Belmont — Zoning

Last reviewed: July 1, 2026

Overview

Belmont’s zoning is codified in Title 17, the City of Belmont Zoning Ordinance, which divides the city into base districts and several combining/overlay districts with distinct land use and development standards. The official zoning map is the “Zoning Basemap,” maintained by the Zoning Administrator; district boundaries and any uncertainty are interpreted under Section 3 (e.g., centerlines of streets and lot-line rules). See the “Zoning Basemap” reference and boundary rules in Section 3.2–3.3 of the ordinance for formal map and interpretation direction.

Use this page together with the citywide Belmont zoning & planning overview, topic pages on Belmont Land Use and Belmont Development Standards, and cross-references to Belmont Parking, Belmont Design Review, Belmont Overlay Districts, Belmont Signage, Belmont Nonconforming Uses, Belmont Variances and Exceptions, Belmont Landscaping and Screening, and Belmont ADUs.

Zoning districts established (Title 17, Section 3.1)

Belmont’s ordinance establishes the following district classes: R-1E/R-1H/R-1A/R-1B/R-1C (single-family), R-2 (duplex), R-3/R-4/R-5 (multi-family), HRO-1/HRO-2/HRO-3 (Hillside Residential & Open Space), C-1/C-2/RC/C-4 (commercial), CMU (Corridor Mixed Use), E-1/E-2.1/E-2.2 (Executive Administrative), HIA-1/HIA-2 (Harbor Industrial Area prezoning), M (Limited Industrial) and M‑E (Exclusive Manufacturing), Special Combining Districts S-1/S-2/S-3, and civic and specific plan districts including SC, OS‑P, PS, VC, VSC, VCMU, VHDR, PF, PP, and the AUFO overlay. The “Zoning Basemap” is adopted by ordinance and updated by the Zoning Administrator for non-substantive cartographic corrections.

Below is a district‑by‑district snapshot of purposes, typical permitted uses, key dimensional standards, and where/applicability. Always verify parcel specifics on the Zoning Basemap and whether a site lies in a combining/overlay area (e.g., S‑districts, cannabis overlay, Downtown controls).

R-1E, R-1H, R-1A, R-1B, R-1C — Single-Family Residential

• Purpose: Single-family neighborhoods with slope- and lot-size-linked intensity controls.
• Common permitted uses: One dwelling per lot; accessory uses; see district sections for exceptions and ADUs. Not more than one primary dwelling; larger homes may trigger “larger residence” setbacks.
• Key standards:
  • Minimum lot sizes: R‑1E 1 acre, R‑1H 20,000 sf, R‑1A 9,600 sf, R‑1B 6,000 sf, R‑1C 5,000 sf. Minimum widths: R‑1E 150 ft, R‑1H 100 ft, R‑1A 70 ft, R‑1B 60 ft, R‑1C 50 ft.
  • Front setback: 25 ft in R‑1E/R‑1H; 15 ft on 50‑ft ROW or 20 ft on 40‑ft ROW in R‑1A/B/C; garages with perpendicular entry require 18 ft on‑site driveway depth.
  • Side setback: 10% lot width (min 6 ft, max 9 ft) in R‑1A/B/C/H; 15 ft in R‑1E; corner street side 15 ft in R‑1A/B/C and 25 ft in R‑1E.
  • Rear setback: 30 ft (R‑1E/R‑1H), 20 ft (R‑1A), 15 ft (R‑1B/C). Accessory buildings can be 5 ft from rear lot line.
  • Intensity: Single‑family GFA is the lesser of slope‑based FAR (Table 4; ranges about 0.533 down to 0.267 as slope increases) or lot size‑based GFA (Table 5), with a minimum 1,200 sf. Projects >3,500 sf GFA must meet larger‑home setbacks in Table 6.
• Where: Citywide established single‑family tracts; verify any S‑1 combining or hillside HRO adjacency.

R-2 — Duplex Residential

• Purpose: Duplex neighborhoods at modest intensity.
• Common permitted uses: Duplex dwellings; related residential uses.
• Key standards: Min lot 6,000 sf, min width 60 ft, min frontage 30 ft; FAR 0.6; height 2 stories or 35 ft; yards mirror R‑1C requirements. Design review applies to new work.
• Where: Scattered mid‑block corridors and near arterials; confirm on Basemap.

R-3 — Multi-Family Residential

• Purpose: Garden apartment and multi‑unit neighborhoods.
• Common permitted uses: Multi‑family dwellings; minimum density required on new vacant sites; supportive, transitional, farmworker housing; row dwellings; ADUs as accessory.
• Key standards: See district section for density, height and yards; CUP may be needed for certain care facilities.
• Where: Designated multi‑family areas per Basemap.

R-4, R-5 — Multi-Family Residential (higher density)

• Not found in retrieved materials beyond listing in Section 3.1. Verify with the jurisdiction.

HRO-1 — Hillside Residential & Open Space 1

• Purpose: San Juan Hills area; protect slopes and open space while allowing tailored single‑family development; clustering allowed with CUP.
• Common permitted uses: Single‑family with hillside protections; clustering by CUP to reduce grading and visual impact.
• Key standards: Max floor area 4,500 sf on ≥20,000 sf lots or clustered projects averaging ≥20,000 sf; otherwise 3,500 sf cap; HRO yard and height standards apply (see 4.7.5–4.7.6).
• Where: San Juan Hills Area Plan area.

HRO-2 — Hillside Residential & Open Space 2

• Purpose: Hillsides with slope‑calibrated floor area to limit bulk and grading.
• Common permitted uses: Single‑family with stricter floor area tied to average slope; density/floor area transfer tools by permit.
• Key standards: FAR varies with slope (e.g., 0.350 at 1–10% slope down to 0.096 at 28% per Table 2); absolute cap 3,500 sf; minimum allowed floor area at least 900–1,200 sf depending on slope. HRO yards: 15 ft front/rear, 7 ft sides; height 28 ft principal.
• Where: Western hillside tracts per Basemap.

HRO-3 — Hillside Residential & Open Space 3

• Purpose: Western Hills with options for clustering and townhouse formats by CUP; HRO standards apply unless modified by approval.
• Key standards: HRO yards and height as above; townhouse lot/setbacks via CUP.
• Where: Western Hills Area Plan vicinity; verify with the jurisdiction.

C-1 — Neighborhood Commercial

• Purpose: Neighborhood‑serving retail and services.
• Common permitted uses: Retail stores, personal services, and professional offices (upper floors); some ground‑floor office allowed when not displacing permitted retail.
• Key standards: Max height 28 ft; landscaping and design review apply by section cross‑reference.
• Where: Small centers along collectors/arterials.

C-2 — General Commercial

• Purpose: Community‑serving retail/services; some downtown‑specific regulations apply within the Downtown Specific Plan Area.
• Common permitted uses: All C‑1 permitted uses; additional retail, entertainment, conditional uses like theaters, auto sales, etc., per lists.
• Key standards: Max FAR 1.2; max height 28 ft; Downtown Specific Plan provisions add tailored use, site, and residential standards for downtown blocks (e.g., up to 30 du/ac, specific setbacks, and FAR 1.0 for residential portions inside the plan).
• Where: Commercial corridors and the Downtown Specific Plan Area.

RC — Regional Commercial

• Purpose: Community‑ and visitor‑serving retail/services, auto‑oriented commercial, some R&D/light industrial by allowance.
• Common permitted uses: Retail, restaurants, offices (conditions on ground floor size), personal services (smaller footprints), and others per §5.4.2.
• Key standards: See §5.4; additional conditions and parking standards apply by cross‑reference.
• Where: Larger commercial nodes per General Plan corridors.

C-4 — Service Commercial

• Purpose: Auto‑oriented and service commercial.
• Key standards: In the Downtown Plan Area, height 40 ft and FAR 0.5 (plus design, landscaping, and parking cross‑references).
• Where: Select service corridors including segments of El Camino and Ralston; confirm if Downtown overlays apply.

CMU — Corridor Mixed Use

• Purpose: El Camino Real parcels outside the Belmont Village Specific Plan; supports mixed retail, services, lodging, office, and high‑density residential, with a community benefits program for extra height/intensity.
• Common permitted uses: Broad commercial (banks, services, hotels), civic, and multi‑family above ground floor; ground‑floor multi‑family allowed subject to criteria or by‑right processing when state housing triggers apply; emergency shelters and low‑barrier navigation centers are listed.
• Key standards: No maximum residential density; max heights: 50 ft (up to 60 ft with community benefits), hotels 65 ft; setbacks generally none except 10 ft where abutting R‑1; min upper‑story step‑backs by abutting R‑1; min ground‑floor height 16 ft non‑res and 10 ft res; FAR: hotels 2.5 (additional FAR standards in §5A.1.6). Landscaping and design review apply.
• Where: El Camino Real corridor outside the Village Specific Plan.

E-1 — Executive Administrative

• Purpose: Low‑impact professional office and administrative environments.
• Common permitted uses: Professional offices, medical offices, limited labs, pharmacies within medical buildings; operations must be fully enclosed and non‑nuisance.
• Key standards: Min lot 7,200 sf, front 15 ft, side 6 ft (street side 7.5 ft corner), rear 10 ft; FAR 1.5; max height 2 stories/35 ft; design review required.
• Where: Executive/office enclaves citywide.

E-2.1/E-2.2 — Executive Administrative

• Purpose: Larger business/office campuses with tailored standards, including traffic/landscaping criteria for larger buildings.
• Common permitted uses: Administrative/executive offices, labs (R&D), medical offices; E‑2.2 allows limited warehousing support and small employee cafeterias; CUPs for certain utilities and clinics.
• Key standards: Min lot 10,000 sf; FAR 0.45; height 28 ft, 2 stories; yards: front 30 ft, side 10–15 ft depending on stories, rear 20 ft. Additional design criteria apply to projects over 5,000 sf.
• Where: Davis Drive/Cipriani/Continental/Alameda–Ralston subareas.

M (M‑1) — Limited Industrial and M‑E — Exclusive Manufacturing

• Purpose: Light industrial districts (M‑1) and specialized non‑nuisance manufacturing/research campuses (M‑E).
• Common permitted uses: M‑1 permits C‑4 service commercial uses, lumber/planing mills, warehouses, utilities, and light manufacturing; M‑E is tailored to large specialized manufacturing/admin/research with conditions of use.
• Key standards: Transitional yards when near R districts; height limited near R districts; design review and landscaping required; storage and nuisance controls apply.
• Where: Limited industrial corridors; verify adjacency buffers.

HIA-1/HIA-2 — Harbor Industrial Area (pre‑zoning; becomes effective upon annexation)

• Purpose: Prezoning for unincorporated areas within Belmont’s Sphere of Influence along the Harbor Industrial Area; HIA‑1 allows high‑density residential mixed with light industrial/retail/hotel/R&D; HIA‑2 allows light industrial/retail/hotel/R&D including large floorplate retail.
• Common permitted uses: HIA‑1 includes multi‑family, personal services in mixed use; HIA‑2 includes larger format retail and personal storage; both allow R&D, light manufacturing (indoors, no outdoor storage), restaurants, and utilities (minor).
• Key standards: FAR up to 5.0; height up to 65 ft with special abutting‑residential height plane controls; site dev standards: min lot 7,200 sf, width 60 ft; internal pedestrian connections; transitional yards per §9.7.5. [Design review] applies.
• Where: Sphere‑of‑influence Harbor Industrial Area; in effect only upon annexation.

PS — Public and Semi‑Public

• Purpose: Public/community facilities (e.g., parks, community centers, library, public schools, utilities).
• Common permitted uses: Community centers, cultural facilities, government buildings, parks; accessory uses necessary to primary use.
• Key standards: No min lot size/FAR; max height 45 ft (may exceed with Planning Commission findings); setbacks generally none, but must match abutting residential setbacks when adjacent; min 20% site landscaping; [parking] by §8.
• Where: Citywide public lands.

OS‑P — Open Space, Public

• Purpose: Preserve public open space for resource protection and passive recreation.
• Permitted uses: Parks, trails, passive recreation facilities, certain public buildings/utilities necessary for health/safety; [design review] for new public buildings. Max 28 ft and 2 stories.
• Where: Public open space reserves.

SC — Schools and Compatible Multiple Uses

• Purpose: Enable joint occupancy/compatible uses on or adjacent to school sites under state Education Code; requires School Utilization Plan and limits share of leased classroom space.
• Where: Designated school properties; verify approved utilization plan conditions.

VC, VSC, VCMU, VHDR — Village Districts

• Not found in retrieved materials beyond listing in Section 3.1; these implement the Belmont Village Specific Plan districts. Verify standards with the jurisdiction.

PF — Public Facility; PP — Park/Plaza; AUFO — Active Use Frontage Overlay

• Not found in retrieved materials beyond listing in Section 3.1. Verify with the jurisdiction.

Combining and overlay districts

S‑1 — Special Building Site Combining District (steep hillside frontage)

• Purpose: Special front yard/driveway rules and vegetation retention in steep hillsides.
• Key standards: Front yard 0 ft allowed if total distance from front of structure to back‑of‑curb is ≥23 ft; driveway length 0 ft on private property allowed with encroachment permit; garage doors near the setback must not project when opening/closing; [design review] applies.

S‑2 — Emergency Shelter Combining District

• District is established by Section 3.1 but detailed standards were not found in the retrieved materials. Verify with the jurisdiction.

S‑3 — Cannabis Retail & Distribution Overlay

• Purpose/where: Only along El Camino Real between O’Neill Ave and the San Carlos border; limits on number of cannabis businesses.
• Allowances: Up to two Cannabis Retail and one Distribution use with a use permit; spacing and performance standards (e.g., 600 ft from schools/other cannabis retailers; 100 ft from parks/active daycares; hours 9 a.m.–9 p.m.; no on‑site consumption).

Downtown Design Control District (D‑1; Section 22)

• Purpose: Architectural and streetscape guidance to maintain a cohesive downtown character and retail‑oriented ground floors; downtown‑specific guidelines control architecture, signing, and pedestrian environment.

Cross‑cutting standards that frequently matter

• Non-residential minimum parking rates are in §8; within ½‑mile of a major transit stop, minimums do not apply under AB 2097 unless specific findings are made (see §8 note).
• Most exterior work and new buildings are subject to design review (e.g., R‑1 §4.2.10, C‑districts, E‑districts, HIA).
• Signs are regulated separately; see Belmont Signage. Many zones defer to the Sign Ordinance.
• Transitional yards apply where commercial/industrial abuts residential (§9.7.5 cross‑referenced in several districts).
• If a site is nonconforming, expansion/rebuild is governed by Belmont Nonconforming Uses.

Snapshot table of decision‑relevant controls

Checklist

• Confirm your parcel’s base district and any combining/overlay on the Zoning Basemap (Title 17 §3.2) and whether Downtown or Village plan areas apply.
• Identify whether your use is permitted, conditionally permitted, or prohibited in your district (e.g., C‑1/C‑2/RC/C‑4, E‑1/E‑2, M/M‑E, HIA, HRO).
• Check dimensional controls: minimum lot area/width, setbacks, floor area ratio or caps, and height for your district; note hillside rules and any “larger residence” triggers in R‑1 and FAR by slope in HRO‑2.
• Verify parking requirements in §8 and whether AB 2097 transit proximity affects minimums.
• Determine if design review is required for exterior work/new buildings (applies widely across districts).
• If in S‑1 or S‑3, confirm special front yard/driveway or cannabis overlay limits; if in HIA, remember prezoning applies only upon annexation.
• If nonconforming, review nonconforming rules before expanding; seek variances only when standards cannot be met.
• Coordinate with related standards on landscaping and signage.

Risks & Ambiguities

Information Gaps

• Detailed standards for R‑4, R‑5, VC, VSC, VCMU, VHDR, PF, PP, and AUFO were not found in the retrieved materials. Verify with the jurisdiction.
• Full text for S‑2 Emergency Shelter Combining District not found in retrieved materials. Verify with the jurisdiction.

Plain-English Summary

Belmont assigns every parcel a zoning district that dictates what you can build and how big it can be. Single‑family areas use fixed setbacks and slope‑based floor‑area formulas; hillside HRO zones further limit size on steeper lots. Commercial and mixed‑use corridors (C‑1/C‑2/RC/C‑4/CMU) define what retail, office, and housing types can go where—and downtown rules can supersede base standards. Special overlays add rules in steep hillside frontages (S‑1) and cannabis areas (S‑3). Most projects need design review, and parking rules adjust for proximity to transit.

Source References

• Title 17 Section 3.1–3.4 (districts established; Zoning Basemap; boundary interpretation; conformity)
• R‑1 standards §4.2.3–4.2.6; GFA by slope/lot size (Tables 4–5); larger residence setbacks (Table 6)
• R‑2 standards §4.3.3–4.3.8 (site, FAR, height, yards)
• R‑3 standards §4.4.1–4.4.2 (permitted/conditional uses)
• HRO standards §4.7.4–4.7.7 (yards/height); HRO‑1 §4.7.10; HRO‑2 §4.7.11 (FAR table)
• C‑1 §5.2 (uses); §5.2.9 (height)
• C‑2 §5.3 (uses, FAR 1.2, height 28 ft; Downtown SP §§5.3.10–5.3.18)
• RC §5.4 (purpose/permitted uses)
• C‑4 §5.5 (Downtown SP controls incl. height 40 ft, FAR 0.5)
• CMU §5A.1 (purpose, permitted uses, heights 50/60/65 ft, no density max; site standards and FAR)
• E‑1 §5.6 (uses; FAR 1.5, 35 ft height; setbacks)
• E‑2.1/E‑2.2 §5.7 (uses; FAR 0.45, 28 ft height; yards; design criteria)
• M‑1 and M‑E §6 (uses, transitional yards, design/landscaping)
• HIA‑1 and HIA‑2 §5B (purpose, uses; FAR 5.0; 65 ft height; site/transitional/DR)
• PS §5C (purpose, uses; 45 ft height cap; setbacks; landscaping 20%)
• OS‑P §7B (purpose, uses; 28 ft/2‑story max; DR for public buildings)
• SC §7A (purpose, permitted; utilization plan; classroom space limits)
• S‑1 §21.2 (frontage/driveway/garage door rules; DR)
• S‑3 §21.4 (cannabis overlay geography, limits, spacing, hours)
• Downtown Design Control District §22 (purpose/policies)

Retrieved passages

• Belmont Zoning Code (Section 11) High relevance show source text
• Belmont Zoning Code (§10) High relevance show source text
• Belmont Zoning Code (section that) High relevance show source text
• Belmont Zoning Code (Section 4.7.3) High relevance show source text
• Belmont Zoning Code (§12) High relevance show source text
• Belmont Zoning Code (Section 12.4.) High relevance show source text
• Belmont Zoning Code (Section 12.4.) High relevance show source text
• Belmont Zoning Code (§29) High relevance show source text
• Belmont Zoning Code (Section 4.7.9) High relevance show source text
• Belmont Zoning Code (section 9.6.3) High relevance show source text
• Belmont Zoning Code (Section 5.3.15) High relevance show source text
• Belmont Zoning Code (section of) High relevance show source text
• Belmont Zoning Code (Section 24) High relevance show source text
• Belmont Zoning Code (Section 13.) High relevance show source text
• Belmont Zoning Code (Section 13) High relevance show source text
• Belmont Zoning Code (Section 8.) High relevance show source text
• Belmont Zoning Code (Section 9.7.5) High relevance show source text
• Belmont Zoning Code (Section shall) High relevance show source text
• Belmont Zoning Code (Section 9) High relevance show source text
• Belmont Zoning Code (§4) High relevance show source text
• Belmont Zoning Code (§31) High relevance show source text
• Belmont Zoning Code (SECTION 5C) High relevance show source text

Cited sections

• Title 17 Section 3.1–3.4 (districts established; Zoning Basemap; boundary interpretation; conformity) (Title 17)
• R‑1 standards §4.2.3–4.2.6; GFA by slope/lot size (Tables 4–5); larger residence setbacks (Table 6) (§4.2.3)
• R‑2 standards §4.3.3–4.3.8 (site, FAR, height, yards) (§4.3.3)
• R‑3 standards §4.4.1–4.4.2 (permitted/conditional uses) (§4.4.1)
• HRO standards §4.7.4–4.7.7 (yards/height); HRO‑1 §4.7.10; HRO‑2 §4.7.11 (FAR table) (§4.7.4)
• C‑1 §5.2 (uses); §5.2.9 (height) (§5.2)
• C‑2 §5.3 (uses, **FAR 1.2**, height 28 ft; Downtown SP §§5.3.10–5.3.18) (§5.3)
• RC §5.4 (purpose/permitted uses) (§5.4)
• C‑4 §5.5 (Downtown SP controls incl. **height 40 ft**, **FAR 0.5**) (§5.5)
• CMU §5A.1 (purpose, permitted uses, **heights 50/60/65 ft**, no density max; site standards and FAR) (§5A.1)
• E‑1 §5.6 (uses; **FAR 1.5**, **35 ft** height; setbacks) (§5.6)
• E‑2.1/E‑2.2 §5.7 (uses; **FAR 0.45**, **28 ft** height; yards; design criteria) (§5.7)
• M‑1 and M‑E §6 (uses, transitional yards, design/landscaping) (§6)
• HIA‑1 and HIA‑2 §5B (purpose, uses; **FAR 5.0**; **65 ft** height; site/transitional/DR) (§5B)
• PS §5C (purpose, uses; **45 ft** height cap; setbacks; landscaping 20%) (§5C)
• OS‑P §7B (purpose, uses; **28 ft/2‑story** max; DR for public buildings) (§7B)
• SC §7A (purpose, permitted; utilization plan; classroom space limits) (§7A)
• S‑1 §21.2 (frontage/driveway/garage door rules; DR) (§21.2)
• S‑3 §21.4 (cannabis overlay geography, limits, spacing, hours) (§21.4)
• Downtown Design Control District §22 (purpose/policies) (§22)
• Belmont_ZoningCode.md

• Official Belmont code library