Local zoning · St. Helena

St. Helena — Design Review

Design Review under the St. Helena local zoning and planning code, with the controlling citations.

Ask a question free See coverage

Last reviewed: July 6, 2026

Overview

St. Helena’s Title 17 Zoning Code uses Design Review to check how projects fit local character, scale, and district-specific design standards. Two paths exist: Major Design Review (Planning Commission hearing) and Minor Design Review (administrative by the Community Development Director). Design Review is the discretionary step that sits alongside zoning, development standards, overlay districts, parking, and similar rules; it is distinct from the California Building Standards Code.

Most projects that visibly change site or building form, scale, or street presence will trigger either Major or Minor Design Review; single-family second-story additions, new single-family homes, and most commercial storefront or massing changes are typical Major Design Review triggers under § 17.05.070.

How the process works

  • Authority and appeals
    • Major Design Review is approved by the Planning Commission, with appeal to the City Council; Minor Design Review is approved by the Community Development Director, with appeal to the Planning Commission. See Table 17.03.030(A) for approval authorities. § 17.03.030(A).
  • What triggers which review
    • Major DR applies to, among others: new commercial/industrial/agricultural buildings or exterior modifications of 500 sq ft or more visible from public streets; new public facilities; projects in the HP overlay (with limited façade-change exceptions); any PD overlay development; new single‑family homes; single‑family second/third stories; and any residential or residential mixed‑use buildings that do not comply with the applicable design standards in Chapters 17.16 and 17.17. § 17.05.070(B).
    • Minor DR applies to smaller or lower‑impact work (e.g., many alterations to existing residential structures; accessory structures that meet all criteria; minor exterior changes to nonhistoric nonresidential buildings; and similar). § 17.05.080(B).
  • Hearings and noticing
    • Major DR requires public notice and a Planning Commission hearing; story poles can be required to illustrate height/scale. § 17.05.070(D).
  • Findings for approval
    • Major DR findings differ for nonresidential vs. specified single‑family projects; e.g., in the CB district the façade, door placement, and fenestration must connect buildings to the street; in National Register Historic Districts, work must meet the Secretary of the Interior’s Standards. § 17.05.070(E).
    • Minor DR has a concise set of compatibility, standards‑conformance, and public‑services findings. § 17.05.080(D).
  • Exemptions and limits
    • The Director may exempt proposals clearly consistent with findings/standards or simple replacements of features with no substantial design change; certain like‑for‑like disaster reconstructions of conforming dwellings may also be exempt. § 17.05.070(G).
    • The Commission is not to “design” the project; review is limited to professional evaluation against criteria, encouraging applicant initiative. § 17.05.070(F).
  • Expiration
    • Major DR approvals expire after one year; extensions/modifications follow common procedures. § 17.05.070(H)(3).

Major vs. Minor Design Review — at a glance

Topic Major Design Review Minor Design Review Code Reference
Typical triggers New nonresidential buildings/exterior mods ≥500 sq ft visible from street; new single‑family homes; 2nd/3rd‑story SFD additions; HP overlay new work; PD overlay development; projects not meeting district design standards Alterations/additions to existing homes; compliant accessory structures; minor exterior changes to nonhistoric nonresidential buildings; like‑kind repairs § 17.05.070(B); § 17.05.080(B)
Decision-maker Planning Commission (public hearing) Community Development Director (administrative) Table 17.03.030(A)
Key findings Nonresidential: conformance with GP/standards; siting/form/style appropriate; CB-specific street connection; cohesive materials; safety/visibility; historic standards where applicable. Single-family: compatibility with neighborhood and materials/colors appropriateness Conformance with GP/zoning; conformance with design/development standards; ops minimize conflicts; adequate services; CEQA compliance or exemption; no detriment to health/safety/welfare § 17.05.070(E); § 17.05.080(D)
Expiration Expires after 1 year Extensions/modifications per common procedures § 17.05.070(H)(3); § 17.05.080(F)(2)

District-by-district: what Design Review checks against

Design Review enforces each base district’s dimensional and design standards and any overlay rules. Use this as a quick map to the standards your project must meet, alongside the broader zoning framework and land use rules.

LR-1A — Low Density Residential One-Acre Minimum

  • Purpose: Single-family homes, ADUs, and compatible uses; ≤1 du/acre (with limited state-law exceptions). § 17.16.010.
  • Typical permitted uses: Single-family dwellings; home occupations; small/large family day care; accessory structures. § 17.16.020(A) (examples).
  • Key dimensional/design: Min lot area 1 acre; max building height 30 ft; front setback 20–30 ft depending on height; materials limitations (e.g., no vinyl/aluminum siding). Tables 17.16.030(B) and § 17.16.040(A)(5).
  • Where it applies: Low-density neighborhoods citywide.

LR — Low Density Residential

  • Purpose: 1–5 du/acre single-unit and duplex neighborhoods. § 17.16.010.
  • Typical permitted uses: Same general residential pattern as LR‑1A (see table). § 17.16.020(A).
  • Key dimensional/design: Min lot area 7,000 sq ft; height 30 ft/2 stories; front setback 20–30 ft; second-story step‑back in LR: 8 ft unless deep porch provided; prohibited exterior materials. Tables 17.16.030(B); § 17.16.040(A)(2),(5).
  • DR note: New SFDs and second/third stories go to Major DR. § 17.05.070(B)(6)–(7).

MR — Medium Density Residential

  • Purpose: 5.1–16 du/acre for a range of attached/detached units. § 17.16.010.
  • Typical permitted uses: Residential types with multifamily design standards. § 17.16.040(C).
  • Key dimensional/design: Min lot area 6,000 sq ft; height 30 ft/2 stories; frontage/garage placement and articulation rules; multifamily articulation and material-mix requirements. Tables 17.16.030(B); § 17.16.040(C)(1).

HR — High Density Residential

  • Purpose: 16.1–28 du/acre multifamily and compatible uses. § 17.16.010.
  • Key dimensional/design: Min lot area 7,000 sq ft; height 42 ft/3 stories with additional upper-story controls; detailed wall plane and material requirements extend citywide. Table 17.16.030(B); § 17.16.040.

CB — Central Business

  • Purpose: Pedestrian‑oriented downtown retail/services with upper‑floor office/residential; focus along Main Street. § 17.17.010.
  • Typical permitted uses: Retail, personal services, offices, restaurants, hotels/motels, public/quasi-public. § 17.17.010.
  • Key dimensional/design: FAR up to 2.0; typical height 35–46 ft based on location/roof form; strict frontage build-to on Main Street; articulation and façade rules; in Major DR, façade/door/window placement must connect to street. Table 17.17.030(B); § 17.17.040; § 17.05.070(E)(1)(c).

SC — Service Commercial

  • Purpose: Auto‑oriented and service retail not suited to CB; primarily resident‑serving along SR‑29 corridor. § 17.17.010.
  • Key dimensional/design: FAR 0.50; building transparency and parking placement standards; curb-cut limits. Table 17.17.030(B); § 17.17.040(F),(3).

MU — Mixed‑Use

  • Purpose: Medium/high‑density housing with retail/office/restaurant and open space; supports both vertical and horizontal mixed‑use. § 17.17.010.
  • Key dimensional/design: Up to 20 du/ac; FAR 1.0; front build‑to pattern and street‑oriented entries; residentially-dominant MU buildings must also meet § 17.16.040 standards. Table 17.17.030(B); § 17.17.040(C).

BPO — Business and Professional Office

  • Purpose: Professional/medical/administrative offices; upper‑floor residential can be considered. § 17.18.010.
  • Key dimensional/design: FAR 0.50; height 30 ft; landscaped area minimums; buffers to ag/residential uses. Table 17.18.030(B).

I — Industrial

  • Purpose: Industrial parks, warehouses, light manufacturing, winery/viticulture support. § 17.18.010.
  • Key dimensional/design: FAR 0.50–0.60 (by warehousing share); height 45 ft (reduced near residential/A‑20/W); setbacks and landscape buffers. Table 17.18.030(B).

A‑20 — Twenty‑Acre Agriculture

  • Purpose: Preserve agriculture and manage low‑density residential as urban edge evolves. § 17.19.010.
  • Typical permitted uses: Agriculture, single‑family (with restrictions), agricultural employee housing (conditions apply). § 17.19.020(A) (examples).
  • Key dimensional/design: Large setbacks measured from street centerlines; max coverage; waterways setbacks. Table 17.19.030(B).

W — Winery

  • Purpose: Winery and winery‑related uses within the Agriculture GP designation. § 17.19.010.
  • Typical permitted uses: Winery operations; tanks (CUP); wine warehousing (CUP). § 17.19.020(A).
  • Key dimensional/design: Larger setbacks and coverage controls; waterways setbacks. Table 17.19.030(B).
  • DR note: Indoor tanks can avoid DR; outdoor equipment near R zones or major roads typically needs a CUP; DR may still apply to structures. § 17.19.020 End Notes.

WW — Woodlands and Watershed

  • Purpose: Sensitive residential development that minimizes natural‑resource impacts. § 17.19.010.
  • Key dimensional/design: Deep setbacks and special open‑space/stream‑corridor constraints. Table 17.19.030(B).

PQP — Public & Quasi‑Public; PR — Parks & Recreation; OS — Open Space

  • Purpose: Civic facilities, parks, and natural open space (OS aligned with stream corridors like the Napa River and Sulphur Springs Creek). § 17.20.010.
  • Key dimensional/design: FAR and coverage caps (e.g., PQP FAR 0.15–0.5); generous setbacks; waterway setbacks. Table 17.20.030(B); § 17.20.040(C) (OS stream‑corridor guidance).
  • DR note: Trash enclosures and similar site elements can be addressed or waived via Design Review. § 17.20.040(B).

HP — Historic Preservation Overlay

  • What Design Review checks: Rehabilitation consistent with HP standards may be approved administratively; otherwise, the Planning Commission conducts Major DR. New construction/additions visible from public ROW or >25% floor‑area increase require Major DR. § 17.21.040(D)(5)–(F).
  • Relation to Major DR: HP area new work is a Major DR trigger unless limited façade work conforms to HP standards. § 17.05.070(B)(3).
  • Also see St. Helena Historic Preservation.

PD — Planned Development Overlay

  • Relationship to Design Review: Before building permits, development within a PD overlay must obtain Major DR approval under § 17.05.070. § 17.21.050(F)(3).
  • PD districts set their own site/architectural standards that supersede base-district standards where conflicts exist; Design Review ensures the adopted PD standards are met. § 17.21.050(B).

Cross-references often evaluated in Design Review

  • Residential design standards: entrances, articulation, materials, step‑backs, and parking placement. § 17.16.040.
  • Commercial/mixed-use design standards: building orientation, articulation, façades, awnings/canopies, upper‑story window proportions, and corridor‑specific rules (e.g., Highway 29 area). § 17.17.040.
  • Business/industrial design standards: Div. IV citywide standards and buffers. § 17.18.040; Table 17.18.030(B).
  • Variances: If a variance concerns a new building or addition, Major DR must be approved prior to or concurrent with the variance. § 17.11.020(B)(4). See also Variances and Exceptions.

Checklist

  • Confirm your base district and any overlays on the zoning map context; identify if HP or PD overlays apply. § 17.21.005.
  • Determine review type using triggers in § 17.05.070(B) (Major) vs. § 17.05.080(B) (Minor).
  • Prepare plans that demonstrate conformance with all applicable design and development standards for your district (e.g., § 17.16.040; § 17.17.040; Table 17.17.030(B)).
  • If Major DR: follow application, noticing, and hearing procedures; be ready for potential story poles. § 17.05.070(C)–(D).
  • If Minor DR: incorporate standards and await Director’s determination during building‑permit review; no separate DR application is required. § 17.05.080(C),(E).
  • Address findings: show compatibility, conformance to standards, and context‑appropriate materials/massing; for CB and HP, address district‑specific findings. § 17.05.070(E); § 17.05.080(D).
  • Coordinate related approvals if needed (e.g., CUP, variance) and ensure DR occurs prior to or with those approvals. § 17.11.020(B)(4).

Risks & Ambiguities

Issue Why it matters What to verify
500 sq ft threshold for nonresidential exterior work Crossing it turns many façade/massing updates into Major DR with hearing Whether your cumulative exterior change is ≥500 sq ft and visible from public ROW. § 17.05.070(B)(1).
Second/third-story additions on SFDs Always Major DR; neighborhood fit and privacy become findings issues Story‑pole requirement, step‑backs, and material compatibility. § 17.05.070(B)(7), (E)(2).
HP overlay work New work/additions visible from ROW or >25% expansion require Major DR Whether your scope qualifies for administrative HP review vs. Commission DR. § 17.21.040(D)(5), (F).
PD overlay projects DR must be obtained before building permits Timing your Major DR with PD conditions and plans. § 17.21.050(F)(3).
CB district street connection Façade/doors/windows must engage the street in DR findings Ground-floor design and transparency strategy. § 17.05.070(E)(1)(c).
Approval expiration Major DR expires after one year Construction start timing and need for extension under common procedures. § 17.05.070(H)(3).

Plain-English Summary

If your project changes what people see from the street, expect Design Review. Small, compliant tweaks are handled by staff as Minor DR; bigger or more visible changes—like a new house, a second floor, a new storefront, or work in historic/PD areas—go to the Planning Commission as Major DR. The approval hinges on fitting your district’s rules for height, setbacks, architecture, and street presence, so start by confirming your zoning and overlay, then design to those standards.

Information Gaps

  • “Site plan review” and “architectural review board” are not identified in the retrieved Title 17 materials; Design Review is the controlling process. Not found in retrieved materials.

Source References

  • § 17.05.070 Major Design Review (purpose, triggers, procedures, findings, exemptions, expiration).
  • § 17.05.080 Minor Design Review (purpose, applicability, findings, procedures).
  • Table 17.03.030(A) Approval Authorities.
  • § 17.16.010–.040 Residential districts (purpose; design standards).
  • § 17.17.010–.040 Commercial/MU districts (purpose; design standards; development standards).
  • § 17.18.010–.040 Business/Industrial (purpose; development/design standards).
  • § 17.19.010–.030 Agriculture/Natural Resource (purpose; development standards; use notes).
  • § 17.20.010–.040 Public/Open Space (purpose; standards; DR-related supplemental standards).
  • § 17.21.040 Historic Preservation Overlay; § 17.21.050 Planned Development Overlay.
  • § 17.11.020 Variances (DR timing).

Sources

Retrieved passages

  • St. Helena Zoning Code (Section 17.05.070) High relevance
  • St. Helena Zoning Code (Section 17.04.080) High relevance
  • St. Helena Zoning Code (Title 17) High relevance
  • St. Helena Zoning Code (Title 17) High relevance
  • St. Helena Zoning Code (Title 17) High relevance
  • St. Helena Zoning Code (Title 17) High relevance
  • St. Helena Zoning Code (Title 17) High relevance
  • St. Helena Zoning Code (Title 17) High relevance
  • St. Helena Zoning Code (§ 5) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Section Section) Medium relevance
  • St. Helena Zoning Code (Section 17.05.070) Medium relevance
  • St. Helena Zoning Code (Chapter 17.25) Medium relevance
  • St. Helena Zoning Code (§ 5) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (Section 15.36.100) Medium relevance
  • St. Helena Zoning Code (Chapter 17.19) Medium relevance
  • St. Helena Zoning Code (Title 17) Medium relevance
  • St. Helena Zoning Code (§ 5) Medium relevance
  • St. Helena Zoning Code (Section 17021.6) Medium relevance
  • CFC § 5 (Title 17) Medium relevance

Cited sections

Frequently asked questions

Do I need design review to add a second story to my single-family home?

Yes. Additions that create a second or third story, or add space to an existing upper story, require Major Design Review with a Planning Commission hearing. § 17.05.070(B)(7).

When does a commercial storefront remodel trigger Major Design Review?

If the exterior modification is 500 sq ft or more, is visible from a public street or alley, and is not a Minor Design Review activity, it requires Major DR. § 17.05.070(B)(1).

Are projects in the Historic Preservation overlay treated differently?

Yes. New construction and additions in the HP overlay are Major DR, and non‑conforming façade changes require Planning Commission review. Limited façade work consistent with HP standards can be processed without Major DR. § 17.05.070(B)(3); § 17.21.040(D)(5).

What findings will the Planning Commission use to approve my project?

For nonresidential, the Commission considers design standards conformance, context‑appropriate siting/style, cohesive materials, and in the CB district specifically, façade/door/fenestration connecting to the street. For new/upper‑story SFDs, compatibility and appropriate materials/colors are emphasized. § 17.05.070(E).

Who decides Minor vs. Major Design Review in St. Helena?

The code defines triggers; the Community Development Director administers Minor DR, while the Planning Commission decides Major DR at a public hearing. Appeals follow Table 17.03.030(A). § 17.05.070; § 17.05.080; Table 17.03.030(A).

Does Design Review cover projects in a PD overlay?

Yes. Development within a PD overlay must obtain Major DR approval before building permits issue; PD standards prevail over base-zone standards where they conflict. § 17.21.050(B), (F)(3).

How long is a Major Design Review approval valid?

One year, unless extended under common procedures for permit extensions. § 17.05.070(H)(3).

If I need a variance for setbacks, when does Design Review happen?

If the variance involves a new building or an addition, Major Design Review must be approved prior to or at the same time as the variance. § 17.11.020(B)(4).

More in St. Helena code

Ask about any St. Helena property

Get a cited, plain-English answer on St. Helena zoning, setbacks, FAR, ADUs and permits — for any address.

Start Free Trial

More St. Helena zoning topics

St. Helena Zoning

St. Helena Land Use

St. Helena Development Standards

St. Helena Parking

St. Helena Overlay Districts

St. Helena Historic Preservation

St. Helena Signage

St. Helena Nonconforming Uses

St. Helena Variances and Exceptions

St. Helena Landscaping and Screening

St. Helena overview