Sonoma County — Land Use

Last reviewed: July 6, 2026

Overview

In unincorporated areas of Sonoma County, land use is governed by Chapter 26 of the Sonoma County Zoning Regulations, which organize property into base zoning districts and “combining” (overlay) districts that can add or limit what you can do on a site. The ordinance uses district-specific allowed-use tables to say what is permitted by right, what needs a use permit, and what is prohibited. Start at the Sonoma County zoning & planning overview, then confirm your base district on the County zoning map and read the correct allowed-use table in Chapter 26.

Key rule: If a use is not listed in an allowed-use table, it is not allowed—unless the Planning Director determines it is “equivalent” (similar and compatible) to a listed permitted or conditional use for that zone. See § 26-06-030(C) for agricultural/resource zones and § 26-12-030(F) for industrial zones.

How the tables read (applies across zone families): P = permitted by right, P* = permitted with discretionary criteria, C = conditional use (use permit required), “-” = prohibited, and some uses send you to “Use Regulations” for zone-wide or use-specific standards. See § 26-08-030 (residential), § 26-10-030 (commercial), § 26-12-030 (industrial), and § 26-14-030 (special purpose).

For development metrics like setbacks, lot size, height, and coverage, see the Sonoma County Development Standards. Many projects also require design review, and nearly all must meet parking standards.

How base zoning maps to the General Plan

The ordinance ties base zoning to General Plan land use categories—for example, LIA to Land Intensive Agriculture and R1 to Urban Residential (low density). Use § 26-01-010 to confirm which districts commonly implement each General Plan category in unincorporated areas.

Quick-view: Allowed-use framework (selected highlights)

Note: Always consult the “Use Regulations” column for zone-wide or use-specific standards. For example, agricultural support services thresholds appear in § 26-18-050.

District-by-district guide (unincorporated areas)

Below, “Where it applies” references how § 26-01-010 maps zoning to General Plan land-use categories. Always confirm overlays/combining districts and development standards before finalizing a use.

Agricultural & Resource Districts

• LIA — Land Intensive Agriculture

  • Purpose: Agricultural production on prime farmland (General Plan “Land Intensive Agriculture”).
  • Typical permitted uses: Crop production (P); beekeeping (P); small-scale ag processing (P*). Allowed-use table controls. § 26-06-030.
  • Common conditional uses: Agricultural processing (C); confined farm animals (P/C per criteria). See “Use Regulations” like § 26-18-040, § 26-18-070.
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: Implements GP “Land Intensive Agriculture.” § 26-01-010.

• LEA — Land Extensive Agriculture

  • Purpose: Extensive ag and rangeland (General Plan “Land Extensive Agriculture”).
  • Uses: Similar to LIA; see Table 6-1. § 26-06-030.
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Land Extensive Agriculture.” § 26-01-010.

• DA — Diverse Agriculture

  • Purpose: Mixed agricultural activities (General Plan “Diverse Agriculture”).
  • Uses: Crop production (P); beekeeping (P); small-scale ag processing (P*); support services (P*/C). § 26-06-030; § 26-18-050.
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Diverse Agriculture.” § 26-01-010.

• RRD — Resources and Rural Development

  • Purpose: Protects timber, geothermal, aggregate, watershed, habitat, and low-intensity recreation; allows very low-density residential where compatible. Noted in Article 6. Not found in retrieved materials for a specific § header; confirm with the County.
  • Uses: See Table 6-1; ag/resource uses typical; some non-residential uses may be allowed by Director equivalency per § 26-06-030(C)(2).
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Resources and Rural Development.” § 26-01-010.

• TP — Timberland Production

  • Purpose: Timberland zoning consistent with state forest taxation law; specifies compatible uses. Not found in retrieved materials for a specific § header; confirm with the County.
  • Uses: See Table 6-1; Director may deem a similar non-residential use “equivalent” only if listed as permitted in TP. § 26-06-030(C)(3).
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Resources and Rural Development.” § 26-01-010.

Residential Districts

• AR — Agriculture and Residential

  • Purpose: Areas for raising crops/farm animals with rural residential use. § 26-08-020.
  • Typical permitted uses: Single-family housing; crop production; beekeeping; certain farm animals. § 26-08-030 Table 8-1.
  • Common conditional uses: Agricultural processing (C); farm retail sales (C). See “Use Regulations” cited in Table 8-1. § 26-08-030.
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Rural Residential.” § 26-01-010.

• RR — Rural Residential

  • Purpose: Preserve rural character; low-density residential. § 26-08-020.
  • Uses: Single-family; some ag uses (crop production/beekeeping P). § 26-08-030.
  • Design review: Planned developments/condos 4+ units require design review. § 26-08-030(B)(1)(a).
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Rural Residential” or “Urban Residential” (as mapped). § 26-01-010.

• R1 — Low Density Residential

  • Purpose: Stabilize/protect low-density single-family neighborhoods. § 26-08-020.
  • Uses: See Table 8-1; typical residential uses by right; some ag-related small-scale uses allowed. § 26-08-030.
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Urban Residential.” § 26-01-010.

• R2 — Medium Density Residential

  • Purpose: Variety of dwelling types at moderate densities. § 26-08-020.
  • Uses: See Table 8-1; multi-family permitted as specified; cottage housing may require design review. § 26-08-030(B)(1)(c).
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Urban Residential.” § 26-01-010.

• R3 — High Density Residential

  • Purpose: Higher-density dwellings with adequate light/air/privacy. § 26-08-020.
  • Uses: See Table 8-1; dwelling groups/apartments 4+ units require design review. § 26-08-030(B)(1)(b).
  • Key dimensional standards: Not found in retrieved materials.
  • Where it applies: GP “Urban Residential.” § 26-01-010.

Commercial Districts

• The commercial article lists allowed uses by district in Table 10-1 and requires design review for all allowed uses except in AS. § 26-10-030(A)-(B).

• District purposes (high level): LC serves daily retail/services; CR mixes rural residential/commercial; AS supports agricultural production; K serves recreation/visitor uses. Not found in retrieved materials with a specific § header; confirm with the County. Allowed uses are controlled by § 26-10-030.

• CO — Administrative and Professional Office: Uses per Table 10-1; design review required. § 26-10-030.

• C1 — Neighborhood Commercial: Uses per Table 10-1; design review required. § 26-10-030.

• C2 — Retail Business: Uses per Table 10-1; design review required. § 26-10-030.

• C3 — Heavy Commercial: Uses per Table 10-1; design review required. § 26-10-030.

• LC — Limited Commercial: Neighborhood/daily needs retail/services; uses per Table 10-1. § 26-10-030.

• CR — Commercial Rural: Rural-serving mix with discretionary review emphasis; uses per Table 10-1. § 26-10-030.

• AS — Agricultural Services: Ag-support uses; design review not required. § 26-10-030(B)(1).

• K — Recreation and Visitor-Serving Commercial: Visitor/recreation uses; uses per Table 10-1. § 26-10-030.

Key dimensional standards for commercial (setbacks, lot size, height) are in the development standards tables for Article 10. Not found in retrieved materials.

Industrial Districts

• Article 12 states the purpose and allowed uses for industrial zones and includes a development standards table. § 26-12-020, § 26-12-030, § 26-12-040.

• MP — Industrial Park

  • Purpose: Research, light manufacturing, assembly, HQ office in modern park settings. § 26-12-020(B)(1).
  • Uses: See Table 12-1; labs (P). § 26-12-030.
  • Key dimensional standards: See Table 12-2 (e.g., minimum lot 1.5 acres without public water/sewer). § 26-12-040.

• M1 — Limited Urban Industrial

  • Purpose: Industrial within urban service areas; scale limited by compatibility/environment. § 26-12-020(B)(2).
  • Uses: See Table 12-1; labs (P), laundry plants (P). § 26-12-030.
  • Key dimensional standards: See Table 12-2 (e.g., min lot 1.5 acres w/o public services; 20,000 sf with sewer). § 26-12-040.

• M2 — Heavy Industrial

  • Purpose: Wide range of industrial uses in urban service areas. § 26-12-020(B)(3).
  • Uses: See Table 12-1; some heavier processes (C). § 26-12-030.
  • Key dimensional standards: See Table 12-2 (e.g., min lot 20,000 sf). § 26-12-040.

• M3 — Limited Rural Industrial

  • Purpose: Industrial where public services limited; scale limited by adjacency/environment. § 26-12-020(B)(4).
  • Uses: See Table 12-1; some incidental retail/services allowed in M3. § 26-12-030(D).
  • Key dimensional standards: See Table 12-2 (e.g., min lot 1.5 acres w/o public services). § 26-12-040.

Additional industrial notes: amplified live music can be allowed with a use permit in all industrial zones. § 26-12-030(C).

Special Purpose Districts

• PC — Planned Community

  • Purpose/structure: Uses depend on underlying General Plan category; tables identify PCRR (rural residential), PCUR (urban residential), PCCOM (commercial). § 26-14-030(A).
  • Uses: See Table 14-1.

• PF — Public Facilities

  • Uses: Select industrial-type uses (e.g., labs, light manufacturing) may be permitted; see Table 14-1. § 26-14-030.

Combining (Overlay) Districts that affect land use

• B6/B7/B8 — “B” Combining Districts
  • Function: Set maximum residential density and/or freeze minimum lot size; can limit subdivision and thereby practical land-use intensity. § 26-78-005–010.
• X — Vacation Rental Exclusion/Cap
  • Function: Either exclude new vacation rentals or cap them at 5% or 10% of single-family dwellings in the overlay area; all other base-zone uses remain as allowed. § 26-79-020.
• TS — Traffic Sensitive
  • Function: All base-zone permitted/conditional uses remain, but total intensity is limited by trip caps (e.g., 63 trips/acre peak hour for some Limited Commercial parcels; 18 trips/acre where “traffic sensitive”). § 26-80-010–020.
• Open-space/public-safety overlays declared in the ordinance include F1 Floodway, F2 Floodplain, SR Scenic Resource, SD Scenic Design, BR Biotic Resource, G Geologic Hazard, and HD Historic. See Article list in § 26-02-020(b); detailed numeric standards for these combining districts are in their respective articles.

Use-specific regulations you will see referenced in the tables

• Many agricultural and residential entries point to Article 18 “Use Regulations” for standards (e.g., small-scale ag processing, agricultural support services, animal keeping). See examples in § 26-18-040 and § 26-18-050.
• Accessory Dwelling Units are governed by county ADU regulations referenced from the residential articles; see the County’s ADU section in Article 88 and learn how state rules interact on our California ADU law page. See cross-reference in § 26-24-080/26-24-090 notes to § 26-88-060.

How to navigate nonconformities, exceptions, and other reviews

• If your existing use/building doesn’t match current zoning, see Sonoma County Nonconforming Uses.
• If strict application of a standard causes practical difficulty, see Sonoma County Variances and Exceptions.
• Signs are regulated separately; see Sonoma County Signage.
• Historic resources may be subject to the HD combining district and local review; see Sonoma County Historic Preservation.
• Some commercial and almost all industrial development triggers Sonoma County Design Review. See also the Article 82 reference in §§ 26-08-030(B), 26-10-030(B), and 26-12-030(B).

Checklist

• Confirm your parcel is in the unincorporated area and identify your base district(s) and any combining (overlay) districts. Start with § 26-01-010 and the County zoning map.
• Read the correct allowed-use table for your zone: residential (§ 26-08-030), commercial (§ 26-10-030), industrial (§ 26-12-030), agricultural/resource (§ 26-06-030), or special purpose (§ 26-14-030).
• Check the “Use Regulations” cross-references for your use (e.g., ag support services in § 26-18-050).
• Verify any overlay constraints (B6/B7/B8 density/lot-size freezes; X vacation rental limits; TS trip caps; scenic/biotic/floodplain/historic overlays). § 26-78-010, § 26-79-020, § 26-80-010–020, § 26-02-020(b).
• Confirm development standards (setbacks, height, lot size, coverage) in your zone’s tables in the Sonoma County Development Standards; for industrial see § 26-12-040 Table 12-2.
• Determine if design review applies; it does for most commercial and industrial projects and some residential projects. § 26-08-030(B), § 26-10-030(B), § 26-12-030(B).
• Check parking requirements for your use.
• If your use is not listed, discuss “equivalent use” findings (ag/resource: § 26-06-030(C); industrial: § 26-12-030(F)) with staff.
• If needed, plan for a use permit and/or variances; see Sonoma County Variances and Exceptions.

Risks & Ambiguities

Plain-English Summary

In unincorporated Sonoma County, what you can do on your land is set by your zoning district’s allowed-use table. Find your district, read the table to see if your use is “P” (by right) or “C” (use permit), check any overlays that could cap or exclude uses, and confirm basic site standards and design review triggers. If a use isn’t listed, it’s generally not allowed unless staff can deem it equivalent under the code.

Source References

• § 26-01-010 (Applicability of zoning districts to General Plan land use categories).
• § 26-02-020(b) (Articles establishing open-space/public-safety combining districts).
• § 26-06-030 (Allowed land uses in Agricultural/Resource zones; unlisted-use equivalency).
• § 26-08-020 (Purpose of residential zones).
• § 26-08-030 (Allowed land uses in Residential zones; design review triggers).
• § 26-10-030 (Allowed land uses in Commercial zones; design review).
• § 26-12-020 (Purpose of industrial zones).
• § 26-12-030 (Allowed land uses in Industrial zones; amplified music; equivalency).
• § 26-12-040 (Industrial development standards, Table 12-2).
• § 26-14-030 (Allowed land uses in Special Purpose zones; PC/PF tables).
• § 26-18-040, § 26-18-050 (Use Regulations: small-scale ag processing; ag support services).
• § 26-78-005–010 (B6/B7/B8 combining districts).
• § 26-79-020 (X Vacation Rental Exclusion/Cap).
• § 26-80-010–020 (TS Traffic Sensitive Combining District).

Also see:

• Sonoma County Zoning
• Sonoma County Development Standards
• Sonoma County Parking
• Sonoma County Design Review
• Sonoma County Overlay Districts
• Sonoma County Nonconforming Uses
• Sonoma County Variances and Exceptions
• California Building Standards Code

Retrieved passages

• Sonoma County Zoning Code (§ II) High relevance show source text
• Sonoma County Zoning Code (§ III) High relevance show source text
• Sonoma County Zoning Code (Article 82) High relevance show source text
• Sonoma County Zoning Code (§ III) High relevance show source text
• Sonoma County Zoning Code (§ III) High relevance show source text
• Sonoma County Zoning Code (article identifies) High relevance show source text
• Sonoma County Zoning Code (Article 82) High relevance show source text
• Sonoma County Zoning Code (§ III) High relevance show source text

Cited sections

• § 26-01-010 (Applicability of zoning districts to General Plan land use categories). (§ 26-01-010)
• § 26-02-020(b) (Articles establishing open-space/public-safety combining districts). (§ 26-02-020)
• § 26-06-030 (Allowed land uses in Agricultural/Resource zones; unlisted-use equivalency). (§ 26-06-030)
• § 26-08-020 (Purpose of residential zones). (§ 26-08-020)
• § 26-08-030 (Allowed land uses in Residential zones; design review triggers). (§ 26-08-030)
• § 26-10-030 (Allowed land uses in Commercial zones; design review). (§ 26-10-030)
• § 26-12-020 (Purpose of industrial zones). (§ 26-12-020)
• § 26-12-030 (Allowed land uses in Industrial zones; amplified music; equivalency). (§ 26-12-030)
• § 26-12-040 (Industrial development standards, Table 12-2). (§ 26-12-040)
• § 26-14-030 (Allowed land uses in Special Purpose zones; PC/PF tables). (§ 26-14-030)
• § 26-18-040, § 26-18-050 (Use Regulations: small-scale ag processing; ag support services). (§ 26-18-040)
• § 26-78-005–010 (B6/B7/B8 combining districts). (§ 26-78-005)
• § 26-79-020 (X Vacation Rental Exclusion/Cap). (§ 26-79-020)
• § 26-80-010–020 (TS Traffic Sensitive Combining District). (§ 26-80-010)
• Sonoma County Zoning
• Sonoma County Development Standards
• Sonoma County Parking
• Sonoma County Design Review
• Sonoma County Overlay Districts
• Sonoma County Nonconforming Uses
• Sonoma County Variances and Exceptions
• California Building Standards Code
• SonomaCounty_ZoningCode.md

• Official Sonoma County code library