Sierra Madre — Development Standards

Last reviewed: July 2, 2026

Overview

This page summarizes the City of Sierra Madre's local zoning development standards (setbacks, height, lot coverage, density, FAR) as written in Title 17 of the municipal code. It highlights the rules that most often drive project feasibility (front/side/rear setbacks, height caps, lot coverage / FAR and density limits), and points applicants to the standards that trigger design review or overlay rules. For site plan work you will also need a parking plan and to follow the city's parking rules and the City’s ADU policy where applicable; verify building-level requirements with the California Building Standards Code.

How this page is grounded

All numeric standards below are taken from the Sierra Madre Municipal Code (Title 17). Each item shows the controlling code citation (with the § reference) and the file excerpt used for that claim. If a numeric or procedural detail could not be confirmed in the retrieved materials I note that explicitly.

District-by-district development standards

Note: each district heading below uses the ordinance terminology. Where the ordinance gives a chapter or section number, that § is shown after the rule and the file-search citation is provided.

R-1 — One-Family Residential (Chapter 17.20)

• Purpose & typical uses: Single-family homes, accessory buildings, home occupations; second units and ADUs governed by Chapter 17.22. Permitted uses are listed in § 17.20.020 .
• Dimensional standards and key controls:
  • Permitted uses and accessory uses: § 17.20.020 .
  • R-1 height standards are applied across several zones (see cross-references such as § 17.30.060 for R‑C referencing § 17.20.040) — consult § 17.20.040 for the R-1 height method/limit (code reference present in the code) .
  • ADU-specific rules and exemptions reference R-1 in Chapter 17.22 (side/rear setbacks for new ADUs, parking exemptions, and height limits) — see § 17.22. excerpts for ADU standards (side/rear 4 ft minimum for new ADUs; attached ADU height limited to the lesser of 25 ft or the applicable zone limit) § 17.22. .
• Where this district applies: Citywide single-family neighborhoods as mapped in the zoning map (see Chapter 17.20).

R-C — Residential Canyon (Chapter 17.30)

• Purpose & typical uses: Preserve the canyon’s small-house character; limited to one-family dwellings, home occupations, public utilities, second units, transitional/supportive housing and similar uses per § 17.30.030 .
• Key dimensional standards:
  • Combined minimum front + rear yard = 35 ft; front at least 15 ft, rear at least 10 ft (administrative design review can reduce rear to no less than 5 ft) — § 17.30.070 .
  • Maximum lot coverage: 50% of lot area for solid roofed structures in R‑C — § 17.30.120 .
  • Height: R‑1 height standards apply in R‑C; additional angle‑plane rules (45° plane from 10 ft at side lot lines) also apply — § 17.30.060 .
  • Accessory structures (≤ 600 sq ft, single‑story, ≤ 15 ft high) may be allowed 5 ft from side/rear with an administrative design review — § 17.30.080 .
• Where this district applies: R‑C map areas (the "canyon" neighborhoods) — see Chapter 17.30 .

R-3 family / multi-family — R-3-13, R-3-20, R-3-30 (Chapters 17.28–17.29)

• Purpose & typical uses: Multi‑family residential to meet regional housing needs. The R-3 series controls unit counts, densities and multi-family design standards (per § 17.28.050 and § 17.29.020). Permitted uses in the R-3-20 and R-3-30 zones mirror the R‑3‑13 permitted uses except as modified in § 17.29.030 .
• Key dimensional standards (see § 17.29.030):
  • Minimum lot size for new development in R-3‑20/30: 11,000 sq ft — § 17.29.030(A) .
  • Allowable density:
    • R-3-20: 20–24 du/acre (minimum and maximum) — § 17.29.030(B)(a) .
    • R-3-30: 30–34 du/acre — § 17.29.030(B)(b) .
  • Setbacks: In R-3‑30, minimum front yard for first and second floors is 15 ft; other setback rules follow the R‑3‑13 standards in Chapter 17.28 — § 17.29.030(D) and § 17.28.050 .
  • Height & third‑story allowance: A third story element is allowed only under strict size/location rules: must be > 40 ft from any public street, horizontal dimension ≤ 45 ft, total area of third‑story elements ≤ 20% of gross lot area; max height measured per R‑1 method but capped at 30 ft for projects with a third story — § 17.29.030(E) .
  • Floor Area Ratio (FAR): For developments with more than 11 units, FAR limited to 100% (1.0 FAR = total floor area equal to gross lot area), with limited exceptions for eight–ten unit projects (125% per Government Code reference) — § 17.29.030(G) .
  • Building coverage: For larger R‑3 projects, "maximum building coverage requirements shall not apply" (i.e., coverage rules differ from single‑family chapters) — § 17.29.030(H) .
• Where this district applies: Properties zoned R‑3‑13, R‑3‑20, R‑3‑30 (see the zoning map and Chapters 17.28–17.29) .

C — Commercial / Central Core (Chapter 17.36 and Core area limits in Chapter 17.35)

• Typical uses: Commercial retail and mixed uses downtown — see the C‑zone development standards in Chapter 17.36 and central-core limits in the voter-empowerment overlay § 17.35 .
• Key standards:
  • Roofed coverage limit: coverage of roofed structures shall not exceed 80% (exclusive of required public ways) — § 17.36.080 .
  • Height in C zone: generally 30 ft and 2 stories maximum — § 17.36.090 .
  • Yard/setback norms and landscaping requirements appear in Chapter 17.36 (front yard 5 ft minimum in some C‑subsections; see § 17.36.070 for yards and § 17.36.080 for coverage) — § 17.36.070–080 .
• Special downtown (central core) caps:
  • The voter-empowerment limits restrict new construction in the central core to no more than 30 ft and 2 stories and cap density at 13 du/acre for that area (subject to state density bonus law) — § 17.35.030 and § 17.35.040 .

R-H — Hillside Management (R‑H; hillside overlay rules)

• Purpose: Manage development on steep slopes and protect ridgelines; lots may have slope‑category constraints, required off‑street parking standards, and special setback/visibility protections.
• Key standards (examples from Chapter 17.?? on R‑H):
  • Slope Category 4 is generally no-build unless no feasible alternative; development must meet pad location, parking, and other criteria — see the R‑H chapter rules and limitations such as setback from ridgelines and parking requirements (off‑street parking plus one space per 1,000 sq ft in excess of 4,000) — relevant provisions summarized in the R‑H chapter (see hillside rules and exceptions) (R‑H chapter) .
• Where it applies: hillside parcels mapped as R‑H — see Chapter references in Title 17 (search R‑H chapter for parcel‑specific constraints) .

Institutional ("I") and specific plan overlays (e.g., Kensington, British Home)

• Institutional zones and specific plan overlay areas carry their own coverage and height rules. For example, the Institutional zone lists adjacency-based height caps (e.g., 25 ft when within 0–49 ft of R‑1 or commercial zones, and 33 ft beyond 50 ft) and lot coverage percentages by adjacency (35% adjacent to R‑1; 60% adjacent to commercial) — see the Institutional development standards in the applicable chapter (code excerpt) (institutional development standards table) .
• Specific plans (Kensington, British Home) reference an adopted specific plan that governs allowable uses and development regulations for the overlay area — see Chapter 17.41 (Kensington) and Chapter 17.42 (British Home) for details and the requirement that the specific plan governs development within the overlay zone § 17.41–17.42 .

Quick reference table — most decision‑relevant numeric standards

(Each numeric entry above is sourced to the cited municipal code § and the retrieved file excerpt.)

Checklist — what an applicant must satisfy (preliminary)

• Verify the property's zoning district and overlay status (R‑1, R‑C, R‑3‑13/20/30, R‑H, C, etc.) — see the zoning map and Title 17 (verify citations: § 17.20, § 17.30, § 17.28–17.29) .
• Confirm maximum allowable density (especially in R‑3 zones) — § 17.29.030(B) for R‑3‑20/30 densities .
• Prepare a dimensioned site plan showing front/side/rear setbacks and building height calculation per local method — see § 17.30.070 and R‑1 height method § 17.20.040 .
• Prepare a lot coverage/FAR calculation and confirm compliance with district limits (R‑C 50%, C 80%, R‑3 FAR rules) — § 17.30.120, § 17.36.080, § 17.29.030(G) .
• Include a parking plan that meets the city's parking standards and note ADU parking exemptions in Chapter 17.22 where applicable (§ 17.22. for ADU parking) .
• Check whether the project triggers design review or administrative design review (many second‑story additions, specific thresholds in § 17.28.070, § 17.30.045, § 17.60.041) .
• If the site is in a historic area, follow the city's Historic preservation rules and submit required historic assessments — see the historic preservation chapter excerpts (§ 17.58.060 and related sections) .
• For hillside/R‑H parcels, confirm slope categories and ridgeline setbacks under the R‑H chapter — see R‑H provisions (slope categories, pad location, ridgeline rules) .

Risks & Ambiguities

Plain-English Summary

Sierra Madre’s zoning (Title 17) sets strict, district‑specific limits: small front yards and tight side/rear rules in canyon and single‑family areas, 30‑ft/2‑story caps in many commercial and core areas, defined lot coverage caps in R‑C and C zones, and explicit density/FAR and third‑story rules in the R‑3 multi‑family zones — always check the specific chapter (§ numbers above) that applies to your parcel before planning design work. Key triggers for extra review are anything that adds a story, changes the lot coverage/FAR, or falls in hillside or historic overlays (see design review and overlay chapters) .

Information Gaps

• Full numeric R‑1 height table by subsection (exact numeric value for R‑1 maximum height is referenced but the standalone numeric subsection for § 17.20.040 was referenced rather than quoted; confirm the numeric cap in the full Title 17 text) — referenced in code but the complete text for § 17.20.040 is not fully printed in the retrieved excerpts here .
• Complete text of Chapter 17.28 (R‑3‑13 development standards) includes several tiered rules; excerpts are present but applicants should read Chapter 17.28 in full for all exceptions and sub‑standards — partial excerpts were available (see § 17.28.050) .
• Parcel‑specific overlays (historic districts, Kensington/British Home specific plan details) reference external specific plans (copies on file with the planning department) — full overlay development regulations and maps are not reproduced here; obtain the specific plan documents to confirm detailed rules (specific plan chapters) .

Source References

• R‑C: Setbacks, coverage, accessory structure rules — § 17.30.070, § 17.30.080, § 17.30.120 .
• R-1 permitted uses and chapter references — § 17.20.020 and R‑1 cross references (height method referenced at § 17.20.040) .
• R-3: Development regulations, density, FAR and third-story rules — § 17.29.010–030 and references to § 17.28.050 for permitted uses .
• Commercial / central core: coverage and height caps — § 17.36.080, § 17.36.090; core-area voter empowerment caps — § 17.35.030–040 .
• ADU standards and exemptions (setbacks, height, parking exemptions) — Chapter 17.22 excerpts (ADU setbacks 4 ft side/rear for new ADUs; attached ADU height limit the lesser of 25 ft or zone cap; parking exemptions list) (Chapter 17.22) .
• Design review procedures and findings — § 17.60.041 (administrative design review purpose, findings) and § 17.28.070 (when design review required) .
• Institutional zone adjacency height/coverage table and overlay-specific plan references — institutional development standards excerpt (institutional adjacency height & coverage) .
• Hillside (R‑H) limitations and slope category protections — R‑H chapter excerpts (slope categories, ridgeline setbacks, parking) — R‑H chapter excerpts (R‑H) .
• Text excerpts compiled from the Sierra Madre Title 17 municipal code file provided in the project materials (multiple chapter excerpts as cited above) .

Retrieved passages

• CFC § 2 (Chapter 15.24) High relevance show source text
• Sierra Madre Zoning Code (chapter shall) High relevance show source text
• CFC § 4 (Chapter 15.24) High relevance show source text
• Sierra Madre Zoning Code (Section 17.08.020) High relevance show source text
• CBC § 66314 (§ 66314) High relevance show source text
• Sierra Madre Zoning Code (section may) High relevance show source text
• Sierra Madre Zoning Code (Section 17.48.130.) High relevance show source text
• Sierra Madre Zoning Code (Section 17.28.050) High relevance show source text
• Sierra Madre Zoning Code (title of) High relevance show source text
• Sierra Madre Zoning Code (Section 17.28.030) High relevance show source text
• Sierra Madre Zoning Code (§ 1) High relevance show source text
• Sierra Madre Zoning Code (Section 17.08.020) High relevance show source text
• Sierra Madre Zoning Code (§ 2) High relevance show source text

Cited sections

• R‑C: Setbacks, coverage, accessory structure rules — **§ 17.30.070**, **§ 17.30.080**, **§ 17.30.120** . (§ 17.30.070)
• R-1 permitted uses and chapter references — **§ 17.20.020** and R‑1 cross references (height method referenced at **§ 17.20.040**) . (chapter references)
• R-3: Development regulations, density, FAR and third-story rules — **§ 17.29.010–030** and references to **§ 17.28.050** for permitted uses . (§ 17.29.010)
• Commercial / central core: coverage and height caps — **§ 17.36.080**, **§ 17.36.090**; core-area voter empowerment caps — **§ 17.35.030–040** . (§ 17.36.080)
• ADU standards and exemptions (setbacks, height, parking exemptions) — Chapter **17.22** excerpts (ADU setbacks **4 ft** side/rear for new ADUs; attached ADU height limit the lesser of **25 ft** or zone cap; parking exemptions list) **(Chapter 17.22)** . (Chapter 17.22)
• Design review procedures and findings — **§ 17.60.041** (administrative design review purpose, findings) and **§ 17.28.070** (when design review required) . (§ 17.60.041)
• Institutional zone adjacency height/coverage table and overlay-specific plan references — institutional development standards excerpt **(institutional adjacency height & coverage)** .
• Hillside (R‑H) limitations and slope category protections — R‑H chapter excerpts (slope categories, ridgeline setbacks, parking) — R‑H chapter excerpts **(R‑H)** . (chapter excerpts)
• Text excerpts compiled from the Sierra Madre Title 17 municipal code file provided in the project materials (multiple chapter excerpts as cited above) . (Title 17)
• SierraMadre_ZoningCode.md

• Official Sierra Madre code library