Local zoning · Foster City

Foster City — Landscaping and Screening

Q: What materials can I use for a permanent fence in Foster City?

Permanent fences and walls must use materials like redwood, cedar, brick, stone, stucco, cement, wrought iron or similar as allowed by the community development director; vinyl and chain‑link are generally prohibited for permanent fencing, except in limited commercial/industrial situations (§ 17.52.040 ).

Q: How tall can a front‑yard fence be on an R-1 lot?

The baseline is 40 inches in the front yard. A 6‑foot fence in the front yard is only allowed under a set of exceptions (setback from sidewalk, 50% open materials, director approval and visible landscaped area consistency) — see § 17.52.010 .

Q: Are hedges treated differently from fences?

Yes. Hedges in front yards are limited to 40 inches when planted parallel to the street; in other configurations hedges may reach 6 ft (with visibility/driveway rules applied). Hedges are also required to be maintained in a healthy condition (§ 17.52.010 and § 17.52.020 ).

Landscaping and Screening under the Foster City local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes what the Foster City zoning ordinance requires for landscaping and screening — covering parking-lot landscaping, fences, walls, hedges, street trees, and screening for utilities, mechanicals and service areas. It is based on Foster City’s zoning chapters (not state building code) and interprets where each rule applies and how applicants typically comply. All requirements below are tied to the municipal code citations so you can verify details with the city.

When the page mentions related topics the first time they are linked: Foster City zoning & planning overview, zoning, development standards, parking, design review, overlay districts, ADUs, and the California Building Standards Code.

Rules and how they apply — district by district

Notes up front

Chapter 17.52 is the primary place for rules on fences, walls and hedges (front yards, side/rear yards, corner lots, materials, exceptions, and exception/appeal process) — see § 17.52.010 through § 17.52.070.
Parking-lot and site landscaping, tree and stormwater/green-area requirements appear in the city’s parking/site standards (Chapter 17.62 and related development standards) and design standards (Chapter 17.96) — see Chapter 17.62 and § 17.96.010.

R-1 (Single-Family Residence) — where most homeowners are

Purpose & typical uses: single-family homes and accessory uses; standards in Chapters 17.12–17.34 apply to the primary districts.
Landscaping/screening rules that matter here:
- Front-yard fences and walls in R-1: maximum 40 inches (3 ft 4 in) unless exceptions apply; hedges in front yards limited to 40 inches when parallel to the street (§ 17.52.010) — exceptions and measurements defined in § 17.52.010 and § 17.52.040.
- Side/rear yard fences/walls: generally 6 ft max in side and rear yards; wood fences up to 7 ft allowed if upper foot uses 50% open lattice (§ 17.52.020).
- Waterfront residential exceptions: stepped rear-yard height limits up to 72 inches in certain rear-yard bands to preserve lagoon views — see the waterfront diagrams and subsection rules (§ 17.52.010, waterfront portions).
- Visibility triangles/corner-lot limits: no fence/wall/hedge > 40 inches in the required corner-sight triangle (§ 17.52.030).

Practical: homeowners proposing a taller or solid front-yard fence must use the set exception tests (setback from sidewalk, open-air materials, director review) or seek the administrative exception/appeal in § 17.52.070.

R-1/PD and PD (Planned Development)

Purpose & typical uses: PD allows site-specific flexibility (single-family, multi-family, mixed use) with a graphic general development plan; several standards (including maximum fence heights, setbacks and other dimensional controls) may be modified by a PD approval (§ 17.36.020).
Landscaping & screening: PD approvals commonly include bespoke landscape plans showing tree retention/planting, screening for service areas, and any variations from Chapter 17.52; verify the PD’s approved plan to see applicable exceptions (PD can waive maximum fence heights).

R-T, R-2, R-3, R-4 (Townhouse / Multi-family)

Purpose & uses: townhouse and multi-family districts have their own area/bulk and open-green requirements (see §§ 17.16, 17.14, 17.18, 17.20 for district tables). Landscaping expectations are higher in multifamily projects, which must also comply with Chapter 17.96 design standards.
Key standards:
- Multifamily projects must meet the objective design and site standards in § 17.96.010 et seq., including landscaping, pedestrian buffers and planting-size/placement expectations.
- Parking-lot landscaping and screening rules (Chapter 17.62) — e.g., minimum 10% of parking area landscaped and tree requirements (one 15‑gallon minimum tree per three parking stalls) — apply to non-residential and multi-family parking.

C-1, C-2, C-M, C-O (Commercial districts)

Purpose & uses: neighborhood and general commercial uses, subject to district-specific development standards (Chapters 17.24, 17.26, 17.28, 17.22). Commercial sites must comply with Chapter 17.62 for parking and landscaping and may have additional screening requirements for outdoor storage or collection facilities (e.g., screening fences 6–8 ft with landscape).
Screening of service areas and refuse: solid screening fencing and landscaping are required; permitted fence/wall materials are limited and vinyl/chain-link are generally prohibited for permanent fencing (§ 17.62 and § 17.52.040).

PF (Public Facilities), M-1 (Industrial), and special zones

Public/institutional projects (PF) and light industrial uses have specific rules: outdoor service areas, recycling/collection or light-processing yards must be screened (often 6–8 ft fencing plus landscaping) and may require conditional use permits or planning-commission review (§ 17.28 and other use-specific sections).

Most decision‑relevant standards (quick reference table)

Topic	Standard (what the planner/owner must check)	Code Reference
Front-yard fence height (residential noncorner lots)	40 in (exception to 6 ft if setback/50% open, director approval)	§ 17.52.010
Side/rear yard fence/wall (non-waterfront)	6 ft max; wood fences up to 7 ft with lattice above 6 ft	§ 17.52.020
Corner-lot visibility triangle	No fence/wall/hedge > 40 in within 25‑ft triangle (unless all-way stop)	§ 17.52.030
Allowed permanent fence materials	Redwood, cedar, brick, stone, stucco, wrought iron, tempered glass (waterfront rear/side) — vinyl/chain-link prohibited for permanent fences	§ 17.52.040
Parking-lot landscaping minimum	10% of total parking area landscaped; one 15‑gallon tree per 3 stalls; perimeter strip 4 ft	Chapter 17.62 (parking/landscaping)
Parking screening methods	Low walls (≤ 40 in), solid fences (≤ 40 in) or compact evergreen planting (2 ft min within 18 months), berms	Chapter 17.62 § (screening)
Street trees / minimum planting size	One tree per 30 ft of frontage; minimum 15‑gallon at planting; spacing to accommodate mature canopy	Chapter 17.62 / Estero code reference in landscaping rules
Screening for utilities/mechanical	Screen to height of equipment +12 in, or use durable walls/louvers/landscape; rooftop equipment must be screened by parapet or matching material	§ 17.62 (utilities screening) and Chapter 17.96 design standards
Maintenance / plant size plan	Detailed landscape plan required (species, size at planting and maturity, irrigation, maintenance schedule)	Chapter 17.62 (landscape plan requirements)

Practical guidance / interpretation (plain-English)

If you live in a single-family zone and want a front-yard fence, evaluate the 40‑inch baseline limit first; only with the specific setback/open-air materials tests and director review can you get to 6 ft (§ 17.52.010).
For any parking lot or commercial site, prepare a landscape plan showing the 10% planting area, tree locations (one 15‑gallon per three stalls), perimeter 4‑ft strips and curbs; coordinate species and irrigation with the Estero water-conservation standards cited in the code.
Waterfront properties have different rear-yard stepped height rules to protect lagoon views — check the waterfront subsections in § 17.52.010 and show your proposed yard segmentation on the landscape/fence plan.

Checklist

Confirm zoning district (e.g., R-1, R-T, R-3, C-2, PD) and consult the district chapter for open-green / setback requirements.
For fences/walls/hedges: verify proposed height vs. district limits and corner-visibility triangles (§ 17.52.010–030).
Provide a scaled landscape plan showing species, sizes at planting and maturity, irrigation method, and maintenance schedule (per Chapter 17.62).
For parking areas, show that at least 10% of parking area is landscaped, with required trees and planter sizing, curbs and spacing.
Use permitted permanent fencing materials and neutral colors; note that vinyl and chain-link are generally prohibited (§ 17.52.040).
If you need a taller/solid fence or a deviation, submit the exception request per § 17.52.070 and be ready for possible appeal.
Coordinate street-tree planting with Public Works standards and Estero district water-conservation rules.

Risks & Ambiguities

Issue	Why it matters	What to verify
Exact parking‑landscape section number	The ordinance places these rules in Chapter 17.62, but subsection numbering and cross-references appear across documents	Verify the exact subsection that applies to your project with planning staff (Chapter 17.62 / parking)
Waterfront fence height bands	Stepped heights are geometry-dependent (rear-yard depth bands) — incorrect measurement can lead to noncompliance	Confirm how rear-yard depth is measured from the rear wall nearest the water and apply the correct band rules in § 17.52.010
Materials classified as “permanent” vs “temporary”	Some materials are allowed only as temporary; using prohibited materials (e.g., vinyl) can trigger enforcement	Confirm material approval with community development director; cite § 17.52.040 for allowed materials
Interface with PD or overlay approvals	PDs and some overlays may waive fence/landscape rules	Check the PD’s adopted general development plan or overlay conditions (§ 17.36.020 for PD).
Tree canopy / public-right-of-way trees	Street tree planting is governed by public works/Estero standards beyond zoning	Coordinate with Public Works and Estero district (Chapter 17.62 references Estero code)

Plain‑English summary

Foster City’s zoning code limits front-yard fences to 40 inches unless you satisfy a handful of conditions, allows 6 ft fences in side/rear yards (with limited exceptions), and requires substantive landscaping and screening for parking lots and commercial/service areas (including 10% landscaping of parking, tree spacing, and detailed landscape plans). Always show a scaled landscape/fence plan to planning staff; exceptions and PD approvals can change the rules on a site-by-site basis.

Source References

Foster City Municipal Code, Chapter 17.52 (Fences, Walls and Hedges): §§ 17.52.010–17.52.070.
Foster City Municipal Code, Chapter 17.62 (Parking, landscaping, screening and site requirements) — parking-lot landscaping, screening, street trees and planting-size rules (see Chapter 17.62).
Foster City Municipal Code, Chapter 17.36 (Planned Development combining district) — PD flexibility and waivers. § 17.36.020.
Foster City Municipal Code, Chapter 17.96 (Multifamily and residential mixed-use objective design and development standards): § 17.96.010 (intent/purpose; landscaping and design expectations).
Estero Municipal Improvement District reference appearing in the Foster City landscape rules for water conservation (see Chapter 17.62 landscaping/stormwater management references).

Sources

Retrieved passages

Foster City Zoning Code High relevance
Foster City Zoning Code (§ 1) High relevance
CWUIC § 65850.6 (Title 24) High relevance
Foster City Zoning Code (Section 17.52.040.) High relevance
CBC § 1 (§ 1) High relevance
Foster City Zoning Code (Chapter 8.80) High relevance
CBC § 1 (§ 1) High relevance
Foster City Zoning Code (§ 1) High relevance
Foster City Zoning Code (Title 24) High relevance
Foster City Zoning Code (Chapter 8.80) Medium relevance
Foster City Zoning Code (§ 1) Medium relevance
Foster City Zoning Code Medium relevance
CWUIC § 1299.04 Medium relevance
Foster City Zoning Code (Chapter 17.82.) Medium relevance
Foster City Zoning Code (§ 2) Medium relevance
Foster City Zoning Code (Section 25250.11) Medium relevance
Foster City Zoning Code (Chapter 17.02) Medium relevance
Foster City Zoning Code (§ 2) Medium relevance
Foster City Zoning Code (§ 2) Medium relevance
Foster City Zoning Code (§ 2) Medium relevance
Foster City Zoning Code (§ 2) Medium relevance

Cited sections

Official Foster City code library

Frequently asked questions

What materials can I use for a permanent fence in Foster City?

Permanent fences and walls must use materials like redwood, cedar, brick, stone, stucco, cement, wrought iron or similar as allowed by the community development director; vinyl and chain‑link are generally prohibited for permanent fencing, except in limited commercial/industrial situations (§ 17.52.040).

How tall can a front‑yard fence be on an R-1 lot?

The baseline is 40 inches in the front yard. A 6‑foot fence in the front yard is only allowed under a set of exceptions (setback from sidewalk, 50% open materials, director approval and visible landscaped area consistency) — see § 17.52.010.

Do parking lots have to include trees and landscaping?

Yes — unenclosed off‑street parking must provide landscaping; typically 10% of the total parking area must be landscaped and at least one 15‑gallon tree per three parking stalls is required (trees may be clustered) — see Chapter 17.62 for details and planter sizing requirements.

Are hedges treated differently from fences?

Yes. Hedges in front yards are limited to 40 inches when planted parallel to the street; in other configurations hedges may reach 6 ft (with visibility/driveway rules applied). Hedges are also required to be maintained in a healthy condition (§ 17.52.010 and § 17.52.020).

What are the corner‑lot visibility requirements?

At most corner intersections (unless controlled by all‑way stop), no fence, wall or hedge over 40 inches is allowed within a 25‑foot vision triangle measured at the property lines — see § 17.52.030 and associated diagrams.

Can a PD (planned development) change landscaping or fence height rules?

Yes. The PD combining district allows the planning commission to waive or adjust many typical standards (including maximum fence heights and yard rules) when the PD is approved; consult the PD’s approved general development plan and § 17.36.020.

Do mechanicals and utility areas need landscape screening?

Yes. Utility and service areas visible from public rights-of-way must be screened to a height above equipment (typically 12 inches above max equipment height) using walls, louvered panels, or dense evergreen landscaping; rooftop equipment must be screened behind a parapet or matching enclosure (§ 17.62 and design standards).

Is a building or design review required for fences or screening?

If your fence exceeds certain heights on nonresidential properties or encloses commercial/industrial uses, architectural review by the planning commission can be required; even residential exceptions may require director review. See § 17.52.050 and the general design-review rules in the zoning chapters.

Are root protections and curbs required around parking lot trees?

Yes. Parking-lot trees and landscaping must be protected with concrete curbs; where trees are within 4 ft of sidewalks/curbs/streets, root barriers and trunk protectors are required (§ 17.62).

What if my proposed fence obstructs access to a utility or hydrant?

Fences, walls and hedges may not obstruct access to public utilities (street light poles, hydrants, meters, etc.); the city can remove obstructions if the owner refuses to comply — see § 17.52.060.

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