Yolo County Zoning, Planning & Building Codes

Last reviewed: July 6, 2026

Overview

Yolo County’s zoning and land-use rules apply only in the unincorporated areas outside the incorporated cities. The governing document is Title 8 of the Yolo County Code; its “Zoning Regulations” are in Chapter 2 and are implemented alongside the County’s General Plan.
The code sets out base zoning districts, overlay tools, and procedures for ministerial and discretionary approvals tied to building, subdivision, and design review.

The unincorporated areas are governed by Title 8, Chapter 2 (“Zoning Regulations”), which applies to “all lands” in unincorporated Yolo County and implements the County’s General Plan.

How Yolo County’s code is organized

• Title 8 contains two key parts for development: the Chapter 2 “Zoning Regulations” and companion “Land Development Regulations” in other chapters of Title 8. The zoning plan implements the General Plan and any adopted specific or area plans.
• Scope: The zoning code applies to all lands in the unincorporated areas.
• Articles by topic:
  • Articles for base districts (agricultural, residential, commercial, industrial, public/open space) include allowed uses and tables of development standards (e.g., setbacks, height, FAR).
  • Article 9 covers the Specific Plan (S‑P) base zone and overlay zones (e.g., airport, natural heritage, Delta Protection, mineral resource, planned development, Special Building overlay).
  • Article 13 sets parking requirements, including DMX-specific rules and the countywide parking table.
  • Chapter 1 (Title 8) governs subdivision mapping, advisory agency roles, application completeness, and when a building permit may be issued after map-related improvements.
• Permitting “ladder”: pre-application (optional/when required), zoning clearance (ministerial), site plan review (ministerial, deeper check), and discretionary permits (Minor/Major Use Permit, Variance), plus subdivision approvals where applicable.

See Yolo County Zoning and Yolo County Development Standards to jump directly to districts and standards.

Zoning district families

Yolo County groups its zones into agricultural, residential (including rural residential), commercial, industrial, public/open space, a Specific Plan base zone, and multiple overlays. The code uses “Use Types” plus district tables to show what is allowed by right (with zoning clearance), by site plan review, or by Minor/Major Use Permit.

• Agricultural base zones: A‑N, A‑X, A‑C, A‑I, A‑R. Standards include farm-residence siting, buffers from agriculture, setbacks, and special rules for animal facilities and agricultural processing.
• Rural residential and residential zones: RR‑5, RR‑2, R‑L, R‑M, R‑H. Multifamily by right (with site plan review) scales up from R‑L to R‑H, with increasing height and density ranges; accessory and junior accessory dwellings (ADUs/JADUs) are regulated in residential “specific use” standards.
• Commercial zones: C‑L, C‑G, DMX (Downtown Mixed Use), C‑H (highway). Each has tailored bulk standards and FAR caps; DMX adds form and frontage rules.
• Industrial zones: I‑L, I‑H, OPRD (Office Park/Research & Development). Standards include height, FAR, and impervious coverage.
• Public/open space zones: P‑R, POS, PQP. Include tailored setbacks by adjacency and FAR limits.
• Specific Plan base zone: S‑P identifies future growth areas that cannot develop until a specific plan is adopted (e.g., Covell/Pole Line Rd., 384 acres).
• Overlay districts: NH‑O (Natural Heritage), AD‑O (Agricultural District—Clarksburg area), DP‑O (Delta Protection), SG‑O/SGR‑O (Sand & Gravel), TT‑O (Tribal Trust), A‑O (Airport), PD (Planned Development overlay with project-specific standards), and B (Special Building—2‑acre min. lot size where on private well/septic).

For a quick directory of these tools, see Yolo County Overlay Districts.

Citywide development standards

Below are high-level, commonly referenced standards. Always verify the exact table for your district and whether an overlay modifies it.

• Residential districts (selected baseline standards)
  • R‑L: minimum lot area 1,200 sf (2.0 acres if no services), front 10 ft (garage 20 ft), rear 20 ft, side 5 ft, max height 35 ft/two stories (up to 40 ft/three stories with Use Permit), density 1.0–9.9 du/ac, “no size limit” but require 600 sf open space per unit.
  • R‑M: similar front/side, rear 15 ft, heights up to 40 ft (or 50 ft with Use Permit), density 10.0–19.9 du/ac, 300 sf open space/unit.
  • R‑H: front 10 ft, side 10 ft (less with Use Permit), heights 50 ft/four stories (or 60 ft/five stories with Use Permit), density 20+ du/ac, 200 sf open space/unit.
  • Residential accessory structures must generally separate from principal buildings by 10 ft (or building/fire code minimums) and follow tailored rules; ADUs/JADUs are addressed in residential “specific use” standards.
• Agricultural siting and buffers
  • New farm homes: typical minimums are front 20 ft (or 50 ft from road centerline, whichever greater; 30 ft on arterials), rear 25 ft, side 20 ft, with increased 100 ft+ where needed to protect adjacent agricultural spraying; homes must be 100 ft from streams.
  • Agricultural districts often require 100–300 ft buffers from adjoining agriculture for certain yards; verify the applicable table and notes.
• Commercial form and intensity
  • C‑L: FAR up to 0.5 (or 1.0 for mixed commercial/residential), height 35 ft.
  • C‑G: FAR up to 1.0 (or 2.0 for mixed commercial/residential), max 50 ft/four stories.
  • DMX: façade at or within 10 ft of front line; min height 22 ft on key frontages; max 50 ft/four stories.
  • C‑H: FAR 1.0, height 40 ft.
• Industrial intensity
  • I‑L: FAR 0.5, max 45 ft/four stories, up to 90% impervious lot coverage.
  • OPRD: FAR 1.0, max 65 ft/five stories, 75% impervious lot coverage.
• Public/open space intensity
  • PQP: front 5 ft or match prevailing, sides/rear increase if abutting residential; max 50 ft/four stories; FAR 0.5.
• Flood and levee adjacency
  • Structures must stay 50 ft from the toe of any flood-control levee; additional restrictions may apply within 500 ft. Riparian setbacks of 100 ft from streams apply to new homes.
• Parking
  • Countywide: Provide a parking plan using Table 8‑2.1306 as a guide; standards function as maximums unless the Director requires more; accessible and bicycle spaces must be included.
  • DMX: no off-street parking for most small nonresidential uses; on-site parking (when provided) must be behind buildings or screened.

Specific plans & overlays

• Specific Plan base zone (S‑P): Identifies future urban growth areas and holds development until the County adopts a specific plan; interim agricultural uses may continue but capital-intensive ag is discouraged absent findings. Example: Covell/Pole Line Rd. (384 acres).
• Overlay districts:
  • A‑O (Airport) limits uses and structure heights within airport safety zones; uses must align with CLUPs and FAA limits.
  • DP‑O (Delta Protection) aligns uses with the Delta Protection Commission’s Land Use and Resource Management Plan.
  • SG‑O / SGR‑O (Sand & Gravel) implement mineral resource safeguards and, where applicable, the Cache Creek program (see Title 10 cross-references).
  • NH‑O (Natural Heritage) aligns with the Yolo HCP/NCCP.
  • AD‑O (Agricultural District – Clarksburg) applies district-specific ag rules (see § 8‑2.401 referenced in the code).
  • PD (Planned Development overlay) requires a rezoning and a custom ordinance with tailored site/development standards; several PDs remain active (e.g., PD‑45 Wild Wings).
  • B (Special Building overlay) imposes a 2‑acre minimum lot size for newly created rural parcels on private well/septic (Capay Valley, Dunnigan Hardwoods, Patwin Rd. examples noted).

Building permits & review

• Ministerial steps:
  • Zoning Clearance: over-the-counter confirmation that your building permit plans meet height, setback, parking, and other district standards. If not, revise or seek a Variance/discretionary relief.
  • Site Plan Review: used when a by-right use still needs a deeper check against specific zoning standards or more complex site/building proposals.
• Discretionary steps:
  • Minor/Major Use Permits: required for conditional uses listed in district permit tables; hearings and findings apply.
  • Variances: relief from strict standards based on site-specific hardship, processed by the Zoning Administrator or Planning Commission.
• Subdivision & mapping: Chapter 1 (Title 8) governs tentative/parcel/final maps, advisory agency roles, and application completeness timelines; building permits may issue after required dedications and improvements satisfy the County Engineer.
• Building code: Permits are also subject to the California Building Standards Code in addition to zoning.

State housing law in Yolo County

• ADUs and JADUs: Yolo County implements ADUs/JADUs in the residential “specific use” standards (see ADUs in § 8‑2.506(b)); state law requires local rules to allow at least an 800 sf ADU with 4‑ft side/rear setbacks and limits certain local size and parking controls. Detached ADU baseline height is 16 ft with state-defined increases in transit or multifamily contexts.
• SB 9 (urban lot splits/duplex in urbanized areas): Not found in retrieved materials; verify County implementation and eligibility in the unincorporated areas.
• Density Bonus: Not found in retrieved materials; verify local procedures for state Density Bonus Law projects.
• Rent rules: A local rent control program was not found in retrieved materials; verify. Statewide tenant protections may apply separately; see California housing laws.

Source References

• Title 8, Chapter 2 — Zoning Regulations: title/scope/purpose (e.g., §§ 8‑2.101 to 8‑2.105; § 8‑2.103 scope to unincorporated areas).
• Ministerial/discretionary processes: §§ 8‑2.213 (pre‑application), 8‑2.214 (zoning clearance), 8‑2.215 (site plan review), 8‑2.218 (variances), 8‑2.219 (maps).
• Residential standards (R‑L/R‑M/R‑H) and accessory structures: Table refs and § 8‑2.506.
• Agricultural siting/buffers and riparian/levee setbacks: §§ 8‑2.402(d) and related notes; levee/stream setbacks.
• Commercial/DMX standards: §§ 8‑2.605, 8‑2.606(a) and DMX rules.
• Industrial standards: § 8‑2.705.
• Public/open space standards: § 8‑2.805.
• Parking (countywide & DMX): §§ 8‑2.1305–1306.
• Specific Plan & Overlays: §§ 8‑2.901–906; PD and B overlay details; overlay purpose statements.
• Subdivision and building-permit issuance after improvements: Title 8, Ch. 1 (e.g., § 8‑1.309; public improvements and permit issuance).