Local zoning · Mendocino County

Mendocino County — Landscaping and Screening

Landscaping and Screening under the Mendocino County local zoning and planning code, with the controlling citations.

Last reviewed: July 6, 2026

Overview

In unincorporated Mendocino County, landscaping and screening are governed by the County’s zoning ordinance (Title 20) and a few area-specific overlays. Countywide rules set heights and placement for fences, walls, hedges, and temporary construction/security fencing, while special districts and overlays add visual-resource protections, buffering, and planting expectations. If your site is in the Coastal Zone, in the Brush Street Triangle, or in the MUNS Mixed Use North State area, additional landscaping and screening standards apply on top of the base rules.

Core rule: In unincorporated areas, view‑obscuring fences/hedges are limited to 3.5 ft in required front yards and 8 ft elsewhere; non‑view‑obscuring animal fences are largely unrestricted (§ 20.152.020) .

Countywide standards — Fences, walls, screening, and related items

View‑obscuring fences and hedges: max 3.5 ft in the required front yard; max 8 ft in other locations; fences over 7 ft require a building permit (§ 20.152.020(A)(1)) .
Non‑view‑obscuring “animal” fencing (e.g., barbed/chicken/hog wire, cyclone) allowing ~90% light through: not subject to height/location restrictions (§ 20.152.020(A)(2)) .
Intersection/driveway “clear visibility area”: coordinate with County DOT for exact triangle dimensions when placing fences/walls/landscaping near corners (§ 20.152.020(A)(1), Table 20.152‑A) .
Retaining walls: if the retained embankment exceeds 6 ft, step/bench so no single wall exceeds 48 in and bench depth at least equals wall height (§ 20.152.020(B)) .
Temporary construction fencing: may be required to protect trees/sensitive features; remove within 90 days after construction completes (§ 20.152.020(C)) .
Temporary security fencing on vacant property: allowed with Director approval; height at Director’s discretion but never over 8 ft; remove when an entitlement is issued (§ 20.152.020(D)) .
Razor/concertina wire: prohibited unless an administrative permit justifies specific security needs or other law requires it (§ 20.152.020(E)) .

These are development standards under Title 20; they sit alongside other Mendocino County Development Standards and base zoning rules you’ll find in Mendocino County Zoning.

District-by-district: where landscaping/screening rules differ

Countywide (All base zoning districts)

Purpose: Set a uniform baseline for fences, walls, screening, and related site features.
Typical uses affected: All residential, commercial, industrial, and agricultural properties in unincorporated areas.
Key dimensional standards: 3.5 ft front‑yard and 8 ft elsewhere for view‑obscuring fences; building permit threshold at >7 ft; stepped retaining walls for >6 ft embankments; animal fencing broadly exempt (§ 20.152.020) .
Where it applies: All unincorporated Mendocino County outside incorporated cities.

Coastal Zone visual-resource overlays (Highly Scenic Areas, Special Treatment Areas, and the Highway 1 Scenic Corridor)

Purpose: Protect public coastal views and visual character; use landscaping judiciously so screening never blocks significant public vistas (§ 20.504.015–.025) .
Typical uses affected: All development in mapped Coastal Zone overlays, including residential and visitor‑serving uses.
Key standards:
- Encourage tree planting to screen buildings, but do not let new trees interfere with coastal/ocean views from public areas (§ 20.504.015(10)) .
- In “highly scenic areas,” site new development below ridgelines, near toe‑of‑slope, and by existing vegetation to reduce visual impact; avoid removing tree masses that define ridgelines (§ 20.504.015(5), (8)) .
- “Special Treatment Areas” and a designated Highway 1 Scenic Corridor (generally 200–350 ft from the road shoulder) carry added visual protections (§ 20.504.025) .
Where it applies: Mapped Coastal Zone areas of unincorporated Mendocino County (check Mendocino County Overlay Districts). Some locations, like the Town of Mendocino area, also have corridor‑specific constraints (see below).

Town of Mendocino area — Scenic Corridor and historic setting within the Coastal Zone (unincorporated)

Purpose: Protect landmark views and the historic setting under the County‑adopted Mendocino Town Plan.
Typical uses affected: Projects fronting or visible from Highway 1 and resources in the historic setting.
Key standards:
- The scenic corridor along Highway 1 is generally 200–350 ft wide. Projects in that band must maximize protection of existing public views (§ 20.692.020(A)–(B)) .
- For the Mendocino Presbyterian Church parcel, any landscaping used for screening must not obscure the sanctuary’s visibility from Highway 1 (§ 20.692.020(C)) .
Where it applies: Unincorporated Town of Mendocino area. Projects may also be subject to Mendocino County Historic Preservation review depending on scope.

Brush Street Triangle (site development permit area)

Purpose: Manage site design quality in an inland plan area commonly associated with larger commercial/industrial development.
Typical uses affected: Commercial and industrial projects requiring a site development permit.
Key standards:
- Decision findings must show “sufficient landscaped areas” to separate or screen structures from streets and adjoining sites and to break up/screen large expanses of paving (§ 20.240.030(D)) .
- Landscaping and other required improvements can be conditioned to be complete before occupancy (§ 20.240.035(B)) .
Where it applies: The Brush Street Triangle plan area (unincorporated). Landscaping plans are a required submittal for permits here (§ 20.240.020(B)(4)) . Coordination with Mendocino County Parking standards is common due to the paved‑area screening requirement.

MUNS — Mixed Use North State District

Purpose: Enable mixed residential/commercial neighborhoods with compatible design and landscaping.
Typical permitted mix: Residential over/alongside commercial and civic uses; separation/buffering where needed.
Key dimensional standards: Max building height 50 ft (§ 20.087.045) and non‑residential FAR 0.3 min / 1.0 max (§ 20.087.050) .
Landscaping and screening essentials:
- Projects must integrate landscaping as an “integral part” of site design; protect mature trees; provide efficient irrigation; and maintain approved landscaping (§ 20.085.055; applied via Ch. 20.086) .
- Provide shade for parking spaces “to the extent practical” (§ 20.085.055; applied via Ch. 20.086) — often coordinated during Mendocino County Design Review .
- Where residential and non‑residential uses require separation, landscaped areas must be installed in the separation zone to limit noise, light, and privacy conflicts; trash enclosures are prohibited in that zone (§ 20.087.055(2)(b)) .
- If abutting “Agricultural Land,” provide a 50‑ft setback plus a ≥6‑ft fence or wall at the side/rear property line; no barbed or concertina wire (§ 20.087.055(2)(c)–(d)) .
Where it applies: The MUNS area identified in Chapter 20.086 (unincorporated inland corridor).

Coastal dunes and special features (Coastal Zone)

Purpose: Protect sensitive dune systems while allowing limited stabilization measures.
Typical activities affected: Dune stabilization tied to existing development protection.
Key standards: Planting vegetation for dune stabilization and construction of fences/walls to impede sand movement can be permitted subject to Coastal provisions (§ 20.719.040(A)(3)) .
Where it applies: Mapped dune habitats in the unincorporated Coastal Zone.

Quick-reference standards table

Topic	Core standard	Applies to	Code Reference
Front-yard fence/hedge height	Max 3.5 ft for view‑obscuring	All unincorporated areas	§ 20.152.020(A)(1)
Other yard fence/hedge height	Max 8 ft (view‑obscuring); building permit if >7 ft	All unincorporated areas	§ 20.152.020(A)(1) and n.1
Animal/non‑view‑obscuring fences	Largely exempt from height/location limits	All unincorporated areas	§ 20.152.020(A)(2)
Clear-visibility corners	Coordinate fence/wall/landscape placement with DOT	Intersections/driveways	§ 20.152.020(A)(1), Table 20.152‑A
Retaining walls	Bench/step if embankment >6 ft; each wall ≤ 48 in high	All unincorporated areas	§ 20.152.020(B)
Temporary construction fencing	May be required; remove within 90 days after completion	Projects under permit	§ 20.152.020(C)
Temporary security fencing	Director approval; never > 8 ft; remove at entitlement	Vacant properties	§ 20.152.020(D)
Razor/Concertina wire	Prohibited without administrative permit/mandate	All unincorporated areas	§ 20.152.020(E)
Parking-lot shading	Provide shade to extent practical	MUNS/mixed-use projects	§ 20.085.055; Ch. 20.086
Landscaped separation/buffers	Required between residential vs. non‑residential	MUNS projects	§ 20.087.055(2)(b)
Ag adjacency fencing	≥6‑ft fence/wall + 50‑ft setback if abutting Agricultural Land	MUNS projects	§ 20.087.055(2)(c)–(d)
Coastal tree/screening limits	Screen buildings but protect public ocean views	Coastal overlays	§ 20.504.015(10)
Hwy 1 Scenic Corridor	Maintain public views; do not screen landmark church	Town of Mendocino area	§ 20.692.020(A)–(C)
Brush Street Triangle	Landscape to screen streets/adjoining sites and large paving	BST plan area	§ 20.240.030(D); § 20.240.035(B)

Note: Some special‑area approvals may be processed through Mendocino County Design Review. Where an exception from a measurable standard is sought, see Mendocino County Variances and Exceptions.

Checklist

Confirm if your parcel is in a Coastal overlay, the Town of Mendocino area, the Brush Street Triangle, or the MUNS district; overlay rules can limit screening that blocks public views (§ 20.504.015–.025; § 20.692.020) .
Front‑yard fences/hedges kept at or below 3.5 ft if view‑obscuring; elsewhere max 8 ft; if over 7 ft, plan for a building permit (§ 20.152.020(A)(1) n.1) .
Verify corner/driveway sight‑triangle dimensions with County DOT before installing screening near intersections (§ 20.152.020(A)(1)) .
Use stepped/benched retaining walls where the retained embankment exceeds 6 ft; design benches at least equal to wall height (§ 20.152.020(B)) .
In MUNS, integrate landscaping, protect mature trees, provide efficient irrigation, and shade parking to the extent practical (§ 20.085.055; Ch. 20.086) .
Where residential and non‑residential uses are separated in MUNS, landscape the separation area; if abutting Agricultural Land, add a ≥6‑ft wall/fence and 50‑ft setback; no barbed/concertina wire (§ 20.087.055(2)(b)–(d)) .
If your project is in the Brush Street Triangle, prepare a landscape plan that screens streets/adjoining sites and breaks up large paved areas; expect completion before occupancy (§ 20.240.030(D); § 20.240.035(B)) .
Remove temporary construction fencing within 90 days after completion (§ 20.152.020(C)) .
Avoid razor/contadina wire unless an administrative permit authorizes it for security (§ 20.152.020(E)) .

Risks & Ambiguities

Issue	Why it matters	What to verify
Measuring fence height	Compliance hinges on how height is measured over grade	Confirm method referenced in § 20.152.010(B)(2) as cited in § 20.152.020(A)(1) .
Corner visibility triangles	Sight safety varies by road classification and driveway geometry	Get dimensions from County DOT per § 20.152.020(A)(1) Table 20.152‑A .
Screening vs. coastal views	Planting to screen buildings can’t block public ocean views	Map whether your site is in a Highly Scenic Area/Scenic Corridor and review § 20.504.015(10), § 20.504.025, § 20.692.020(C) .
Mixed‑use separation details	The width/form of landscaped separation areas can be project‑specific	Review separation triggers and landscape/no‑trash rules in § 20.087.055(2)(b)–(d) and discuss during Design Review .
Temporary security fencing	Height and necessity are discretionary	Coordinate early with Planning Director per § 20.152.020(D) .
Dune stabilization planting	Sensitive resource constraints apply	Confirm Coastal permitting and allowed measures under § 20.719.040(A)(3) .

Plain-English Summary

If you’re in unincorporated Mendocino County, keep front‑yard privacy fences or hedges under 3.5 ft; elsewhere you can go to 8 ft, but anything over 7 ft likely needs a building permit. On corners, keep sightlines clear. Projects in the Coastal Zone can use landscaping to soften views of buildings, but you can’t plant in ways that block public ocean views. In special areas like the Brush Street Triangle and MUNS, expect stronger requirements to landscape parking and create planted buffers—sometimes including a 6‑ft wall/fence where homes abut agriculture.

Source References

§ 20.152.020 Fences, Walls, and Screening — heights, animal fencing, retaining walls, temporary fencing, razor wire
§ 20.240.020–.035 Brush Street Triangle — application contents (landscape plan), findings (landscaped areas for screening), conditions (landscaping before occupancy)
§ 20.504.015–.030 Coastal Visual/Lighting/Satellite Dish — scenic protections, tree planting for screening without blocking views, landscaping around dishes
§ 20.504.025 Special Treatment Areas; Highway 1 Scenic Corridor bandwidth/intent
§ 20.692.020 Town of Mendocino Scenic Corridor — protect public views; church sanctuary visibility and screening limits
§ 20.086 (MUNS) and related Mixed Use standards (§ 20.085.055; § 20.087.045; § 20.087.050; § 20.087.055) — landscaping integration, parking shade, height/FAR, landscaped separations, Ag adjacency fencing, no barbed wire
§ 20.719.040 Coastal Dunes — fencing/planting for stabilization under Coastal procedures

Also see:

Sources

Retrieved passages

Mendocino County Zoning Code (Title 20) High relevance
Mendocino County Zoning Code (Section 20.240.030) High relevance
CWUIC § 65850.6 (Title 24) High relevance
Mendocino County Zoning Code (§ 2) High relevance
Mendocino County Zoning Code (§ 39) Medium relevance
Mendocino County Zoning Code (Title 20) Medium relevance
Mendocino County Zoning Code (Section 20.085.055) Medium relevance
Mendocino County Zoning Code (Chapter 20.716) Medium relevance

Cited sections

Official Mendocino County code library

Frequently asked questions

What counts as a “view-obscuring” fence in unincorporated Mendocino County?

Board or picket fences and dense hedges that block sight through them are treated as view‑obscuring. They’re limited to 3.5 ft in required front yards and 8 ft elsewhere; non‑view‑obscuring animal fencing is largely exempt (§ 20.152.020(A)) .

Do I need a permit for an 8‑foot backyard fence?

Yes, zoning allows up to 8 ft for view‑obscuring fencing outside the required front yard, but once a fence exceeds 7 ft it requires a building permit. Coordinate early to avoid delays (§ 20.152.020(A)(1) n.1) .

Can I plant trees to hide my house along the coast?

Maybe—with limits. Coastal policies encourage using landscaping to soften visual impacts, but new planting cannot interfere with public ocean/coastal views. Check if your lot is in a Highly Scenic Area or scenic corridor before planting (§ 20.504.015(10); § 20.504.025) .

What landscaping is required for commercial projects in the Brush Street Triangle?

Your project must reserve enough landscaped area to separate/screen buildings from streets and adjoining sites and to break up/screen large expanses of paving. Landscaping can be conditioned for completion before occupancy (§ 20.240.030(D); § 20.240.035(B)) .

I’m building in the MUNS Mixed Use North State area—what buffers are required?

Integrate landscaping throughout the site, protect mature trees, and shade parking where practical. Where residential uses abut non‑residential, you must landscape the separation area, and if next to Agricultural Land provide a ≥6‑ft fence/wall and a 50‑ft setback; no barbed/concertina wire (§ 20.085.055; § 20.087.055(2)(b)–(d)) .

How close can fences or shrubs be to corners and driveways?

They must stay out of required clear‑visibility areas. The exact dimensions are set in coordination with the County Department of Transportation, so verify before you build or plant (§ 20.152.020(A)(1), Table 20.152‑A) .

Are there special landscaping limits in the Town of Mendocino?

Yes. Within the Highway 1 scenic corridor, projects must maximize protection of public views, and screening may not obscure landmark structures like the Mendocino Presbyterian Church sanctuary from Highway 1 (§ 20.692.020(A)–(C)) .

Can I install razor or concertina wire for security?

Generally no—razor/concertina wire is prohibited unless you obtain an administrative permit demonstrating a specific security need (or a higher law requires it) (§ 20.152.020(E)) .

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