Mirage Zoning Code Medium relevance show source text
• Rancho Mirage Zoning Code (§ 2) Medium relevance show source text
• Rancho Mirage Zoning Code Medium relevance show source text
• Rancho Mirage Zoning Code (§ 17.08.020.) Medium relevance show source text
• Rancho Mirage Zoning Code (§ 1) Medium relevance show source text
• Rancho Mirage Zoning Code (§ 1) Medium relevance show source text
• CBC § 1 (§ 1) Medium relevance show source text
• Rancho Mirage Zoning Code (§ 1) Medium relevance show source text

Cited sections

• Rancho Mirage Municipal Code, Chapter **17.70** (Nonconforming Uses, Sites and Structures), including § **17.70.010–100** (purpose, definitions, nonconforming uses, structures, sites, building permits prohibition, exceptions) .
• Rancho Mirage Municipal Code, Division II — Zoning Districts and Tables (Table 2‑1, § **17.06.010**) for district names and structure of district regulations .
• Rancho Mirage Municipal Code, Chapter **17.08** (Residential districts general development standards) and Table 2‑3 for residential setbacks, parcel sizes and density (examples cited above) .
• Rancho Mirage Municipal Code, Chapter **17.12** (Institutional standards; examples) and Chapter **17.26** (Parking and Loading Standards) for interaction with parking regulations .
• Rancho Mirage Municipal Code, Chapter **17.28** (Signs) — abatement and nonconforming sign rules referenced above .
• Rancho Mirage Municipal Code, Division V (Administration), Chapter **17.66** and Chapter **17.80** (Enforcement) for procedural/appeal and enforcement context .
• Rancho Mirage Municipal Code, Chapter **17.30** (Accessory dwelling units and accessory structures) for ADU/ accessory structure cross‑references and minimum unit sizes; see § **17.30.200** for ADU provisions and how they interact with nonconforming site conditions .
• California Building Standards Code (state building code) for construction standards that apply when reconstructing or repairing buildings (referenced for permit/design compliance) .
• RanchoMirage_ZoningCode.md
• 2025 California Building Code.md

• Official Rancho Mirage code library