Local zoning · Dunsmuir

Dunsmuir — Zoning

Zoning under the Dunsmuir local zoning and planning code, with the controlling citations.

Ask a question free See coverage

Last reviewed: July 2, 2026

Overview

Dunsmuir's zoning rules are codified in Title 17 — The City of Dunsmuir Zoning Code. The code establishes a citywide set of base zoning districts (residential, mixed‑use, commercial, manufacturing, public/open space, planned development) plus at least one combining district (Historic). The legal district boundaries are shown on the City of Dunsmuir Zoning Map (on file with the City Clerk) and unclear boundaries are resolved by the Planning Commission or by the map rules in the code. § 17.12.020 and the districts list specify the districts and mapping rules.

When you read the summaries below, note that specific parking rules are set in the Dunsmuir Parking chapter (Chapter 17.76) and some dimensional or design requirements are handled in the Dunsmuir Development Standards and the objective design chapter (17.132). For accessory units see the Dunsmuir ADUs chapter (17.116). For historic‑district requirements see Dunsmuir Historic Preservation. Links to these related topics appear on their first natural mention above.

How the code defines and maps zoning

  • The list of base zoning districts is in § 17.12.010: R-1, R-2, R-3, MU-1, MU-2, MU-3, T-C, S-C, L-M, M, O-S, P-F, and P-D. A combining district H (Historic) is available.
  • The official zoning map is the "City of Dunsmuir Zoning Map" and is made part of Title 17 by reference; the map is on file with the City Clerk. Any unmapped annexed land receives R-1 prezoning unless otherwise set by Council (§ 17.12.020–17.12.040).
  • Rules for uncertain boundaries: map lines that follow parcels, roads/centerlines, or natural features are construed accordingly; the Planning Commission resolves other ambiguities (§ 17.12.030).

Verify the zoning for a specific parcel with the City Clerk because the map itself (not the text summary) controls location. § 17.12.020.

District-by-district breakdown

Below each district heading lists the purpose, typical permitted uses, key dimensional/development standards, and where the district applies (map). All bullets cite the ordinance sections.

R-1 — Low Density Residential

  • Purpose: intended for low‑density residential consistent with the General Plan. § 17.16.010.
  • Typical permitted uses: single‑family residential, residential care homes, small employee housing, supportive and transitional housing. Accessory uses include Accessory Dwelling Units (ADUs), cottage food operations, family childcare, home occupations, second units, and short‑term rentals as listed in § 17.16.020–17.16.030.
  • Key standards (where they apply in the district): minimum parcel sizes and dimensions in § 17.16.050; development standards include 1–6 du/acre, maximum building height 30 ft (45 ft for places of worship; accessory structures 15 ft), maximum lot coverage 40%, front setback 20 ft, rear 20 ft (accessory 5 ft), side interior 5 ft / exterior 10 ft (nonresidential side 10 ft; accessory side 20 ft) — all in § 17.16.060.
  • Where: applies to parcels shown R‑1 on the zoning map; annexed territory defaults to R‑1 unless Council acts (§ 17.12.020–17.12.040).

R-2 — Medium Density Residential

  • Purpose: for a mix of low and medium density residential uses. § 17.20.010.
  • Typical permitted uses: duplexes, multifamily, single‑family, supportive housing and similar residential uses (see § 17.20.020).
  • Key standards: dwelling units per acre 1–12, building height commonly 30 ft (exceptions), lot coverage 50%, front/rear/side setbacks commonly 20/20/5–10 ft depending on use and yard type — see § 17.20.060 for the full matrix.

R-3 — High Density Residential

  • Purpose: support a range of densities (including multifamily) in areas matched to the High Density Residential land use designation. § 17.24.010.
  • Typical permitted uses: multifamily, duplexes, dormitories, residential care homes, small employee housing, supportive and transitional housing, and single‑family (see § 17.24.020–030).
  • Key standards: up to 12 du/acre by default, building height 30 ft (places of worship 45 ft), lot coverage 50%, setbacks and parking per § 17.24.060 and Chapter 17.76 for parking.

MU-1, MU-2, MU-3 — Residential / Neighborhood / Central Mixed Use

  • Purpose: mix residential and compatible commercial/professional uses at varying intensity:
    • MU-1: Residential Mixed Use (lower intensity). § 17.28.010.
    • MU-2: Neighborhood Mixed Use (near major roadways). § 17.32.010.
    • MU-3: Central Mixed Use (higher intensity; development standards in Chapter 17.36). § 17.36.
  • Typical permitted uses: artist studios, professional offices, personal services, retail, live/work, residential types including duplex/multifamily/single family, public uses, and mixed‑use projects (see each chapter's permitted uses). §§ 17.28.020, 17.32.020, 17.36.020.
  • Key standards: density ranges vary by MU district; building heights up to 50 ft in many mixed‑use districts (with lower heights for single‑family), lot coverage typically 75%, setbacks often 10–25 ft depending on district and adjacency; parking rules follow Chapter 17.76 (see § 17.36.060 and related).

T-C — Town Center

  • Purpose: encourage a pedestrian‑friendly, mixed‑use commercial core (includes the Dunsmuir Historic Commercial District area). § 17.40.010.
  • Typical permitted uses: broad retail, restaurants, offices, hotels/hostels, entertainment, civic, some residential (including vertical mixed‑use) — see § 17.40.020.
  • Key standards: T‑C accommodates limited off‑street parking and encourages pedestrian orientation; development standards and parking relaxations are addressed across § 17.40 and Chapter 17.76.

S-C — Service Commercial (often Chapter 17.44)

  • Purpose: service‑oriented commercial uses needing larger lots or street access. See Chapter 17.44 for lot sizes and standards.
  • Typical uses: retail food, automotive services (with restrictions), business services — see § 17.44.020–030.
  • Key standards: minimum parcel sizes and development standards (front/rear/side setbacks, height 50 ft in many nonresidential districts), see § 17.44.050–060.

L-M — Light Manufacturing

  • Purpose: heavier commercial and light industrial where impacts are limited (noise, odor, dust). § 17.48.010.
  • Typical uses: artisan manufacturing, equipment sales, vehicle-related businesses, craft food and beverage production, mixed‑use developments with industrial components. § 17.48.020.
  • Key standards: minimum parcel size 7,500 sq ft, minimum width 75 ft, depth 100 ft, building height generally 50 ft, lot coverage 75%, setbacks 25 ft front, side/rear standards and screening where adjacent to other zones — see § 17.48.050–060.

M — Manufacturing

  • Purpose and specifics: manufacturing provisions and permitted uses are listed under the Manufacturing chapter (see Title 17 chapters for M‑district specifics). Where manufacturing appears in overlay adjacency rules the code spells out required screening and setbacks. Not all manufacturing details are excerpted here; verify M‑chapter for parcel‑level rules. Not found in retrieved materials for full M‑chapter text.

O-S — Open Space

  • Purpose: protect parks, river, recreation and natural areas (§ 17.56.010). Permitted uses include parks, resource protection and resource‑related recreation; accessory uses include certified farmers' markets and mobile food sales. § 17.56.020–030.

P-F — Public Facilities

  • Purpose: public infrastructure and facilities (airports, wastewater, etc. as conditional uses). Development standards include no minimum lot size, building height up to 50 ft, setbacks 10 ft for front/side/rear in many cases. See § 17.60.040–060.

P-D — Planned Development

  • Purpose: flexible district allowing mixed configurations under an approved development plan; requires approval findings by Planning Commission and City Council. See Chapter 17.64 for process, required findings, and that the P‑D ordinance references the approved development plan.

Combining district H (Historic)

  • Purpose: implements historic preservation rules when added to any base zone; uses/standards default to the base zone but the Historic chapter can supersede where conflicts occur. Properties inside the Historic overlay are also subject to the Historic Preservation procedures and review. See § 17.68.030.

Quick reference table — most decision‑relevant districts (high level)

District Typical permitted uses (short) Key standards (high level) Code reference
R-1 Single‑family, residential care homes, ADUs allowed as accessory 1–6 du/acre, 30 ft height, 40% lot coverage, 20 ft front setback § 17.16.020–060
R-2 Duplex/mixed residential 1–12 du/acre, 30 ft height, 50% coverage, setbacks vary § 17.20.020–060
R-3 Multifamily, dormitories Higher density allowances; similar height and setback rules; parking per Ch. 17.76 § 17.24.020–060
MU-1/MU-2/MU-3 Mixed use: residential + small retail/offices/live‑work Higher lot coverage (up to 75%), heights up to 50 ft, mixed‑use parking rules § 17.28 / 17.32 / 17.36
T-C Pedestrian commercial, vertical mixed‑use Designed for limited off‑street parking; pedestrian orientation § 17.40.010–030
L-M Light manufacturing, craft production 7,500 sq ft min lot, 50 ft height, screening adjacent zones § 17.48.010–060
O-S / P-F Parks, natural resources / public facilities O‑S protects open space uses; P‑F uses often have no min parcel size; heights may reach 50 ft § 17.56 / 17.60
H (Historic) Overlay applied to base zone Base uses apply but historic review/sign rules may add conditions § 17.68.030

How special rules interact (practical guidance)

  • Parking: required parking spaces for a project are determined by Chapter 17.76; some multifamily projects near transit or inside historic districts may have reduced or no parking per Government Code references adopted into the code (see 17.76.020 and the objective standards/parking adjustments in 17.132). Always check Chapter 17.76 early; it will control number and design of spaces.
  • ADUs: accessory dwelling units and junior ADUs are governed by Chapter 17.116; many ADU procedural and parking waivers are ministerial and must meet the chapter criteria (owner occupancy, size limits, setbacks, parking exemptions). See 17.116 for the checklist and ministerial approval rules. Dunsmuir ADUs
  • Design & objective standards: larger multifamily or mixed‑use residential projects that seek streamlined (ministerial) processing must meet the objective design standards in Chapter 17.132 — review the objective standards early if you intend to use state streamlined pathways.
  • Historic overlay: properties in the H combining district follow additional review and sign guidelines; historic delegates and the Planning Commission participate in approvals for alterations or signage in the district. See Chapter 17.68. Dunsmuir Historic Preservation
  • Uses requiring discretionary action: conditional uses and variances are processed under Chapter 17.88; administrative permits are available for a limited set of uses — plan on public hearings for CUPs and variances.

Checklist (what an applicant must satisfy before construction/use)

  • Confirm current zoning and precise district boundaries on the official zoning map (City Clerk) per § 17.12.020.
  • Confirm the proposed use is permitted, accessory, or conditional in that district (check the district's Permitted Uses/CU list — e.g., § 17.16.020, 17.28.020, 17.40.020).
  • Confirm dimensional standards (setbacks, height, lot coverage, FAR if applicable) in the district's Development Standards (e.g., § 17.16.060, 17.48.060, 17.36.060).
  • Calculate parking per Chapter 17.76 and confirm any exemptions (historic district, transit proximity) and design standards. Dunsmuir Parking
  • If you propose an ADU, follow Chapter 17.116 ADU rules and ministerial application process. Dunsmuir ADUs
  • If the site is in the H (Historic) overlay or the Dunsmuir Historic Commercial District, factor historic review requirements and sign guidelines (Chapter 17.68). Dunsmuir Historic Preservation
  • If the project is multifamily/mixed‑use and you want streamlined processing, confirm compliance with Chapter 17.132 objective design standards.
  • For any change in use or dimensional relief, prepare for use permits or variances under Chapter 17.88.

Risks & Ambiguities

Issue Why it matters What to verify
Map vs. text boundary conflicts The Zoning Map controls location; ambiguous boundaries can shift allowed uses Verify the parcel's zoning on the official City map; if a boundary is ambiguous request Planning Commission clarification per § 17.12.030.
Historic overlay restrictions Historic overlay may impose additional review, different sign rules, and possible denial/conditions Check whether the property is within the H combining district or the Dunsmuir Historic Commercial District and apply Chapter 17.68 rules.
Parking calculations for mixed projects Parking requirements drive site layout and can trigger required variances Confirm parking counts and exemptions under Chapter 17.76; check transit/historic exemptions in 17.76.020 and objective standards 17.132.
“Similar use” determinations Planning Commission may interpret permitted uses as similar (discretion) If your use is not listed exactly, you may need a similar use determination or CUP; follow the process in the applicable district chapter and Chapter 17.72 (similar use determinations). Not found in retrieved materials for full Chapter 17.72 text — Verify with Planning staff.
Parcel-specific dimensional exceptions Some setbacks/coverage rules have adjacency‑based exceptions Verify adjacent zoning (e.g., L‑M or M adjacency rules) in each district's development standards (see 17.44, 17.48) and confirm whether screening is required.

Plain-English Summary

Dunsmuir’s Title 17 sets a citywide zoning map and named districts (R‑1/R‑2/R‑3 for residential; MU‑1/2/3 and T‑C for mixed‑use/commercial; L‑M/M for manufacturing; O‑S/P‑F/P‑D for open/public/planned), each with explicit permitted uses, setbacks, heights, lot coverage, and parking rules. Always check the official zoning map at the City Clerk and the district chapter for the exact permitted uses and dimensional limits; parking and ADU rules are in separate chapters that frequently affect site design.

Source References

  • § 17.12.010 — Districts designated (list of base and combining districts).
  • § 17.12.020–17.12.050 — Zoning map, uncertain boundaries, prezoning, split zoning.
  • Chapter 17.16 (R‑1) — Permitted uses, accessory uses, lot requirements, development standards § 17.16.020–060.
  • Chapter 17.20 (R‑2), Chapter 17.24 (R‑3), Chapter 17.28 (MU‑1), Chapter 17.32 (MU‑2), Chapter 17.36 (MU‑3).
  • Chapter 17.40 (T‑C Town Center).
  • Chapter 17.44 (Service Commercial) and Chapter 17.48 (Light Manufacturing L‑M).
  • Chapter 17.56 (O‑S Open Space) and Chapter 17.60 (P‑F Public Facilities).
  • Chapter 17.64 (Planned Development P‑D).
  • Chapter 17.68 (Historic Preservation / H overlay). Dunsmuir Historic Preservation
  • Chapter 17.76 (Off‑Street Parking). Dunsmuir Parking
  • Chapter 17.80 (Signs) and historic‑district sign rules. Dunsmuir Signage
  • Chapter 17.84 (Nonconforming Uses). Dunsmuir Nonconforming Uses
  • Chapter 17.88 (Use Permits & Variances). Dunsmuir Variances and Exceptions
  • Chapter 17.116 (Accessory Dwelling Units). Dunsmuir ADUs
  • Chapter 17.132 (Objective Design Standards).

Sources

Retrieved passages

  • CBC § 17.92.180 (Section 17.92.180) High relevance
  • Dunsmuir Zoning Code (title by) High relevance
  • CBC § 17.92.150 (Chapter 17.76) High relevance
  • Dunsmuir Zoning Code (§ I) High relevance
  • Dunsmuir Zoning Code (Title 17) High relevance
  • Dunsmuir Zoning Code (§ I) High relevance
  • CBC § 040 (§ I) High relevance
  • CBC § 17.92.180 (Section 17.92.180) High relevance
  • Dunsmuir Zoning Code (Chapter 17.04) High relevance
  • Dunsmuir Zoning Code (section shall) Medium relevance
  • Dunsmuir Zoning Code (§ I) Medium relevance
  • Dunsmuir Zoning Code (§ I) Medium relevance
  • CBC § 010 (Chapter 17.84) Medium relevance
  • Dunsmuir Zoning Code (Section 65915) Medium relevance

Cited sections

Frequently asked questions

What can I build on an R-1 lot in Dunsmuir?

On an R-1 lot you may build single‑family residential and related accessory uses listed in § 17.16.020–030, including Accessory Dwelling Units (ADUs) if they meet Chapter 17.116 criteria. Dimensional limits (setbacks, height, coverage) are in § 17.16.050–060; verify the parcel on the zoning map first.

What are Dunsmuir setback requirements for R‑1?

Typical R‑1 setbacks: front 20 ft, rear 20 ft (accessory rear 5 ft), side interior 5 ft, exterior side 10 ft; these appear in § 17.16.060 — confirm for your lot type and exceptions.

Do I need design review in Dunsmuir?

Large multifamily or mixed‑use residential projects seeking state streamlined processing must meet the objective design standards in Chapter 17.132; otherwise design/site plan review requirements are found across Title 17 and district chapters. Check Chapter 17.132 if pursuing ministerial streamlined review or read the applicable district chapter for site plan rules.

Where is the official zoning map and how do I know my parcel’s zone?

The official "City of Dunsmuir Zoning Map" is on file in the City Clerk’s office and is made part of Title 17 by reference in § 17.12.020. If a map boundary is uncertain, the code gives rules (property line, centerline of roads/creeks) and the Planning Commission may resolve ambiguities under § 17.12.030.

Can I put a commercial use in T‑C or MU zones?

Yes — T‑C and the MU districts expressly allow a broad set of retail, office, personal services and some lodging/residential combinations. Check the district permitted use lists (e.g., § 17.40.020, § 17.28.020, § 17.32.020) and confirm whether your specific activity requires a conditional use permit.

Are ADUs allowed everywhere in Dunsmuir?

ADUs are permitted as accessory uses in residential and many mixed‑use districts via Chapter 17.116; the city provides ministerial approval pathways consistent with state ADU law, but you must meet the chapter’s size, setback, parking, and application requirements. See Chapter 17.116 for details. Dunsmuir ADUs

What happens if my building was legal before the current code but now doesn't comply?

Nonconforming uses and structures may continue under Chapter 17.84, but expansions, intensifications, or rebuilds are limited and subject to the chapter’s restrictions; some modifications require use permits or compliance with current standards. Check Chapter 17.84 before planning changes.

If my parcel is inside the Historic overlay, do base zoning rules change?

Base uses and development standards still apply, but the Historic combining district (H) adds review requirements and may supersede or add conditions (see § 17.68.030). Sign permits, alterations, and demolitions within the historic district follow the Historic chapter’s procedures.

How are parking requirements calculated for a mixed‑use project?

Calculate parking per Chapter 17.76; where state law or objective design standards apply (e.g., transit proximity, historic district), parking requirements may be reduced — see 17.76.020 and Chapter 17.132 for applicable exemptions and design standards. Dunsmuir Parking

Do I need a use permit or a variance for something not listed as permitted?

If your proposed use is not explicitly permitted, you may need a similar use determination, a conditional use permit, or a variance under Chapter 17.88. Administrative permits exist for a narrow set of uses; expect discretionary review, findings, and possible public hearings for CUPs/variances. ---

More in Dunsmuir code

Ask about any Dunsmuir property

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

Start Free Trial

More Dunsmuir zoning topics

Dunsmuir Land Use

Dunsmuir Development Standards

Dunsmuir Parking

Dunsmuir Design Review

Dunsmuir Overlay Districts

Dunsmuir Historic Preservation

Dunsmuir Signage

Dunsmuir Nonconforming Uses

Dunsmuir Variances and Exceptions

Dunsmuir Landscaping and Screening

Dunsmuir overview