Local zoning · Tuolumne County

Tuolumne County — Landscaping and Screening

Q: If my lot is industrial, can my screening be higher than 8 feet?

Yes — the code allows screening to a height of 10 feet in industrial land uses (versus 8 feet in non‑industrial uses). § 17.90.040(D)

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

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Last reviewed: July 3, 2026

Overview

This page summarizes what the Tuolumne County zoning ordinance requires for landscaping, screening, buffers, fences, walls, and trees in the unincorporated areas of Tuolumne County. It pulls the county's development and screening rules (general standards, surface parking screening, outdoor-storage and storage‑container rules, and special standards for self‑storage and historic areas) and explains how they apply by district. For parking‑related landscaping and lot screening see the county Tuolumne County Parking guidance; for how landscaping interacts with other dimensional rules see Tuolumne County Development Standards.

NOTE: these rules apply only in unincorporated areas of Tuolumne County. Verify parcel‑specific requirements with the Community Development Department.

Key county rules (plain list)

Outdoor storage must be screened by solid walls, finished fencing (including chain link with slats), or drought‑tolerant vegetation that provides screening within one year and is maintained with automatic irrigation where required — § 17.90.040 .
Screening heights permitted: screening walls/fences for non‑industrial uses are limited to 8 feet above finished grade; for industrial uses screening may be up to 10 feet — § 17.90.040(D) .
Surface parking lots for new commercial developments are required to be screened from street views using landscape screening, walls/facades, or public art (but screening must not interfere with sight triangles) — § 17.22.050 .
Storage containers: must meet setbacks; containers >200 sq ft need building permit; in MU, R, and RE zones only one container (≤360 sq ft) allowed and it must be placed behind or to the side of the principal building; visible containers must be screened with fencing or landscaping; in C, M, BP, P, K districts a landscaping/screening plan must be approved before installation — § 17.90.070 .
Self‑storage facility standards require outdoor storage to be screened from public view; exterior walls facing streets/residential districts must be decorative block, concrete panel, stucco or similar and include architectural relief; where perimeter fencing is used a minimum 6‑ft security fence (max 8 ft) is required in locations where buildings don’t form a perimeter barrier; screening walls are to be constructed of decorative block, stucco, etc. — § 17.90.080 .
The Community Development Director and approving authorities can impose conditions (including special setbacks, buffers, fences, walls and screening) as part of Use Permits, Site Development Permits, Planned Unit Development (PUD) approvals, and other discretionary approvals — § 17.98 (Use Permit: conditions & findings) .
The Historic Combining or H district allows modification or reduction of minimum landscape area with Director approval (landscape credit for planters/window boxes is allowable) — § 17.20.020(C)(3) .

District-by-district landscaping & screening breakdown

Note: where the code gives district‑specific screening rules those are cited below. When the code points to a general requirement (e.g., Chapter 17.90 development standards), that rule applies in the district per the use‑specific provisions.

Residential — R‑1, R‑2, R‑3, RE‑1, RE‑2, RE‑3, RE‑5, RE‑10

Purpose & typical uses: single‑family and small multi‑family residential, rural estate parcels; open space/residential estates in RE. The zoning chapter confirms landscape and spacing rules apply in these districts (development standards Chapter 17.22 and accessory structure rules in Chapter 17.22) — § 17.22.010–.050 .
Landscaping & screening specifics: storage containers visible to neighbors must be screened by fencing or landscaping in MU, R, RE zones; detached accessory structures and fences must respect setback projection rules — § 17.90.070 and § 17.22.040 .
Key dimensional standards to watch: for accessory structures in residential zones a detached accessory structure placed at a setback line may be no higher than 8 feet at the setback line; projections and minimum separation rules apply — § 17.22.040 .
Where it applies: all unincorporated residential parcels; small‑scale screening often handled administratively (Director) unless a Use Permit or Site Development Permit is required.

Mixed‑Use / Commercial — MU, C‑1, C‑2, C‑K, C‑S, BP

Purpose & typical uses: commercial, retail, offices, mixed residential/commercial. See underlying district tables for permitted uses. Landscape and screening are emphasized for new commercial developments, particularly surface parking screening — § 17.22.050 .
Landscaping & screening specifics: outdoor storage for commercial properties must be screened from the public right‑of‑way — § 17.90.050 . Storage containers in these districts require a reviewed landscaping/screening plan prior to installation — § 17.90.070(C) .
Key dimensional standards: typical screening height limit of 8 ft for non‑industrial uses applies unless a different standard is approved as part of a discretionary permit — § 17.90.040(D) .
Where it applies: unincorporated commercial corridors and neighborhood centers. For parking lot design, consult Tuolumne County Parking and the county’s development standards.

Business Park / Planned — BP, P, PD

Purpose & typical uses: larger commercial or office campuses, planned developments. The PUD/PD approval process routinely includes landscape and maintenance standards; the approving body may require fences, walls and screening as conditions — § 17.30 (parking) and § 17.24 (PUD conditions) .
Landscaping specifics: perimeter landscaping, integrated screening with architecture, and long‑term maintenance covenants are typical conditions under Planned Unit Development approvals — § 17.24.0(E) .
Where it applies: larger site plans where screening and coordinated landscaping are part of the site plan review.

Industrial — M‑1, M‑2

Purpose & typical uses: manufacturing, heavy equipment, storage, warehouses. Code requires that outdoor storage be screened so it is not visible from roadways unless topography makes that infeasible; storage can have higher screen heights (up to 10 ft) — § 17.90.060 and § 17.90.040(D) .
Self‑storage specifics: self‑storage facilities face stricter wall/fence design and perimeter screening rules; exterior walls visible from public streets or residential districts must be higher‑quality materials with architectural articulation; fences where used must meet the minimum 6‑ft security fence requirement and may be up to 8 ft high — § 17.90.080 .
Where it applies: industrial parcels and sites with outdoor materials storage.

Agricultural — A, AE‑37 (and similar)

Purpose & typical uses: farming, ranching, timber. The code allows storage containers primarily for agricultural use and requires containers visible to neighboring homes or roadways to be screened with fencing or landscaping — § 17.90.070(D) .
Where it applies: unincorporated agricultural parcels; if development exceeds certain thresholds, other landscape/screening requirements may be applied as conditions via discretionary permits.

Historic Combining / H District — H / HDP

Purpose & typical uses: protect cultural and historic resources. Uses are those of the underlying zone, but exterior alterations and demolition in an H district generally require a Use Permit; the Director may reduce minimum required landscape area established in Chapter 15.28 and may allow alternative landscaping credits (planters, window boxes) — § 17.20.020(C) .
Screening/landscaping specifics: because the H district allows modification of development standards, the Director can approve reduced landscape areas and alternative treatments consistent with historic preservation objectives — § 17.20.020(C)(3) .
Where it applies: properties zoned with the Historic Combining District overlay — check the overlay maps at Tuolumne County Overlay Districts.

Quick Reference Table — decision‑relevant standards

Requirement / Topic	What the code requires	Applies to	Code reference
Outdoor storage screening method & maintenance	Solid walls, wood fencing, chain link with slats, or drought‑tolerant vegetation providing adequate screening within one year; automatic irrigation/maintenance required	All zones with outdoor storage	§ 17.90.040
Screening height limits	Max 8 ft (non‑industrial); up to 10 ft in industrial uses	Non‑industrial vs industrial	§ 17.90.040(D)
Surface parking screening strategies	Landscape trees, walls/facades, or public art; must not obstruct sight triangles	New commercial developments	§ 17.22.050
Storage container rules	Must meet setbacks; >200 sq ft needs building permit; MU/R/RE capped at one container ≤360 sq ft placed behind/side; visible containers must be screened	All zones (with zone‑specific limits)	§ 17.90.070
Self‑storage facility screening & fencing	Perimeter fencing min 6 ft security fence where needed; max fence 8 ft; screening walls of decorative block/stucco and architectural relief	Self‑storage & recycling processing uses	§ 17.90.080
Discretionary permit conditions	Approving authority may require setbacks, buffers, fences, walls, screening, and landscaping maintenance	Use Permits, Site Dev Permits, PUDs	§ 17.98 (Use Permit: conditions & findings)
Historic district landscaping	Director may reduce Chapter 15.28 landscape minima; alternate credits allowed (planters/window boxes)	Properties in Historic (H) District	§ 17.20.020(C)(3)

Checklist (what an applicant must provide)

A scaled landscape and screening plan showing all proposed planting, fences, walls, and screening structures; show finished grades (to confirm max heights) — see § 17.90.040 .
Species list showing drought‑tolerant selections where required and irrigation method (automatic timer where code requires) — see § 17.90.040(A) .
For surface parking, a screening strategy that preserves sight triangles and shows tree species and spacing — see § 17.22.050 .
If installing storage containers: documentation of size, setback compliance, and whether a building permit is required (>200 sq ft), and a screening plan if visible from neighboring homes or roadways — § 17.90.070 .
For self‑storage or similar intensive uses: wall/fence materials and elevations demonstrating compliance with decorative material and height rules; show gates and architectural treatments — § 17.90.080 .
If in a Historic (H) district: a narrative explaining compatibility with historic character and a request for any landscape area modification, per § 17.20.020(C) .
If your project needs discretionary approvals (Use Permit, PUD, Site Development Permit): include operations and maintenance commitments for landscaping and screening because conditions may be imposed — § 17.98 .
Verify whether design review is required for your project (see Tuolumne County Design Review) and coordinate with building setbacks shown in Tuolumne County Development Standards.

Risks & Ambiguities

Issue	Why it matters	What to verify
Measurement of fence/wall height relative to “finished grade”	Height limits (8 ft/10 ft) are measured from finished grade and can be affected by grading or retaining walls	Confirm how the County measures grade on your parcel with staff and show grade on plans — verify with Community Development. Code: § 17.90.040(D)
Historic Combining District exceptions	The Director may reduce landscape minimums, which affects required planting and screening	If in an H/HDP overlay, verify whether the Director has applied reductions or requires design review; see § 17.20.020(C)
Wildfire‑clearance vs. dense screening (trees/shrubs)	Fuel‑reduction requirements (state/local fire rules) can conflict with dense vegetation used for screening	The zoning code does not resolve WUI/fire clearance conflicts here — verify clearance and defensible‑space rules with Fire Prevention; state building/WUI rules may apply (verify with local Fire and Building). (Not found in retrieved Tuolumne County zoning materials)
“Adequate screening” standard is qualitative	The code uses terms like “adequate” and “architecturally integrated” that require interpretation	Expect the Director or approving authority to interpret; confirm discretionary review criteria early in pre‑application meeting — see § 17.90.040 and § 17.98
Storage container thresholds and permits	Size thresholds and zone limits vary; exceedances trigger building permits or discretionary review	Confirm container dimensions, zoning district limits (MU/R/RE/C/M/BP/P/K) and whether multiple containers require nonconforming‑use review — § 17.90.070

Plain‑English summary

Tuolumne County requires that things stored outside, parking lots, and visible storage containers be hidden from public view using walls, fences, or drought‑tolerant plants that work within one year and are kept watered and maintained; typical screening walls are limited to 8 feet in non‑industrial settings (10 feet in industrial settings). The county often leaves the final configuration to the Director or permit authority as part of discretionary approvals, and the Historic overlay can change landscape minimums — always submit a clear landscape/screening plan and check with Community Development before you build. See § 17.90.040 and § 17.22.050 for the core requirements.

Source References

Tuolumne County Zoning Code — Outdoor storage screening, general development & performance standards: § 17.90.040
Tuolumne County Zoning Code — Commercial outdoor storage standards: § 17.90.050
Tuolumne County Zoning Code — Industrial outdoor storage standards: § 17.90.060
Tuolumne County Zoning Code — Storage containers rules: § 17.90.070
Tuolumne County Zoning Code — Self‑storage facility screening, materials, fencing: § 17.90.080
Tuolumne County Zoning Code — Surface parking screening requirements: § 17.22.050
Tuolumne County Zoning Code — Historic Combining (H) District landscape modifications: § 17.20.020(C)(3)
Tuolumne County Zoning Code — Use Permit conditions and findings (authorities may require buffers, fences, etc.): § 17.98
For statewide fire/WUI rules and technical guidance (context only — Tuolumne County defers to fire authority and state codes for clearance and combustibility): 2025 California Wildland‑Urban Interface Code (referenced here for context)
Tuolumne County zoning & planning overview: Tuolumne County zoning & planning overview
Tuolumne County Zoning: Tuolumne County Zoning
Tuolumne County Development Standards: Tuolumne County Development Standards
Tuolumne County Parking: Tuolumne County Parking
Tuolumne County Design Review: Tuolumne County Design Review
Tuolumne County Overlay Districts (for HDP/H maps): Tuolumne County Overlay Districts
Tuolumne County Historic Preservation: Tuolumne County Historic Preservation
California Building Standards Code / Title 24 (building/fire rules): California Building Standards Code

Sources

Retrieved passages

Tuolumne County Zoning Code (Chapter shall) High relevance
Tuolumne County Zoning Code High relevance
Tuolumne County Zoning Code (title recognizes) High relevance
CFC § 2808 (Section 2808) High relevance
CFC § 2808 (Chapter 17.32) High relevance
CWUIC § 65850.6 (Title 24) High relevance
CBC § 14.04.360 (Chapter 17.30) Medium relevance
Tuolumne County Zoning Code (Chapter 17.100) Medium relevance

Cited sections

Tuolumne County Zoning Code — Outdoor storage screening, general development & performance standards: **§ 17.90.040** (§ 17.90.040)
Tuolumne County Zoning Code — Commercial outdoor storage standards: **§ 17.90.050** (§ 17.90.050)
Tuolumne County Zoning Code — Industrial outdoor storage standards: **§ 17.90.060** (§ 17.90.060)
Tuolumne County Zoning Code — Storage containers rules: **§ 17.90.070** (§ 17.90.070)
Tuolumne County Zoning Code — Self‑storage facility screening, materials, fencing: **§ 17.90.080** (§ 17.90.080)
Tuolumne County Zoning Code — Surface parking screening requirements: **§ 17.22.050** (§ 17.22.050)
Tuolumne County Zoning Code — Historic Combining (H) District landscape modifications: **§ 17.20.020(C)(3)** (§ 17.20.020)
Tuolumne County Zoning Code — Use Permit conditions and findings (authorities may require buffers, fences, etc.): **§ 17.98** (§ 17.98)
For statewide fire/WUI rules and technical guidance (context only — Tuolumne County defers to fire authority and state codes for clearance and combustibility): 2025 California Wildland‑Urban Interface Code (referenced here for context)
Tuolumne County zoning & planning overview: Tuolumne County zoning & planning overview
Tuolumne County Zoning: Tuolumne County Zoning
Tuolumne County Development Standards: Tuolumne County Development Standards
Tuolumne County Parking: Tuolumne County Parking
Tuolumne County Design Review: Tuolumne County Design Review
Tuolumne County Overlay Districts (for HDP/H maps): Tuolumne County Overlay Districts
Tuolumne County Historic Preservation: Tuolumne County Historic Preservation
California Building Standards Code / Title 24 (building/fire rules): California Building Standards Code (Title 24)
TuolumneCounty_ZoningCode.md
2025 California Wildland-Urban Interface Code.md

Frequently asked questions

What are Tuolumne County’s basic screening requirements for outdoor storage?

Outdoor storage must be screened by solid walls, wood fencing, chain link with slats, or drought‑tolerant vegetation that provides adequate screening within one year and is maintained (automatic watering where required); screening heights are limited to 8 ft for non‑industrial uses and 10 ft in industrial uses. § 17.90.040

Do parking lots need to be screened from the street in unincorporated Tuolumne County?

Yes — surface parking lots for new commercial developments should be screened from street views using landscape screening (trees), screening structures or facades, or public art, provided sight triangles are maintained. § 17.22.050

Are there special fence or wall material requirements?

For uses like self‑storage or recycling processing, screening walls are required to be decorative block, concrete panel, stucco, or similar materials and include architectural relief; perimeter security fences for self‑storage where needed must be at least 6 ft high (up to 8 ft max) — § 17.90.080

Can the County reduce landscape area requirements in historic districts?

Yes — within the Historic Combining or H district the Director may reduce minimum landscape area requirements (Chapter 15.28) and may approve landscaping credits such as planters and window boxes. § 17.20.020(C)(3)

What rules apply if I want to use a shipping/storage container on my parcel?

Storage containers must meet building setbacks; any container over 200 sq ft requires a building permit; in MU, R, and RE zones only one container ≤360 sq ft is allowed and must be behind or to the side of the primary building; visible containers must be screened and in commercial/industrial zones a landscaping/screening plan must be approved before placement. § 17.90.070

Will a Use Permit force me to add landscaping or screening?

Yes — the approving authority for discretionary permits (Use Permits, PUDs, Site Development Permits) may impose conditions including special setbacks, buffers, fences, walls and screening as necessary to make findings and protect neighborhood welfare. § 17.98

How quickly must plantings provide screening?

If drought‑tolerant vegetation is used to accomplish screening, the vegetation must provide adequate screening within one year of planting and be maintained with an automatic watering system equipped with a timer when required. § 17.90.040(A)

Are parking lot trees acceptable as screening?

Yes — the code specifically lists trees scaled to the space as an acceptable landscape screening strategy for surface parking lots, so long as sightlines are preserved. § 17.22.050

If my lot is industrial, can my screening be higher than 8 feet?

Yes — the code allows screening to a height of 10 feet in industrial land uses (versus 8 feet in non‑industrial uses). § 17.90.040(D)

Does the zoning code resolve conflicts between dense screening vegetation and wildfire defensible‑space rules?

Not explicitly in the retrieved zoning materials. Wildfire defensible‑space and combustibility requirements are controlled by fire authority and state building/WUI codes; verify with Tuolumne County Fire Prevention and the Building Division. (Not found in retrieved Tuolumne County zoning materials)

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