Colusa County — Landscaping and Screening

Last reviewed: July 6, 2026

Overview

This page explains what the Colusa County zoning/planning ordinance says about landscaping and screening in unincorporated areas. It focuses on how plantings, fences/walls, and buffers are used to screen outdoor activity areas, protect neighborhood character, and mitigate visual impacts. If you are working outside the cities, confirm you are in unincorporated Colusa County before applying any standard from a city code.

The single most important step: verify you are in unincorporated Colusa County. The City of Colusa’s zoning does not govern unincorporated areas; its own ordinance expressly applies only “within the incorporated area of the City of Colusa” (§ 1.06) .

What the ordinance says about landscaping and screening

• Not found in retrieved materials for unincorporated Colusa County. The available file records are the City of Colusa’s zoning appendix and show city application and districts, not countywide rules for unincorporated areas (e.g., the document states the plan applies within the incorporated area of the City of Colusa, and lists city districts such as R‑1, C‑N, M‑1, etc., in § 2.01) .
• Because the county ordinance text was not present in the retrieved materials, all landscaping/screening specifics below must be verified with the County.

For overall context and where county rules would normally connect:

• See the county’s zoning & planning overview and baseline Colusa County Zoning pages for jurisdiction and map coverage.
• Landscaping often ties into Colusa County Development Standards, Colusa County Parking for parking-lot planting/screening, Colusa County Design Review for site and frontage treatments, Colusa County Overlay Districts where scenic or environmental overlays add planting/buffering, and Colusa County Signage where landscaped bases or screens may be specified. If a fence or wall is also a structural retaining wall, construction is addressed under the California Building Standards Code even though the siting/screening function is a zoning matter.

Countywide applicability vs. city code

• The retrieved ordinance text is the City of Colusa’s “Appendix A – Zoning,” which on its face applies only to the incorporated city (§ 1.06) and includes city-only district labels (§ 2.01). It does not control development in unincorporated Colusa County .
• Some screening and fence provisions appear within the city’s general provisions, but they cannot be used as county standards; they are included here only to show the type of topics that county standards commonly address (the city document’s general-provision articles include height exceptions at § 32.08, again confirming we are reading a city chapter) .

District-by-district applicability in unincorporated Colusa County

Not found in retrieved materials. The available files list City of Colusa districts rather than county districts (§ 2.01 shows R‑1, C‑N, M‑1, etc., as city districts) . Verify with the jurisdiction.

Typical subject areas you should expect to see (verify in the County code)

• Street-front landscaping for commercial/industrial frontages and around surface parking lots — Not found in retrieved materials.
• Perimeter buffers where commercial/industrial uses abut residential or rural residential — Not found in retrieved materials.
• Screening of outdoor storage, equipment, loading, and refuse areas with solid walls/fences and/or dense planting — Not found in retrieved materials.
• Height/material limits for fencing and walls near property lines and street corners (clear-vision triangles) — Not found in retrieved materials.
• Landscape maintenance, irrigation, and plant palette/water-efficiency standards — Not found in retrieved materials.
• Special or overlay-driven frontage landscaping and scenic corridor planting — Not found in retrieved materials.

Quick-reference table (subject to verification)

How it typically interfaces with other approvals

• Site plans with landscaping/screening often appear in design review submittals in counties. Verify whether your project triggers that process.
• Off-street parking standards commonly require interior shading trees and perimeter screens; confirm county specifics.
• If your site sits within any overlay districts (e.g., scenic, floodplain, habitat), additional planting or view-shed protections may apply; verify applicability on your parcel.
• Nonconforming sites upgrading uses or reworking lots may be subject to upgrades under Nonconforming Uses; check whether landscaping retrofits are required during remodels.
• If an objective standard causes practical difficulty (e.g., a required masonry wall where drainage or safety prevents construction), relief may require a variance. Verify criteria and findings with County staff.

Checklist

• Confirm your site is in unincorporated Colusa County (not within a city limit).
• Obtain the current Colusa County landscaping and screening standards that apply to your zoning district. Not found in retrieved materials; verify with the jurisdiction.
• Identify whether any overlays affect frontage, buffers, or plant palettes. Not found in retrieved materials; verify with the jurisdiction.
• Show all required screens: outdoor storage, loading/refuse areas, roof/ground equipment. Not found in retrieved materials; verify with the jurisdiction.
• Coordinate with parking layout for perimeter and interior landscaping if applicable.
• Provide planting, irrigation, and maintenance notes to meet county standards if specified.
• Confirm fence/wall heights/materials and any corner-safety visibility triangles.
• If standards cannot be met due to site constraints, discuss potential exceptions or variances with staff.

Risks & Ambiguities

Plain-English Summary

For projects in unincorporated Colusa County, you will likely need to landscape public-facing edges and screen outdoor storage, trash, loading, and mechanical equipment with plantings and/or walls. Because the county ordinance text wasn’t included in the retrieved materials, get the county’s current standards for your zoning district before you design; do not rely on the City of Colusa code, which by its own terms applies only inside the city (§ 1.06) .

Source References

• City of Colusa Zoning Appendix A (included in retrieved materials for reference to jurisdictional scope only): § 1.06 Application (applies within incorporated City of Colusa) ; § 2.01 Districts (lists city districts, confirming city code) ; Article 32 reference point: § 32.08 Height exceptions (city chapter context only) .
• Not found in retrieved materials: Colusa County landscaping/screening standards applicable to unincorporated areas. Verify with the jurisdiction.

Retrieved passages

• Colusa County Zoning Code High relevance show source text
• CWUIC § 65850.6 (Title 24) High relevance show source text
• Colusa County Zoning Code (§ 26) Medium relevance show source text
• Colusa County Zoning Code Medium relevance show source text
• Colusa County Zoning Code Medium relevance show source text
• CWUIC § 1.11 (Chapter 1) Medium relevance show source text
• CGBSC § 405.5.3 (CHAPTER 5) Medium relevance show source text
• Colusa County Zoning Code Medium relevance show source text
• Colusa County Zoning Code (section 39.02) Medium relevance show source text
• Colusa County Zoning Code (§ 1) Medium relevance show source text
• Colusa County Zoning Code (§ 1) Medium relevance show source text
• Colusa County Zoning Code (§ 18-2.) Medium relevance show source text
• CBC § 120 Medium relevance show source text
• Colusa County Zoning Code (Article 34.) Medium relevance show source text
• Colusa County Zoning Code (section may) Medium relevance show source text

Cited sections

• City of Colusa Zoning Appendix A (included in retrieved materials for reference to jurisdictional scope only): § 1.06 Application (applies within incorporated City of Colusa) ; § 2.01 Districts (lists city districts, confirming city code) ; Article 32 reference point: § 32.08 Height exceptions (city chapter context only) . (§ 1.06)
• Not found in retrieved materials: Colusa County landscaping/screening standards applicable to unincorporated areas. Verify with the jurisdiction.
• 2025 California Residential Code.md
• ColusaCounty_ZoningCode.md

• Official Colusa County code library