Modesto — Design Review

Last reviewed: July 2, 2026

Overview

Design review in Modesto is implemented through the City’s development plan review process (often applied administratively by the Director or, for larger/discretionary projects, by the Planning Commission). The ordinance requires projects to conform to adopted Design Guidelines and gives the Director authority to impose conditions to achieve neighborhood compatibility. Key rules and procedures live in the City’s Development Plan Review and zone-specific articles (see § 10-9.1001, § 10-9.1004, § 10-9.1005) .

Note: this page focuses only on Modesto’s zoning/planning ordinance requirements for design / development plan review. It does not cover the California Building Standards (Title 24) or separate building-permit technical requirements; see the California Building Standards Code for those topics. Link references in the text: the word design review below links to Modesto’s zoning menu. The page also links to Modesto pages for parking, development standards, overlay districts, ADUs, historic preservation, landscaping and screening, and the California Building Standards Code where those topics are mentioned.

What the ordinance says — core rules

• Development plan review is the vehicle the City uses to apply design controls: the ordinance establishes the purpose and scope of development plan review in § 10-9.1001 and sets applicability in § 10-9.1002 .
• The scope of review explicitly includes conformance with applicable development standards and "adopted design review guidelines" (the City applies those guidelines when evaluating design) under § 10-9.1004 and § 10-4.113 .
• Procedure and who decides: the Director performs administrative development plan review and may refer projects to the Planning Commission; written decisions with appeal paths are described in § 10-9.1005 (including notification requirements for residential projects) .
• The City authorizes use of design guidelines in any review (building permit, administrative approval, development plan review, conditional use) per § 10-4.113 .
• For accessory dwelling units (ADUs), the Modesto ordinance establishes ministerial review rules: ADU applications are processed ministerially and must be approved or denied within 60 days when complete (§ 10-4.503); ADU/submittal and ministerial provisions coexist with applicability of development standards (§ 10-4.502—10-4.503) .
• Neighborhood-compatibility design rules apply to many residential second-story projects: new two-story dwellings, accessory buildings, and second-story additions trigger second-story development plan review in certain zones per § 10-4.110 (R-1 and R-2/R-3 adjacent to R-1 rules) .

(First internal links used in natural mentions above: design review, parking, development standards, overlay districts, ADUs, historic preservation, landscaping and screening, California Building Standards Code.)

District-by-district breakdown

Below are the principal zoning district labels used by the Modesto Municipal Code that affect how design review is applied. For each district I list what the ordinance text (as retrieved) ties into design / review. When the code text needed for a complete "permitted uses" or exact numeric standard is not present in the retrieved materials, I state that explicitly and tell you what to verify with the City.

Note on citations: each district heading below is the exact district name used in the Modesto code and bolded.

R-1 (Single-Family Residential)

• Purpose / design role: The ordinance treats R-1 as the single-family residential zone referenced in multiple design-compatibility rules; projects with two-story components in R-1 are subject to second‑story development plan review to ensure neighborhood compatibility under § 10-4.110 .
• Typical permitted uses: The code references R-1 in the context of single-family dwellings; an explicit full permitted-use list is Not found in retrieved materials. Verify with the full zoning tables in the official zoning chapter.
• Key dimensional/design standards that affect review: second‑story thresholds (two-story or 16 ft top plate line trigger) and privacy/visibility concerns are treated under § 10-4.110; accessory building limits and setbacks for residential accessory buildings are set out in § 10-4.114 (Accessory Buildings table) .
• Where it applies: citywide where the map designates R-1; the Director applies Neighborhood Compatibility Guidelines for applicable development plan review actions per § 10-4.110 and § 10-4.113 .

R-2 (Two‑Family / Low-Density Multi‑Family)

• Purpose / design role: R-2 projects with second stories or multi‑family adjacent to R-1 are subject to development plan review to evaluate neighborhood compatibility per § 10-4.110 .
• Typical permitted uses: Not found in retrieved materials (verify permitted-use table in zoning article).
• Key standards that affect design review: second‑story review requirements (see § 10-4.110) and the general requirement that projects conform to the City's Design Guidelines (§ 10-4.113) .

R-3 (Multi‑Family Residential)

• Purpose / design role: Multi‑family housing in R-3 is subject to development plan review when adjacent to R-1 and/or when exceeding certain height/story thresholds (see § 10-4.110) .
• Typical permitted uses and numeric standards: Not found in retrieved materials; verify zone table and development standards.

P-O (Professional Office)

• Purpose / design role: Commercial/office zones like P-O are listed in various development standards and sign/fence rules; fence front-yard exceptions for parcels zoned P-O are referenced in fence standards § 10-4.406 .
• Typical permitted uses and dimensional standards: Not found in retrieved materials—verify in the Modesto zoning tables.

C-1, C-2, C-3, C-M (Commercial / Mixed)

• Purpose / design role: The Modesto code references these commercial districts in sign/fence design and telecom/height tables (e.g., telecom facility allowed heights are tabled across C-2/C-3/C-M in the telecom section) and are therefore subject to design-related conditions applied through development plan review § 10-9.1001 and sign/fence standards § 10-4.406 .
• Typical permitted uses and key dimensional standards: Not found in retrieved materials; verify the zoning use tables and the Downtown or Commercial articles.

M-1, M-2 (Industrial)

• Purpose / design role: Industrial zones appear in specialized standards (e.g., telecom heights, screening for outdoor storage) which get reviewed through the Director’s development plan review authority § 10-9.1004 and facility-specific chapters .
• Typical permitted uses and numeric standards: Not found in retrieved materials.

P-D (Planned Development)

• Purpose / design role: P-D is referenced as a zone type where exceptions and special conditions may be applied, and wall/fence rules and development plan review authority are applicable; see fence limits § 10-4.406 and the general Development Plan Review article § 10-9.1001 .
• Typical permitted uses and standards: Not found in retrieved materials; planned developments typically carry project-specific standards—verify the P‑D ordinance text.

Downtown Zones (Central Downtown, Transition Downtown, Urban General Downtown, Main Street Downtown, East Neighborhood Downtown, Traditional Neighborhood Downtown)

• Purpose / design role: The code contains Downtown-specific provisions and a Downtown Historic Zoning Designation (definitions in § 10-7.516) and special development plan review and exception rules for downtown that explicitly call out historic/downtown design contexts, including exceptions for existing development in the Downtown zones (§ 10-7.503, § 10-7.516) .
• Typical permitted uses: The Downtown article handles allowed uses and conversion rules for uses in these zones (see § 10-7.503) — exact permitted-use lists are Not found in retrieved materials; verify the Downtown zoning article.
• Key design implications: projects within Downtown may use Downtown-specific development standards, may be eligible for exceptions for remodeling/expansions, and are subject to the Downtown Historic Zoning Designation rules § 10-7.503, § 10-7.516 .

Decision‑relevant standards table

Checklist

• Submit complete site plan, elevations, materials/color samples, landscape plan, lighting plan, and parking layout (site plan/elevations/specs per Director format) — per § 10-1.505(c) and § 10-9.1005(a) . (For parking details consult the City parking standards)
• Demonstrate conformance to applicable development standards (setbacks, lot coverage, height) cited in the zoning district article — per § 10-9.1004(a) . (See Modesto Development Standards.)
• If project is a second‑story or new two‑story in R-1, include neighborhood-compatibility information and privacy/visibility mitigation measures to satisfy § 10-4.110 .
• If in Downtown or a historic overlay, include documentation on applicable Downtown standards and whether existing‑development exceptions apply — see § 10-7.503 and § 10-7.516 .
• For ADUs, ensure package meets ministerial checklists described in § 10-4.503 (timelines/ministerial review) .
• Be ready for Director conditions or a referral to Planning Commission; confirm noticing requirements and appeal timelines per § 10-9.1005(e–f) .
• Landscaping and screening details when required (screen outdoor storage, fences, and visibility triangle compliance) per § 10-4.405, § 10-4.406, and vision-obstruction rules § 10-4.404 .

Risks & Ambiguities

Plain‑English Summary

If your project changes the look, scale, or siting of buildings in Modesto it will usually be looked at through the City’s development plan review process so staff can confirm it meets the zoning rules and the City’s Design Guidelines; small ADUs are processed ministerially but larger or second‑story and downtown projects commonly require administrative design review and sometimes Planning Commission review (verify early with Planning). Key ordinance references: § 10-9.1001, § 10-9.1004, § 10-9.1005, § 10-4.110, § 10-4.503 .

Source References

• Modesto Municipal Code — Development Plan Review purpose & applicability: § 10-9.1001, § 10-9.1002
• Modesto Municipal Code — Scope of review and administrative procedure: § 10-9.1004, § 10-9.1005
• Modesto Municipal Code — Design application rule: § 10-4.113
• Modesto Municipal Code — Second‑story / neighborhood compatibility rules (R-1, R-2, R-3): § 10-4.110
• Modesto Municipal Code — Accessory Buildings / ADU provisions: § 10-4.114, § 10-4.502, § 10-4.503
• Modesto Municipal Code — Fences, screening, vision triangle, and related design items: § 10-4.404, § 10-4.405, § 10-4.406
• Modesto Municipal Code — Downtown articles and definitions (Downtown Historic Zoning Designation): § 10-7.503, § 10-7.516

Information gaps / items Not found in retrieved materials

• Complete numeric zone tables of permitted uses, exact setbacks, lot coverage, floor‑area ratio (FAR), and full development‑standard tables for each district — Not found in retrieved materials. Verify in the full zoning article and the official zoning map.
• The city’s adopted Design Guidelines document text and any checklists the Director uses in practice (the ordinance references adopted Design Guidelines but the guideline content is not in the retrieved excerpts) — Not found in retrieved materials. Request the adopted Design Guidelines from Planning.
• Specific lists of which project types (beyond the broad categories) are subject to administrative vs. Commission review — the ordinance describes discretion and criteria but the complete applicability lists must be verified in the full § 10-9.1002(b) and related articles.

Retrieved passages

• Modesto Zoning Code (section above) High relevance show source text
• Modesto Zoning Code (Chapter 9) High relevance show source text
• Modesto Zoning Code (Chapter 9) High relevance show source text
• Modesto Zoning Code (Section 10-3.407) High relevance show source text
• Modesto Zoning Code (chapter would) High relevance show source text
• CBC § 66314 (§ 66314) High relevance show source text
• CGBSC § A5.103 (SECTION A5.103) High relevance show source text
• Modesto Zoning Code (§ 66317) High relevance show source text

Cited sections

• Modesto Municipal Code — Development Plan Review purpose & applicability: **§ 10-9.1001**, **§ 10-9.1002** (§ 10-9.1001)
• Modesto Municipal Code — Scope of review and administrative procedure: **§ 10-9.1004**, **§ 10-9.1005** (§ 10-9.1004)
• Modesto Municipal Code — Design application rule: **§ 10-4.113** (§ 10-4.113)
• Modesto Municipal Code — Second‑story / neighborhood compatibility rules (R-1, R-2, R-3): **§ 10-4.110** (§ 10-4.110)
• Modesto Municipal Code — Accessory Buildings / ADU provisions: **§ 10-4.114**, **§ 10-4.502**, **§ 10-4.503** (§ 10-4.114)
• Modesto Municipal Code — Fences, screening, vision triangle, and related design items: **§ 10-4.404**, **§ 10-4.405**, **§ 10-4.406** (§ 10-4.404)
• Modesto Municipal Code — Downtown articles and definitions (Downtown Historic Zoning Designation): **§ 10-7.503**, **§ 10-7.516** (§ 10-7.503)
• Modesto_ZoningCode.md

• Official Modesto code library