Local zoning · Los Altos

Los Altos — Landscaping and Screening

Q: Do I need a permit to build a fence in Los Altos?

You must follow the fence height and location limits in § 14.72.020 ; building permits or design review may be required for some fences (for example, solid fences/walls over 6 ft or certain solid walls are subject to administrative design review). See § 14.72.020 and § 14.77.020 .

Q: What are the maximum allowed fence heights?

The general maximum is 6 ft ; within required front yards and within 5 ft of the exterior side property line of a corner lot the limit is 4 ft . Visibility triangles at street intersections and driveways further reduce allowed heights. See § 14.72.020 .

Q: How must parking areas be screened from streets and sidewalks?

Downtown and neighborhood commercial districts require a landscaped buffer between parking and street frontage (commonly ≥5 ft ) and interior parking landscaping (percentages scale: 5% / 7.5% / 10% depending on parking area). Service/refuse areas must be screened. See § 14.44.090 , § 14.34.110 , and § 14.48.090 .

Landscaping and Screening under the Los Altos local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes what the City of Los Altos zoning ordinance (Title 14) requires for landscaping, screening, buffers, and fences/walls, and where those rules live in the code. It is focused on land‑use/zoning standards (Title 14) — not building code (Title 24) or permit forms. Where the code text gives a numeric or programmatic standard I cite the controlling §; where the uploaded materials do not state a rule, I say "Not found in retrieved materials." For related topics see the city's pages on Los Altos Zoning, Los Altos Development Standards, and Los Altos Design Review.

Key rules (plain-English, code citations)

Maximum ordinary fence/wall height is 6 ft; fences inside a required front yard or within 5 ft of an exterior side property line on a corner lot are limited to 4 ft. Visibility triangles reduce allowed heights at intersections and driveways. Exceptions exist (noise attenuation, acoustical analysis, public works, etc.). See § 14.72.020 and related fence rules.
Fences/walls that are dangerous to people (barbed wire, electrified) are restricted near streets/walkways. See § 14.72.030.
Planned Unit Developments (PUD) that border single‑family zones must provide screening for privacy, aesthetics, and noise. Acceptable screening elements include masonry walls, board fences, and compact evergreen hedges; a dedicated 10‑foot planting strip with a 6‑ft solid fence or wall plus an evergreen planting screen is required where PUD sites abut single‑family districts. See § 14.62.110 (screening & landscaping) and related PUD yard rules § 14.62.090.
Multi‑family, commercial, and downtown districts include explicit landscape buffer and parking screening requirements (landscaped strip widths, interior parking landscaping percentages, planting trees, and required landscape along building edges). See § 14.34.110, § 14.44.090, § 14.48.090, and related parking/landscape rules cited below.
Single‑family objective design standards require landscaping minimums (for example, a minimum of 50% of required front yard setback must be landscaped in certain single‑family objective standards). They also require on‑site tree minimums and set standards for screening vegetation (e.g., evergreen screening vegetation reaching 15–20 ft at maturity where second‑story sightlines would intrude) and compliance with the City's Water Efficiency Landscape Ordinance (WELO). See § 14.64.100.
Where a higher fence/wall is needed for noise attenuation at commercial/residential interfaces, the code allows walls taller than 6 ft (sometimes up to 12 ft) when supported by acoustical analysis or as required under specific district standards. See § 14.36.030 and other district references.
Mechanical equipment, service and trash areas, and transformer pads must be screened architecturally or with plantings; rooftop mechanical equipment must be screened from public view. See § 14.77.070(H) and district design standards that call for screening.
Administrative relief exists: the Zoning Administrator may approve administrative modifications of standards (including wall/fence heights and landscaped area reductions) up to 10%; variances follow the variance procedures. See § 14.01.120 (administrative modifications) and § 14.81.020 (variances).

District-by-district breakdown

Below are the Los Altos districts where the zoning code explicitly addresses landscaping and screening, with the code references you will use when designing or reviewing plans. District names and § citations are Los Altos' own.

PUD (PUD/R, PUD/OA, PUD/C, PUD/SC)

Purpose / typical uses: Planned unit developments for residential, office, or commercial mixes — regulated by the PUD chapter. See § 14.62.090 for yard rules.
Key landscaping/screening rules: Where a PUD abuts a single‑family district the site must provide screening and landscaping to ensure privacy and noise attenuation. Screening may be masonry walls, board fences, compact evergreen hedges; a 10‑ft planting strip abutting the single‑family property with a 6‑ft solid fence or wall outside the plantings is required and must be permanently maintained. No parking is allowed in required landscaped areas. See § 14.62.110.

OA‑1 / OA‑4.5 (Office‑Administrative)

Purpose: Office districts with residential adjacency sensitivity; emphasis on front‑yard landscaping and residential scale. See § 14.36.020.
Key landscaping/screening rules: General screening standard obligates developments to provide sufficient screening to protect neighboring residential properties; walls up to 12 ft may be required for noise attenuation when supported by an acoustical analysis. Refuse and service areas must be screened or enclosed. See § 14.36.030.

CN (Commercial Neighborhood)

Purpose / uses: Low‑scale neighborhood commercial and mixed use. See Chapter 14.40.
Key landscaping/screening rules: Parking and service areas must be buffered from streets and neighboring uses; service areas are required at the rear and have screening requirements (see references to Chapter 14.66 and specific CN subsections). See § 14.40.110 and related CN standards.

CD (Commercial Downtown)

Purpose / uses: Downtown village core, pedestrian focus. See § 14.44.020.
Key landscaping/screening rules: Downtown requires small front yard landscaping, landscaped strips along particular thoroughfares, and a landscaped buffer (≥5 ft) between parking and street frontage or building faces; trash/refuse must be enclosed and screened with walls and planting. See § 14.44.060–090.

R3 — Multi‑family districts (examples: R3‑1, R3‑1.8, R3‑3, R3‑5)

Purpose: Multi‑family housing, with design controls to address neighborhood impacts. See Chapters 14.24, 14.22, 14.20, 14.18.
Key landscaping/screening rules:
- Interior parking areas, parking lot landscaping percentages, and planters are required; low walls/hedges must screen street‑edge parking. See multiple multi‑family district design standards (e.g., § 14.24. and § 14.22. references).
- Where a multi‑family side or rear yard abuts R1‑10, the first 10 ft next to the single‑family property frequently must include a 6‑ft solid fence or wall outside a planting screen (evergreen trees or bushes as approved). See examples in § 14.18.070/080 for R3‑5.

R1 (single‑family objective design / R1‑10, R1‑20, R1‑40)

Purpose / uses: Single‑family residential zones. See Chapters 14.06, 14.10, 14.12.
Key landscaping/screening rules:
- Objective design standards require on‑site tree plantings (lot‑size based minima), screening vegetation for second‑story sightlines, permanent irrigation, and compliance with the City's WELO. Evergreen screening height expectations (mature 15–20 ft) are specified in the objective standard text. See § 14.64.100 (objective design standards and landscaping/screening vegetation).
- Many single‑family district subsections require a minimum fraction of front yard area to be landscaped (for example 50% in some R1 subsections). See § 14.06.060 and the notes under § 14.64.100.

Quick reference table — decision‑relevant standards

Topic / Decision point	Standard or requirement (plain English)	Code Reference
Ordinary fence/wall height	Max 6 ft, except 4 ft within required front yards or within 5 ft of an exterior side property line on a corner lot; visibility triangles further limit heights at intersections/driveways	§ 14.72.020
High fence/wall exceptions	Walls >6 ft allowed for noise attenuation, assessment projects, public road projects, or when acoustical analysis justifies them	§ 14.72.020(F)
Dangerous fences	Barbed/electrified fences restricted within 10 ft of streets/walkways	§ 14.72.030
PUD buffer next to R‑1	10‑ft planting strip abutting single‑family property; 6‑ft solid fence/wall outside the planting screen; planting and maintenance required (no parking in required landscaped area)	§ 14.62.110
Single‑family landscaping / screening	Minimum trees by lot size; screening vegetation for second‑story sightlines; evergreen species 15–20 ft at maturity; comply with WELO	§ 14.64.100
Parking lot landscaping	Setbacks/buffers (commonly ≥5 ft) and interior landscaping percentages (5% / 7.5% / 10% tiers depending on parking area)	§ 14.34.110, § 14.48.090, § 14.50.150
Screening of service/trash/mechanical	Service/trash/utility areas must be screened architecturally and/or with planting; rooftop mechanical equipment must be screened	§ 14.77.070(H) and district design standards § 14.24/14.34/14.40
Administrative modifications	Zoning Administrator may modify standards (including landscaped areas, wall/fence heights) up to 10% via administrative modification / design review	§ 14.01.120

Checklist

Confirm the zoning district for the parcel (e.g., R1‑10, R3‑5, CN, CD, PUD) and read that district's landscaping/screening subsections. Verify in § 14.06 / 14.18 / 14.34 / 14.44 / 14.62 as applicable.
For fences/walls: confirm height limits at the proposed location (front yard vs rear/side yard; driveway and street intersection triangles). See § 14.72.020.
If proposing a tall wall for noise attenuation or a PUD buffer, obtain the required acoustical analysis or show compliance with PUD planting + wall requirements; cite § 14.62.110 and § 14.36.030 as relevant.
Provide a landscape plan showing species, mature heights, irrigation, and maintenance responsibility; confirm WELO compliance where the code requires it. See § 14.64.100.
Screen service/trash/transformer/utility areas architecturally and with planting per the district rules (CD/CN/CRS examples in § 14.44, § 14.40, § 14.48).
If you need a modification (e.g., >6‑ft fence, smaller landscaped area), prepare an administrative modification/design review packet; see § 14.01.120 and design review rules § 14.77.

Risks & Ambiguities

Issue	Why it matters	What to verify
Exact fence height at a particular lot corner or driveway	Driveway and intersection visibility triangles and corner‑lot orientations change allowed height	Confirm orientation on site plan and apply § 14.72.020 visibility triangle rules; verify any city‑planner exceptions.
Whether evergreen screening requirement applies to a specific second‑story window	The objective standard applies to second‑story windows with sill <5 ft and to decks/balconies — applicability varies with project type	Check § 14.64.100 for the objective standard language and whether your project triggers objective design review. If unclear, "Verify with the jurisdiction."
Need for walls taller than 6 ft (noise vs. privacy)	Taller walls require justification (acoustical analysis) and often additional design review	If proposing >6 ft for attenuation, supply acoustical analysis and cite § 14.36.030 / district rules.
Landscape species and fire hazard / defensible space	City landscaping rules may intersect state wildfire/defensible‑space rules	The code requires drought‑resistant, WELO compliance and street tree lists (§ 14.64.100 and Objective Standards); for fire hazard areas consult fire codes and WUI guidance — "Verify with the jurisdiction" and fire authority.
Applicability of design review vs. ministerial permits	Some fences/walls, landscaping tied to discretionary review	Administrative design review is required for some items (e.g., solid fences/walls >6 ft) — see § 14.77.020; determine whether your project is exempt or requires review.

Plain‑English Summary

Los Altos' zoning code controls where and how you screen neighbors and hide service areas: fences are generally limited to 6 ft tall (4 ft in front yards), PUDs and multi‑family projects must provide planting buffers and sometimes a 6‑ft wall plus evergreen plantings next to single‑family lots, parking lots and service areas must be buffered with planting and/or walls, and single‑family objective standards require trees and evergreen screening in some second‑story sightlines — all shown in Title 14 (see the §§ cited). Always check the district rules and whether design review or an administrative modification is needed.

Source References

Los Altos zoning — Fence regulations: § 14.72.020, § 14.72.030.
PUD screening and landscaping — § 14.62.090, § 14.62.110.
Objective design standards, landscaping and screening vegetation — § 14.64.100 (trees, screening veg, WELO).
OA screening (noise attenuation, walls up to 12 ft) and refuse/service screening — § 14.36.030.
Parking/landscape buffer and interior landscaping percentages — § 14.34.110, § 14.48.090, § 14.50.150.
Design review and screening of rooftop mechanical equipment — § 14.77.070(H) and Chapter 14.77 (design review rules).
Administrative modifications and variance authority (modifying landscaped areas, wall/fence heights up to 10%) — § 14.01.120 and § 14.81.020.

If you want, I can extract the exact subsection language for a single parcel's district (e.g., the R1‑10 or R3‑5 rules) and prepare a short checklist formatted for a plan set. Verify parcel zoning before applying these rules — parcel‑specific conditions (overlays, historic status, assessments) can change which subsections apply. See the city overview at Los Altos zoning & planning overview and the code chapters referenced above for the full text.

Sources

Retrieved passages

Los Altos Zoning Code (Section 14.62.210) High relevance
Los Altos Zoning Code (§ 1) High relevance
Los Altos Zoning Code (§ 10-2.1313) High relevance
CFC § 1 (§ 1) High relevance
Los Altos Zoning Code (Section 14.66.280) High relevance
Los Altos Zoning Code (Article 1) High relevance
Los Altos Zoning Code (Title 13) High relevance
Los Altos Zoning Code (section or) High relevance
Los Altos Zoning Code High relevance
Los Altos Zoning Code (§ 1) High relevance
Los Altos Zoning Code (Section 14.66.280) Medium relevance
Los Altos Zoning Code Medium relevance
Los Altos Zoning Code (Chapter 14.14.) Medium relevance
Los Altos Zoning Code (§ 1) Medium relevance
Los Altos Zoning Code (Chapter 14.78) Medium relevance
Los Altos Zoning Code High relevance
CFC § 1 (§ 1) High relevance
CFC § 10 (chapter or) High relevance
Los Altos Zoning Code (§ 1) High relevance
Los Altos Zoning Code (§ 10-2.1411) High relevance
Los Altos Zoning Code (§ 1) Medium relevance
Los Altos Zoning Code (§ 1) Medium relevance
Los Altos Zoning Code (§ 3) Medium relevance
CBC § 1 (§ 1) Medium relevance
Los Altos Zoning Code (Section 14.66.280) Medium relevance

Cited sections

Official Los Altos code library

Frequently asked questions

Do I need a permit to build a fence in Los Altos?

You must follow the fence height and location limits in § 14.72.020; building permits or design review may be required for some fences (for example, solid fences/walls over 6 ft or certain solid walls are subject to administrative design review). See § 14.72.020 and § 14.77.020.

What are the maximum allowed fence heights?

The general maximum is 6 ft; within required front yards and within 5 ft of the exterior side property line of a corner lot the limit is 4 ft. Visibility triangles at street intersections and driveways further reduce allowed heights. See § 14.72.020.

When can a wall be taller than 6 feet?

Walls taller than 6 ft are allowed for specific purposes such as noise attenuation (often supported by acoustical analysis), certain public road projects, and specific district provisions (e.g., PUD or commercial/residential interface). See § 14.72.020(F) and district screening rules (for example § 14.36.030 and § 14.62.110).

What screening is required where a multi‑family project borders single‑family homes?

Several multi‑family and PUD provisions require a buffer: commonly the first 10 ft next to the single‑family property must include a 6‑ft solid fence or wall with an evergreen planting screen (species/spacing as approved). See § 14.18.070 / § 14.18.080 for R3‑5 examples and § 14.62.110 for PUDs.

Are there specific plant/tree requirements for single‑family projects?

Yes — the objective standards require minimum tree plantings by lot size and require screening vegetation when second‑story sightlines would intrude; required screening vegetation is specified as evergreen species reaching 15–20 ft at maturity and requiring permanent irrigation. Projects must comply with the City's WELO. See § 14.64.100.

How must parking areas be screened from streets and sidewalks?

Downtown and neighborhood commercial districts require a landscaped buffer between parking and street frontage (commonly ≥5 ft) and interior parking landscaping (percentages scale: 5% / 7.5% / 10% depending on parking area). Service/refuse areas must be screened. See § 14.44.090, § 14.34.110, and § 14.48.090.

Does screening of mechanical equipment appear in the zoning code?

Yes — design review findings and district standards require mechanical equipment and service/trash areas to be screened from public view and designed consistent with building architecture. See § 14.77.070(H) and applicable district design standards.

Can the city reduce a landscaping requirement for my constrained property?

The Zoning Administrator can approve administrative modifications to certain standards (including landscaped areas and wall/fence heights) up to 10%, processed as design review. Variances are a separate, discretionary path. See § 14.01.120 and § 14.81.020.

Is there anything about historic properties and landscaping/fences?

Historic properties on the city's inventory may be exempted from historical commission review for minor landscaping or fence changes if they do not adversely affect the historic resource; see the Historic Preservation chapter for the process. Not all details are here — consult the historic chapter for parcel‑specific rules. See the historic chapter references in the code.

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