Local zoning · Larkspur

Larkspur — Land Use

Land Use under the Larkspur local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page explains what Larkspur’s local zoning ordinance (Title 18) actually allows and restricts for land use in each zoning district. It summarizes the district purpose, the typical permitted uses and conditional uses, and the most decision-relevant dimensional/quantitative limits that the ordinance itself states. Whenever the ordinance text in the uploaded materials does not supply a specific numeric standard, I flag that as "Not found in retrieved materials" so you can Verify with the jurisdiction.

For dimensional tables and standards see the city's Larkspur Development Standards. For parking rules referenced below consult the Larkspur Parking page. Projects often trigger Larkspur Design Review and may overlap with Larkspur Overlay Districts. Accessory units must follow the local ADU chapter and state law; see Larkspur ADUs and the California Building Standards Code for building-safety rules.

District-by-district breakdown (what the zoning ordinance itself says)

Note: every district entry below is anchored to the ordinance section cited (the § glyph + number) and a search-result citation for the uploaded code text.

R-1 First Residential

  • Purpose: Provide for single-family neighborhoods and implement General Plan policies applicable to low-density areas. See § 18.20.005 (purpose references) and the regulations established in § 18.20.010.
  • Typical permitted uses: one-family dwellings, accessory structures and uses (including home occupations), public parks/playgrounds, group homes, transitional and supportive housing, residential care facilities, ADUs/JADUs (subject to Ch. § 18.23). See § 18.20.020.
  • Conditional uses (need a use permit): churches, schools, community clubhouses, public utility buildings, day care centers, mobilehome parks in some situations, and small bed-and-breakfasts (limited) per § 18.20.025.
  • Key dimensional standards: the R‑1 chapter references the district-specific rules and Chapter § 18.16 for general regulations; explicit numeric front/side/rear yard and height numbers were Not found in retrieved materials in the R‑1 text snippets (verify with the jurisdiction).

R-2 Second Residential

  • Purpose: Medium-density residential neighborhoods. See § 18.28.005–.010.
  • Typical permitted uses: one- and two-family dwellings, accessory buildings, parks, group homes, transitional/supportive housing, family day care homes, ADUs/JADUs (see § 18.28.020 and Ch. § 18.23).
  • Conditional uses: churches, schools, community clubhouses, mobilehome parks, public utility uses, day care centers, and limited bed-and-breakfasts, see § 18.28.023.
  • Key dimensional standards: the chapter lists sections for lot area, height, percentage lot coverage, and yards (e.g., § 18.28.030–.070) but explicit numeric values are not present in the retrieved snippets — Not found in retrieved materials; verify with the jurisdiction and the Larkspur Development Standards.

R-MP / MHP Mobile Home Park District

  • Purpose: Regulate mobile-home parks and related uses; ensure park design, landscaping and safety. See § 18.30.010 purpose language.
  • Typical permitted uses: mobile home parks, accessory uses, an owner/operator dwelling, recreational facilities, group homes, transitional/supportive housing, family day care homes, and ADUs/JADUs per § 18.30.040.
  • Conditional uses: recreational vehicle parks, public utility uses, small commercial/service uses accessory to a park, day care centers; see § 18.30.050.
  • Key dimensional/operational standards: minimum park size, building/mobile-home height limits (e.g., one story or 14 ft), landscaping and density rules are specified in § 18.30.060 (see that section for specifics).

RMP Residential Multiple-Property (Planned) District

  • Purpose: Allow multiple-family residential developments with densities set by numeric designations appended to the district; follow Chapter 18.36.
  • Typical permitted uses: one-, two-, multiple-family dwellings, accessory uses, parks, home occupations, group homes, transitional/supportive housing, residential care facilities, ADUs/JADUs (see § 18.36.030).
  • Conditional uses: day care centers, churches, colleges/schools, community clubhouses, public utilities, mobilehome parks and other uses found consistent by Planning Commission, see § 18.36.040.
  • Key dimensional standards: unit density is set by the appended numeric designation; other standards defer to the most-similar district and may be modified by the Planning Commission (§ 18.36.050–.060).

SD Storefront Downtown (historic core)

  • Purpose: Preserve pedestrian-scale downtown character and the historic district; focus on mixed commercial/residential uses. See § 18.41.010.
  • Typical permitted uses: retail, restaurants (small outdoor seating allowed), multifamily housing, hotel/inn, community meeting facilities, offices (retail-service character in prime locations), banks, movie theater, mixed‑use buildings, group homes, residential care, ADUs/JADUs (see § 18.41.020).
  • Conditional uses: schools, noise-generating instructional services, live entertainment, outdoor seating over ten seats, and other uses listed in § 18.41.030.
  • Key standards: design review and historic preservation rules are invoked in this chapter (see references to design review and Heritage Preservation Board review in the SD chapter). Parking and circulation requirements are addressed by cross-references (e.g., off-street parking in § 18.41.150).

GD Garden Downtown (lower intensity downtown)

  • Purpose: Continue nonintensive mixed-use with landscaping prominence and larger lots — garden atmosphere. See § 18.43.010 intent.
  • Typical permitted uses: broad retail and restaurant uses (with limited outdoor seating), multifamily residential, hotel/inn, offices, community facilities, church, movie theater, mixed-use, group homes, and ADUs/JADUs — see § 18.43.020.
  • Conditional uses: similar categories to SD (schools, instructional services with noise potential, recreation, pet-related businesses, outdoor seating beyond limits), see § 18.43.030.
  • Key standards: the chapter includes floor area ratio and design-review triggers; higher FAR (0.21–0.50) requires a use permit with findings (see conditional uses language).

C-1 Restricted Commercial

  • Purpose & cross-reference: C-1 imports all uses allowed in the A-P district (Administrative-Professional) except those that are subject to use permits and emergency shelters; retail list supplied. See § 18.44.010–.020.
  • Typical permitted uses: a long list of small retail/service businesses (bakeries, barber/beauty, bookstores, drugstores, clothing, florists, food stores, etc.) and restaurants (no drive-in), with the usual accessory uses and ADUs where associated with dwelling units. See § 18.44.020 for the itemized list.
  • Conditional uses: those enumerated in the district (town-specific list) — see § 18.44.030 and the chapter index lines.

C-2 Commercial District

  • Purpose: General commercial activities compatible with community needs. See § 18.48.010.
  • Typical permitted uses: stores and shops listed in § 18.44.020(B), offices, public service uses, and residential-associated group homes, transitional/supportive housing, family day care homes, and ADUs/JADUs associated with residential units per § 18.48.020.
  • Conditional uses: listed in § 18.48.022 (see chapter).
  • Key standards: the chapter includes sections for FAR, lot coverage, yards and height references (see § 18.48.055, .050, etc.) — specific numbers were not retrievable in the snippets shown (verify with the jurisdiction).

OS Open Space District

  • Purpose: Preserve open space, habitat, ridgelines, marshlands; provide for passive/active recreation and limit hazardous lands. See § 18.49.010.
  • Typical permitted uses: public parks/recreation/open space, ridgeline preservation, habitat areas, trails and public access, areas of historic/cultural value, water bodies, and group homes / transitional/supportive housing and ADUs/JADUs per § 18.49.020 (some residential/supportive housing language reflects recent ordinance updates).
  • Conditional uses: parking lots, structures (shelters, restrooms), development of new trails, roadways, utility lines, grading/dredging/filling — permitted only with a use permit and findings in § 18.49.030.
  • Key numeric standard: maximum FAR = 0.10 in the OS District per § 18.49.040 (exceptions possible by Planning Commission findings).

Educational / Environmental Resource District (Marin Community College lands) — EER

  • Purpose: Conserve college lands for education, protect wetlands/floodplains, and prevent additional structures. See § 18.37.005–.010.
  • Permitted uses: outdoor athletics, horticultural education, floodplain/wildlife habitat, and limited nursery/garden supply sales (with restrictions) — see § 18.37.010.
  • Prohibited/strict limits: no additional structures except college classrooms authorized by state law; no commercial/professional uses, roadways, transit lines, above-ground utilities, grading or additional parking — see § 18.37.015.

Tidal-Residential / T-R (waterfront neighborhood)

  • Purpose: Special rules for tidal/waterfront single-family areas; lower heights and special coverage rules. See § 18.22.005 et seq.
  • Typical permitted uses: single-family dwellings, accessory structures, ADUs/JADUs, and some public uses per § 18.22.020–.030.
  • Key numeric standards (explicit in the ordinance): maximum height = 15 ft and one story (§ 18.22.040); maximum lot coverage = 40% or 3,500 sq ft whichever is more restrictive (§ 18.22.050); front/side/rear yard dimensions explicitly set in § 18.22.060 (front 20 ft, side 6 ft or 5 ft where lot width < 60 ft, rear 6 ft).

Hillside and Slope / Special Site Standards (Chapter 18.34)

  • Purpose: More restrictive rules on slopes ≥ 10% to preserve natural features, minimize grading, and protect views. See Chapter § 18.34 and § 18.34.020 definitions.
  • Applicability: Applies where hillside slopes meet the defined thresholds; it cross-references residential floor area rules and preservation of permeable areas. Specific thresholds and preservation rules are in § 18.34.020 and related subsections.

Quick reference table — most decision-relevant permitted uses / numeric items

District Typical permitted uses (decision-relevant) Key numeric limits (where stated) Code Reference
R-1 One-family dwellings; group homes; ADUs/JADUs Numeric setbacks/height Not found in retrieved materials (see Ch. § 18.16) § 18.20.020, § 18.20.025
R-2 One-/two-family dwellings; ADUs/JADUs; transitional housing Numeric standards listed by sub‑sections but numbers Not found in retrieved snippets § 18.28.020, § 18.28.023
RMP Multi-family, condominiums, ADUs Density set by numeric designation; other standards defer to similar district § 18.36.050–.060 § 18.36.030–.060
MHP Mobile home parks, accessory uses Height ≤ 14 ft (one story); min park area 2 acres (see § 18.30.060) § 18.30.040–.060
SD Downtown retail, restaurants, multifamily, mixed-use Off-street parking cross‑refs (see § 18.41.150); design/historic review referenced § 18.41.020–.030
GD Garden Downtown retail, multifamily, mixed-use FAR 0.21–0.50 needs use permit with findings; see conditional-use text § 18.43.020–.030
C-1 / C-2 Retail/service businesses, offices, public uses Chapter lists sections for yards, height, FAR (numbers Not found in snippets) § 18.44.020, § 18.48.020
OS Parks, habitat protection, trails; limited residential/supportive housing references FAR = 0.10 (max) in § 18.49.040; conditional uses require use permit § 18.49.030 § 18.49.020–.040
EER Outdoor education and habitat; most new structures prohibited Strict prohibitions on new structures/parking/grading — see § 18.37.015 § 18.37.010–.015
T-R Waterfront single-family use Height 15 ft; lot coverage 40% or 3,500 sq ft; front yard 20 ft, side 6 ft (or 5 ft if lot <60 ft), rear 6 ft — § 18.22.040–.060 § 18.22.040–.060

Checklist (what an applicant must satisfy for a permitted or conditional use)

  • Confirm the property’s exact zoning designation on the city zoning map and applicable overlays; if within a slope/hillside area, read Chapter § 18.34.
  • Verify that the proposed use is listed as a permitted use in the applicable district (e.g., § 18.20.020 for R‑1, § 18.28.020 for R‑2).
  • If the use is listed as a conditional use, prepare for a use permit and the required findings per Chapter § 18.76 and the district’s conditional‑use subsection (e.g., § 18.49.030 for OS).
  • Confirm applicable dimensional standards (height, yard setbacks, lot coverage, FAR) from the district chapter and the city’s Larkspur Development Standards. If not in the chapter, state “Not found in retrieved materials” and Verify with the jurisdiction.
  • Determine required parking using the city’s parking rules and any district off-street parking section (see § 18.41.150, § 18.48.100, and Chapter § 18.56 references). Consult the Larkspur Parking page.
  • Assess whether the project triggers Larkspur Design Review or Heritage Preservation Board review (many district chapters include design-review references such as § 18.28.085, § 18.44.085).
  • For ADUs/JADUs, follow Chapter § 18.23 and state ADU laws where noted; consider local ADU-specific limits in the chapter. See Larkspur ADUs.
  • Check overlay district rules (e.g., hillside, historic) that may add restrictions — see Larkspur Overlay Districts and Chapter § 18.34.

Risks & Ambiguities

Issue Why it matters What to verify
District numeric standards missing from retrieved snippets (setbacks, coverage, heights for some districts) You cannot calculate lot yield, allowable additions, or ADU feasibility without exact numbers Verify district‑specific numeric standards in the full municipal code or [Larkspur Development Standards]; many district chapters list section numbers but the snippet did not include the numeric values (Verify with the jurisdiction).
Parking requirement variability Off-street parking rules are referenced in multiple district chapters but the actual per‑use ratios can be in a different chapter (Chapter § 18.56) Check § 18.56 and district off-street parking subsections (e.g., § 18.41.150, § 18.48.100) and the Larkspur Parking page.
Overlap with overlays (hillside, historic) Overlays can reduce allowable FAR, require special findings, or prohibit uses entirely (e.g., the EER district prohibits most new structures) Confirm overlay boundaries on the zoning map and read overlay chapters (e.g., Chapter § 18.34, § 18.37.015).
“Permitted” vs. “by right” for supportive housing State law requires some permanent supportive housing to be allowed by right where objective standards apply; Larkspur text references Government Code compliance For developments claiming state law “by right” status, verify the project's compliance with the objective standards referenced in the district (see the persistent ordinance note that permanent supportive housing is allowed in certain zones) and consult California housing laws.
Site-specific findings for use permits Conditional uses require findings about consistency with General Plan and neighborhood impacts (e.g., § 18.49.030(B)) Prepare findings showing GP consistency, necessity, and absence of detriment; confirm exact findings in the district’s conditional‑use subsection.

Plain-English Summary

Larkspur’s Title 18 divides the city into many named districts (for example R-1, R-2, SD, GD, C-1, C-2, OS, MHP, RMP, and special Educational/Environmental and Hillside chapters). Each district’s chapter lists what is a permitted use and what requires a use permit; several chapters explicitly allow ADUs/JADUs subject to Chapter § 18.23. Numeric rules (height, yards, lot coverage, FAR) are sometimes called out (for example OS: FAR = 0.10, T-R: height 15 ft, coverage 40%/3,500 sq ft) and other numeric values must be confirmed in the full code or the city’s development‑standards tables. Always verify parking (Chapter § 18.56 and district off-street parking subsections) and whether design review or overlay rules apply.

Information Gaps

  • Full numeric development standards (front/side/rear setbacks, maximum building heights, and percentage lot coverage) for many districts were referenced by section headers but not present in the retrieved snippets — Verify with the full municipal code or Larkspur Development Standards.
  • The exact per‑use off‑street parking ratios (Chapter § 18.56) were not provided in the retrieved snippets — check the city’s parking chapter and Larkspur Parking.
  • The city zoning map (to identify where each district applies to a particular parcel) was not included in the uploaded materials — Verify parcel zoning with the city’s planning counter or online zoning map. Not found in retrieved materials.
  • Full text of Chapter § 18.76 (the procedural findings for use permits) was referenced but its full content was not included in the snippets — consult the full municipal code.

Source References

  • Larkspur Municipal Code, Title 18 (zoning) — R‑1 First Residential, § 18.20.020 (Permitted Uses) and § 18.20.025 (Conditional Uses)
  • R‑2 Second Residential, § 18.28.020 and § 18.28.023 (Permitted/Conditional Uses)
  • Mobile Home Park (MHP), § 18.30.040–.060 (uses and standards)
  • RMP district, § 18.36.030–.060 (uses, density, standards)
  • Storefront Downtown (SD), § 18.41.010–.030 (intent and permitted uses)
  • Garden Downtown (GD), § 18.43.020–.030 (permitted/conditional uses)
  • C‑1 Restricted Commercial, § 18.44.020 (permitted retail list)
  • C‑2 Commercial, § 18.48.020 (permitted uses)
  • Open Space (OS), § 18.49.010–.040 (purpose, permitted/conditional uses, FAR = 0.10)
  • Educational/Environmental Resource District, § 18.37.005–.015 (permitted uses and prohibitions)
  • Tidal‑Residential (T‑R), § 18.22.030–.060 (lot area, height 15 ft, coverage rules, yards)
  • Hillside/Slope standards, Chapter § 18.34 (purpose and definitions)
  • ADUs: Larkspur Municipal Code Chapter § 18.23 (referenced throughout district permitted use lists)

Sources

Retrieved passages

  • Larkspur Zoning Code (§ 2) High relevance
  • Larkspur Zoning Code (Chapter 18.23.) High relevance
  • Larkspur Zoning Code (Section 65651) High relevance
  • Larkspur Zoning Code (Chapter 18.23.) High relevance
  • Larkspur Zoning Code (Title 18) High relevance
  • Larkspur Zoning Code (Section 18.20.005.) High relevance
  • Larkspur Zoning Code (Title 18) High relevance
  • Larkspur Zoning Code (Chapter 18.23) High relevance

Cited sections

Frequently asked questions

What can I build on an R-1 lot in Larkspur?

In R‑1 the ordinance permits one‑family dwellings, accessory structures, group homes, transitional/supportive housing, residential care facilities, and ADUs/JADUs subject to Chapter § 18.23; other uses like churches or day care require a use permit under § 18.20.025. Check exact dimensional limits in the full code or the Larkspur Development Standards.

What are Larkspur setback requirements?

Setback requirements are stated inside district chapters (e.g., T‑R front yard 20 ft, side 6 ft or 5 ft if narrow, rear 6 ft in § 18.22.060). Many other districts reference yards sections (for example § 18.28.060 in R‑2) but the numeric values for those districts were Not found in retrieved materials — Verify with the jurisdiction or the Larkspur Development Standards.

Do I need a use permit to run a small restaurant in downtown Larkspur?

Restaurants are permitted in downtown districts (SD/GD) as listed in § 18.41.020 and § 18.43.020; however outdoor seating beyond the incidental limits (more than ten seats) or amplified live entertainment may require a use permit under the district conditional-use subsections (see § 18.41.030, § 18.43.030). Also check parking and design-review triggers.

Where is the Open Space (OS) district used and what is allowed?

The OS district is intended to preserve natural/open spaces, ridgelines, marshlands, and provide parks/trails; permitted uses include public parks, habitat preservation, trails and similar uses per § 18.49.020, while parking lots, structures, roads, utilities and grading are conditional and require a use permit with findings in § 18.49.030. Maximum FAR = 0.10 is stated in § 18.49.040.

Are ADUs allowed everywhere in Larkspur?

Many district chapters explicitly allow ADUs and JADUs subject to Larkspur’s ADU chapter (§ 18.23) — they are listed in R‑1, R‑2, RMP, SD, GD, C‑1/C‑2 where associated with residential units, and MHP rules reference ADUs for park owners — see each district’s permitted-use subsection and Chapter § 18.23. Verify specific ADU dimensional/parking exceptions in the ADU chapter and applicable state ADU law.

How does the hillside/steep-slope overlay affect allowed uses?

Hillside areas (average slope ≥ 10%) are subject to Chapter § 18.34, which places more restrictive development rules to preserve natural features, minimize grading, and limit density and building scale. If your parcel is within the hillside overlay, additional requirements and possibly restrictions on new construction apply — check Chapter § 18.34 and the zoning map.

Where do I find parking requirements for a proposed commercial use?

District chapters refer to off‑street parking sections (for example § 18.41.150 in SD, § 18.48.100 in C‑2) and the general parking rules are organized under Chapter § 18.56 (see the city’s parking rules). Consult those sections and the Larkspur Parking page to compute required stalls.

Do downtown projects require design review?

Yes — downtown districts (SD and GD) and many commercial/residential chapters include a design review and Heritage Preservation Board review step (see chapter headings and specific references such as § 18.41.085, § 18.43.085, and district design‑review subsections). Consult the Larkspur Design Review page for the procedural details.

Is permanent supportive housing treated differently?

The municipal code includes language that permanent supportive housing compliant with Government Code § 65651 is allowed by right when objective development standards apply to the zone; this appears in multiple district texts (see references in chapters such as R‑2 and others). Verify project-specific eligibility against the objective standards listed where cited.

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