Sierra Madre — Zoning

Last reviewed: July 2, 2026

Overview

Sierra Madre's zoning rules are codified in Title 17 - ZONING of the municipal code. Title 17 establishes the city's official zones (e.g., R-1, R-2, R-3-13, R-3-20, R-3-30, R-C, R-H, M) and overlay/specific-plan areas (for example, the Kensington Specific Plan Overlay and the British Home Specific Plan Overlay) and ties those zones to the official zoning map. The code sets permitted and conditionally‑permitted uses, development standards (setbacks, lot area, lot coverage, FAR, height), design-review triggers, and hillside/hazard rules. See the master zoning provisions in § 17.04.010–§ 17.04.100 for scope and map defaults.

Note on internal resources: references below will point you to the city's pages on parking, setbacks/development standards, design review, overlays, ADUs, and the California Building Standards Code at the first natural mention of each topic.

How the code treats the Zoning Map and map defaults

• The municipal code uses an official zoning map to assign zones to parcels; if a property is not shown on the map, it defaults to R-1 classification under § 17.04.100.
• The voter-adopted "central core area" (downtown) has its own map attachment and must be included on copies of the zoning and general‑plan maps; the initiative also imposes special downtown limits (height and density) that take priority for the central core (see § 17.35.070, § 17.35.030, § 17.35.040).

District-by-district breakdown

Each subsection below gives: purpose, typical permitted uses, key dimensional / development standards, and code references.

R-1 — One‑Family Residential Zone

• Purpose: Preserve single‑family neighborhoods and establish standards for single‑family lots. Code references: § 17.20.010–§ 17.20.130 and related subsections.
• Typical permitted uses: one‑family dwellings, home occupations, accessory structures, guest houses (subject to rules), pets, and public parks. See § 17.20.020 for permitted uses.
• Key standards (examples): minimum lot area for standard R-1 is 7,500 sq ft unless otherwise designated; various map suffixes (e.g., R-1-9, R-1-11, R-1-15) increase minimum lot area to 9,000, 11,000, 15,000 sq ft respectively via § 17.20.080; development rules for newly created lots and widths appear at § 17.20.100.
• Design review / triggers: some larger projects and many additions require design review per Chapter 17.60 (see § 17.60.041).

(First time we mention setbacks / development standards we link: the city's guidance on setbacks and development standards is available at Sierra Madre Development Standards.)

R-2 — Two‑Family Residential Zone

• Purpose & permitted uses: Allows uses permitted in R-1 plus two‑family dwellings / duplexes and similar light multiple‑residential uses. See § 17.24.020.
• Dimensional standards: Maximum two stories or 30 ft height (whichever is less); front yard 25 ft; side/rear yard minima and lot area standards are laid out in § 17.24.030–§ 17.24.080 (see especially § 17.24.040–§ 17.24.070).

R-3-13 — Medium/High‑Density Residential Zone

• Purpose: Intended for medium/high‑density residential development near downtown and major collectors; density and form standards to remain compatible with Sierra Madre's character. Code reference: § 17.28.010 et seq.
• Permitted uses: Multi‑family dwelling units (attached/detached) with tiered maximum units per lot based on lot area (Tier rules) and accessory uses; ADUs are referenced to Chapter 17.22. See § 17.28.050.
• Development rules: minimum lot dimensions for new R-3-13 lots, lot consolidation encouragement, and design review triggers (design review required for many new or larger projects) are in § 17.28.030, § 17.28.070, and related sections.
• Design review triggers and conditional uses: conditional uses and design‑review thresholds are listed in § 17.28.060–§ 17.28.070.

R-3-20 / R-3-30 — Higher Density Multi‑Family Zones

• Purpose: Provide for the city’s regional housing needs at higher densities; these zones adopt the R‑3‑13 permitted uses with modified density and development standards. Code references: § 17.29.010–§ 17.29.050.
• Key numeric standards: R-3-20: 20–24 du/acre allowable density; R-3-30: 30–34 du/acre allowable density (see § 17.29.030). Minimum lot size for new development is 11,000 sq ft; certain yard and frontage rules differ for R-3‑30.

R-C — Residential Canyon Zone

• Purpose: Preserve canyon-area residential character with smaller lots and tighter massing rules; designation on the map = R‑C. § 17.30.010–§ 17.30.130 set the standards.
• Permitted uses: Single‑family dwellings, home occupations, second units (Chapter 17.22), family daycare—see § 17.30.030.
• Standards examples: minimum lot area 15,000 sq ft (but exceptions for existing lots), maximum lot coverage 50%, and specific rules for floor area measurements and setbacks (see § 17.30.100–§ 17.30.130).
• R-C accessory structures and setbacks are detailed across § 17.30.080–§ 17.30.120.

R-H — Hillside Management (R‑H) Zone

• Purpose: Control development on hillside parcels with slope categories, grading controls, and special permits. The official zoning map marks R‑H as R‑H. See § 17.52.030–§ 17.52.200.
• Permits: R‑H requires either an administrative hillside development permit or a hillside development permit for most grading, construction, and subdivision activity (see § 17.52.050).
• Controls: slope‑category restrictions (including prohibition on development in Slope Category 4 except in narrow circumstances), off‑street parking minimums, and ridge‑setback/visual‑profile rules are codified in § 17.52.060–§ 17.52.200.

M — Manufacturing / Industrial Zone

• Purpose and standards: the M zone contains construction‑site and operational standards (e.g., site maintenance, temporary services, refuse), with site rules in § 17.40.090 and related subsections. Use lists and conditional uses that affect commercial/industrial zones are spread across the code (see the conditional‑use lists in the code).

Overlay & Specific‑Plan Zones (examples)

• Kensington Specific Plan Overlay — created and applied to defined lots; see § 17.41.010–§ 17.41.020 for adoption and the overlay map.
• The British Home Specific Plan Overlay — established for specified parcels; the overlay requires compliance with the British Home Specific Plan for certain institutional uses. See § 17.42.010–§ 17.42.020.

(When assessing on‑site vehicle requirements consult the city's rules on parking; when checking ornamentation, fences, or sign compliance consult Signage.)

Decision‑relevant standards table (quick reference)

(For parking layout and counts, see Chapter 17.68 and the city's parking page.)

Practical guidance / synthesis (plain-English interpretation)

• If your lot is shown as R-1 on the zoning map, expect single‑family controls (lot area, setbacks, and a design‑review trigger for larger projects) — confirm the map and the R‑1 suffixes (e.g., R-1-9) because minimum lot area changes by map designation (see § 17.20.080).
• Multi‑family proposals belong in the R‑3 series; R‑3‑13 sets the permitted uses and tiered unit rules while R‑3‑20/30 change allowable density (see § 17.28.050 and § 17.29.030).
• For any hillside property expect additional regulation: most grading, subdivisions and new dwellings in R‑H require a hillside development permit and are subject to slope‑category limits that can prohibit building on steep slope sectors (see § 17.52.050–§ 17.52.200).
• Downtown parcels within the central core have voter‑adopted, binding caps: no more than 30 ft / two stories and no more than 13 net du/acre for new construction, unless state law (e.g., density‑bonus requirements) mandates otherwise in limited respects — these rules come from the voter initiative sections § 17.35.030–§ 17.35.040.

(If you plan changes that touch a third story, big FAR change, or visible frontage, be ready for design review—refer to the city's design review guidance and the code’s design‑review standards.)

Checklist

• Confirm your parcel’s official zone on the City’s zoning map and check for map suffixes (e.g., R-1-9) or overlays. If a parcel is unmapped, it is deemed R‑1 per § 17.04.100.
• Identify whether the property lies in the voter "central core" area (downtown) — if so, apply the initiative caps (§ 17.35.030–§ 17.35.040) and include the Exhibit A map attachment.
• Read the district chapter for your zone (e.g., § 17.20 for R‑1; § 17.24 for R‑2; § 17.28 for R‑3‑13; § 17.29 for R‑3‑20/30; § 17.30 for R‑C; § 17.52 for R‑H) to compile required setbacks, lot area, coverage, and FAR.
• Determine design‑review and conditional‑use triggers (Chapter 17.60) and whether an administrative vs. planning‑commission review is required (see § 17.60.041 and § 17.28.070).
• Check overlay or specific‑plan status (e.g., Kensington § 17.41, British Home § 17.42) to see whether overlay rules override or augment base‑zone rules.
• Review parking requirements in Chapter 17.68 and on the city's parking page; hillside sites often have additional parking rules.
• If doing an ADU, consult Chapter 17.22 and the city's ADU guidance Sierra Madre ADUs.

Risks & Ambiguities

Plain‑English Summary

Sierra Madre’s Title 17 assigns each parcel to a specific zone (R‑1, R‑2, R‑3 variants, R‑C, R‑H, M, etc.) and applies zone chapters that list permitted uses, required setbacks/lot sizes, lot coverage/FAR, and design‑review triggers; downtown parcels have voter‑adopted caps (30 ft / two stories and 13 du/acre) that are especially important to check up front. Verify your parcel’s zone, any overlays, and whether design review or hillside rules apply before you design or budget a project.

Source References

• Sierra Madre Municipal Code, Title 17 — ZONING (print export / codified text). Key cited sections below are within Title 17.
• R‑1 One‑Family Residential: § 17.20.020, § 17.20.080, § 17.20.100.
• R‑2 Two‑Family Residential: § 17.24.020–§ 17.24.070 (standards and yard rules).
• R‑3‑13 Medium/High Density: § 17.28.010–§ 17.28.075 (purpose, permitted uses, design‑review triggers).
• R‑3‑20 and R‑3‑30: § 17.29.010–§ 17.29.050 (density and development regulations).
• R‑C Residential Canyon: § 17.30.010–§ 17.30.130 (purpose, lot area, coverage, floor area).
• R‑H Hillside Management: § 17.52.030–§ 17.52.200 (permits, slope categories, exemptions).
• Central Core / Voter Initiative (downtown) limits and mapping: § 17.35.030–§ 17.35.070.
• Design review rules and authority: § 17.60.041; design review thresholds in R‑3 chapters (§ 17.28.070) and ministerial review rules (§ 17.59.020).
• Parking (off‑street) general requirements: Chapter 17.68 (see § 17.68.060).
• Kensington Specific Plan Overlay: § 17.41.010; British Home Specific Plan Overlay: § 17.42.010–§ 17.42.020.
• Nonconforming uses: Chapter 17.56 and § 17.56.080 (alterations and enlargements).

Retrieved passages

• Sierra Madre Zoning Code (Section 17.08.020) High relevance show source text
• Sierra Madre Zoning Code (§ 1) High relevance show source text
• Sierra Madre Zoning Code (§ 13) High relevance show source text
• Sierra Madre Zoning Code (chapter is) Medium relevance show source text
• Sierra Madre Zoning Code (Section 7060) Medium relevance show source text
• Sierra Madre Zoning Code (§ 1) Medium relevance show source text
• Sierra Madre Zoning Code (chapter as) Medium relevance show source text
• Sierra Madre Zoning Code (§ 1) Medium relevance show source text
• Sierra Madre Zoning Code (title of) High relevance show source text
• CFC § 1 (section shall) High relevance show source text
• Sierra Madre Zoning Code (Chapter 17.22.) High relevance show source text
• Sierra Madre Zoning Code (§ 2) High relevance show source text
• Sierra Madre Zoning Code (section may) High relevance show source text
• Sierra Madre Zoning Code (§ 15) Medium relevance show source text
• Sierra Madre Zoning Code (§ 2) Medium relevance show source text
• Sierra Madre Zoning Code (Section 17.20.040) Medium relevance show source text
• Sierra Madre Zoning Code (Title 17) High relevance show source text
• Sierra Madre Zoning Code (§ 2) High relevance show source text
• Sierra Madre Zoning Code (Section 17.28.030) Medium relevance show source text
• CBC § 15 (§ 15) Medium relevance show source text

Cited sections

• Sierra Madre Municipal Code, Title 17 — ZONING (print export / codified text). Key cited sections below are within Title 17. (Title 17)
• R‑1 One‑Family Residential: **§ 17.20.020**, **§ 17.20.080**, **§ 17.20.100**. (§ 17.20.020)
• R‑2 Two‑Family Residential: **§ 17.24.020–§ 17.24.070** (standards and yard rules). (§ 17.24.020)
• R‑3‑13 Medium/High Density: **§ 17.28.010–§ 17.28.075** (purpose, permitted uses, design‑review triggers). (§ 17.28.010)
• R‑3‑20 and R‑3‑30: **§ 17.29.010–§ 17.29.050** (density and development regulations). (§ 17.29.010)
• R‑C Residential Canyon: **§ 17.30.010–§ 17.30.130** (purpose, lot area, coverage, floor area). (§ 17.30.010)
• R‑H Hillside Management: **§ 17.52.030–§ 17.52.200** (permits, slope categories, exemptions). (§ 17.52.030)
• Central Core / Voter Initiative (downtown) limits and mapping: **§ 17.35.030–§ 17.35.070**. (§ 17.35.030)
• Design review rules and authority: **§ 17.60.041**; design review thresholds in R‑3 chapters (**§ 17.28.070**) and ministerial review rules (**§ 17.59.020**). (§ 17.60.041)
• Parking (off‑street) general requirements: Chapter **17.68** (see **§ 17.68.060**). (§ 17.68.060)
• Kensington Specific Plan Overlay: **§ 17.41.010**; British Home Specific Plan Overlay: **§ 17.42.010–§ 17.42.020**. (§ 17.41.010)
• Nonconforming uses: Chapter **17.56** and **§ 17.56.080** (alterations and enlargements). (§ 17.56.080)
• SierraMadre_ZoningCode.md

• Official Sierra Madre code library