Inyo County — Development Standards

Last reviewed: July 6, 2026

Overview

This page distills the objective development standards that apply in the unincorporated areas of Inyo County under Title 18 (Zoning) of the County Code. It covers district-by-district rules for setbacks, height, minimum lot size, floor area ratio (FAR), and residential density, along with countywide standards for accessory structures and fences. For land use context, see the county’s zoning and land use pages.

Most projects must meet the objective setbacks, heights, and lot/area rules of their zoning district; where a state housing law like SB 9 would be physically precluded, Inyo County must waive or reduce local standards just enough to allow the units to be built (§ 18.84.030(D)(1)–(3) ).

How the code is organized

• Title 18 (Zoning) contains the district-specific standards (R, C, M, etc.), plus countywide “General Regulations” that apply across districts (§ 18.78.010 ).
• Commercial and industrial districts often express intensity using an allowable FAR keyed to the site’s General Plan designation (e.g., Retail Commercial, Heavy Commercial/Commercial Service, Light/General Industrial) (§ 18.48.090; § 18.49.050(I); § 18.57.120; § 18.56.050(I) ).
• Some districts allow residential uses (and set residential density ranges) even though they are primarily commercial or office districts (§ 18.48.100; § 18.51.050(I) ).

District-by-district standards (unincorporated areas)

R-1 — One-Family Residences

• Purpose and typical uses: Protect and expand single-family neighborhoods; one single-family dwelling (including single-family mobilehome) is a principal permitted use (§ 18.30.010; § 18.30.030 ).
• Key dimensional standards:
  • Minimum lot area/width: 5,800 sf and 50 ft (§ 18.30.060 ).
  • Setbacks: Front 25 ft, rear 20 ft, side 5 ft (street side on corner lots also 5 ft) (§ 18.30.070 ).
  • Height: Dwellings max 2.5 stories/35 ft; accessory buildings max 20 ft (§ 18.30.080 ).
  • Parking: 2 spaces per dwelling (§ 18.30.110 ; see also parking).
  • Rear-yard expansion: Existing dwellings may extend into at most 30% of the required rear yard if all other limits are met (§ 18.30.100 ).
• Where it applies: Any parcel zoned R-1 in the unincorporated areas; confirm on the County zoning map (Verify with the jurisdiction).

R-2 — Multiple Residential (medium-density)

• Purpose and typical uses: Duplexes, two single-family dwellings, and related residential (§ 18.33.010; § 18.33.020 ).
• Key dimensional standards:
  • Minimum lot area/width: 6,500 sf and 50 ft (§ 18.33.090 ).
  • Setbacks: Front 25 ft, rear 20 ft, side 5 ft (§ 18.33.050 ).
  • Height: Max 3 stories/40 ft (§ 18.33.060 ).
  • Parking: 2 spaces per dwelling (§ 18.33.080 ).
• Where it applies: Any parcel zoned R-2 in the unincorporated areas (Verify with the jurisdiction).

R-3 — Multiple Residential (higher-density)

• Purpose and typical uses: Apartments, townhouses, SROs; the number of units is determined by the General Plan (§ 18.34.010; § 18.34.020 ).
• Key dimensional standards (§ 18.34.050):
  • Height: Principal 3 stories/40 ft; accessory 2 stories/25 ft.
  • Minimum parcel: 10,000 sf; width 75 ft.
  • Setbacks: Front 15 ft (but 25 ft if abutting R-1 or R-2 unless adjacent property is itself nonconforming); rear 15 ft (accessory may be 0 ft); side 5 ft per story (accessory 0 ft but 5 ft on one side).
  • Separation: 10 ft between buildings.
  • Parking: 2 spaces/unit + 1 guest space/4 units (§ 18.34.050 ).
• Where it applies: Any parcel zoned R-3 in the unincorporated areas (Verify with the jurisdiction).

RR (0.5-acre) — Starlite Estates (Rural Residential, specific)

• Purpose and typical uses: Rural residential neighborhood with large lots (zone-specific).
• Key dimensional standards: Height (principal 2.5 stories/30 ft, accessory 2 stories/25 ft), minimum parcel 0.5 acre, width 100 ft, setbacks front 25 ft, rear 25 ft, side 5 ft, building separation 10 ft, parking 2 spaces/dwelling (§ 18.22.050 ).
• Where it applies: Parcels mapped as RR 0.5 acre—Starlite Estates in the unincorporated areas (verify zoning).

C-1 — Neighborhood Commercial

• Purpose and typical uses: Local retail/service; residential accessory unit within a business building may be allowed with limitations (§ 18.45.040(A) ).
• Key dimensional standards:
  • Yards: No minimum unless abutting an R parcel, then 20 ft (§ 18.45.060 ).
  • Height: 40 ft/3 stories; within 50 ft of an R district: 20 ft (§ 18.45.070 ).
  • Minimum site: 10,000 sf, width 75 ft (§ 18.45.080 ).
  • Parking: 1/400 sf usable floor area or as determined by the Planning Director (§ 18.45.050 ).
  • FAR: Not found in retrieved materials.
• Where it applies: Parcels zoned C-1 in the unincorporated areas.

C-2 — Highway Service and Tourist Commercial

• Key dimensional standards:
  • Setbacks: Front 25 ft; rear 0 ft (but 20 ft if adjacent to R); side 0 ft (§ 18.48.050 ).
  • Height: 40 ft/3 stories, or 20 ft within 50 ft of an R district (§ 18.48.060 ).
  • Minimum site: 10,000 sf, width 75 ft (§ 18.48.070 ).
  • Parking: 1/300 sf (§ 18.48.080 ).
  • FAR (if GP = Retail Commercial): 0.40 by right; up to 0.60 with CUP (§ 18.48.090 ).
  • Residential density: 7.6–24 du/ac (§ 18.48.100 ).

C-3 — Administrative and Professional Offices

• Key dimensional standards: Height 3 stories/40 ft; minimum parcel 7,500 sf, width 60 ft; yards none (but side yard must meet abutting R zone’s requirement when abutting R); separation 10 ft; parking 1/200 sf; residential density 7.6–24 du/ac (§ 18.51.050 ).

C-4 — Heavy Commercial

• Purpose: Wholesale, storage, yards, shops, SROs (§ 18.49.010–.020 ).
• Key dimensional standards: Height 3 stories/40 ft; minimum parcel 10,000 sf, width 50 ft; front 0 ft; rear 0 ft (but 20 ft if adjacent R); side 0 ft (but 5 ft/story if adjacent R); separation 10 ft; parking 1 per employee plus customer/residential as determined; FAR tied to GP (HC/CS: 0.4 up to 1.0 with CUP; LI/GI: 0.5 up to 1.2 with CUP); residential density 7.6–24 du/ac (§ 18.49.050 ).

C-5 — Commercial Recreation

• Purpose: Resorts, lodges, campgrounds, tourist-oriented services (§ 18.54.010–.020 ).
• Key dimensional standards: Height 2.5 stories/30 ft; minimum parcel 5 acres, width 350 ft; setbacks front 25 ft, rear 20 ft, side 20 ft; separation 10 ft; parking by use; base residential density up to 1 du/2.5 acres, with clustering up to 24 du/net acre (§ 18.54.050 ).

M-1 — General Industrial and Extractive

• Key dimensional standards: Setbacks front 25 ft, rear 15 ft, side 10 ft; within 500 ft of an R or C district boundary: max 35 ft/2.5 stories; otherwise over 40 ft/2.5 stories requires Planning Commission approval; minimum site 20,000 sf, width 100 ft; parking 1 per full-time employee plus guest/loading; FAR by GP (HC/CS: 0.4 up to 1.0 with CUP; LI/GI: 0.5 up to 1.2 with CUP) (§ 18.57.090–.120 ).

M-2 — Light Industrial

• Key dimensional standards: Height 3 stories/40 ft (principal), 2 stories/25 ft (accessory); minimum parcel 0.5 acre, width 75 ft; front 0 ft (25 ft for mobilehome), rear 0 ft (10 ft if adjacent to R and for mobilehome), side 0 ft (5 ft/story if adjacent to R and for mobilehome); separation 10 ft; parking 1 per full-time employee plus customer/loading; FAR by GP same as M-1 (§ 18.56.050 ).

Countywide, cross-district development rules (apply in unincorporated areas)

• Yards and height exceptions:
  • General yard provisions apply across districts (§ 18.78.060–.110 ).
  • Height exceptions for features like chimneys and spires (§ 18.78.040 ).
• Accessory buildings:
  • Min separation to any building 10 ft; min setback from rear/side 5 ft; max height 20 ft unless the specific district allows more; not allowed in required front yard; in R-1 and RMH, may not be placed in front of the primary structure (§ 18.78.150(A)–(D) ).
• Fences/walls/hedges:
  • Generally up to 6 ft; within required front yard and certain corner-lot areas: max 3.5 ft; additional measurement/exception rules apply (§ 18.78.160–.180 ).
• Signs:
  • Signs must comply with Chapter 18.75; many districts cross-reference sign compliance (e.g., R-1 accessory uses; C-1/C-2 accessory uses) (§ 18.30.050(F); § 18.45.040(C); § 18.48.040(C) ). See also signage.
• SB 9 Two-Unit Development (select R-1/RR/OS areas in Bishop urbanized area only):
  • County must modify/waive standards that would physically preclude up to two primary units of at least 800 sf each; rear/side setbacks may be 5 ft (or 4 ft if needed to fit two 800-sf units); front setback may be reduced to 10 ft; one off-street parking space per SB 9 unit unless within ½ mile of qualifying transit or near car-share (§ 18.84.010; § 18.84.030(D), (F) ). For broader state context, see California housing laws.
• Density Bonus Overlay (DB):
  • State Density Bonus Law is adopted by reference; applicants may seek incentives/concessions and waivers of development standards when necessary to realize the allowed density; deed restrictions and related procedures apply (§ 18.65.010–.020; § 18.65.070; related application content referencing Gov. Code 65915 ).
• SAHO — Snow Avalanche Hazard Overlay:
  • Underlying district standards apply, with an added prohibition on deflective/redirective avalanche works that increase danger to others (§ 18.64.030; § 18.64.050 ). See overlay districts.

Note: This page addresses zoning/development standards only. Separate design review processes may apply. Building safety is governed by the California Building Standards Code.

Quick-reference standards table (selected districts)

Practical notes and comparisons

• Setbacks are smallest in the commercial/industrial districts (often 0 ft), but increase when abutting or near a residential district; watch the “adjacency triggers” (e.g., C-2 rear yard 20 ft if adjacent to R; C-1 20 ft yard if abutting R; M-1 height step-down near R/C) (§ 18.48.050; § 18.45.060; § 18.57.100 ).
• FAR is not universal; it’s stated for several C and M districts and depends on the parcel’s General Plan land use designation, with higher FAR possible via conditional use permit (§ 18.48.090; § 18.49.050(I); § 18.57.120; § 18.56.050(I) ). The Code also defines FAR countywide (§ 18.06.236 ).
• Accessory structures have their own countywide setbacks and separation rules—these can be more restrictive than the base district (e.g., min 10 ft to any building, 5 ft to side/rear) (§ 18.78.150 ).
• Many districts embed specific parking ratios that override a single countywide table (e.g., R-1 2 spaces/unit; C-2 1/300 sf; M-1 1/FT employee) (§ 18.30.110; § 18.48.080; § 18.57.080 ). See parking.

Checklist

• Confirm the parcel is in the unincorporated county and identify its zoning and any overlays (overlay districts); note SAHO or DB if present (§ 18.64.030; § 18.65.010–.020 ).
• Verify minimum lot size/width and allowed residential density or FAR for the district (§ 18.30.060; § 18.34.050(B); § 18.48.090; § 18.57.120 ).
• Lay out setbacks on the site plan, including any special rules when adjacent to an R district (§ 18.45.060; § 18.48.050; § 18.49.050(E),(F) ).
• Check height limits, especially where proximity to R or C districts reduces allowable height (§ 18.45.070; § 18.48.060; § 18.57.100 ).
• Apply accessory-building rules (setback, separation, height) for sheds/garages/containers (§ 18.78.150 ).
• Confirm on-site parking ratios by district and show stall counts/locations (§ 18.30.110; § 18.48.080; § 18.57.080 ).
• If proposing SB 9 two-unit development, apply reduced setbacks and request modifications if needed to fit two 800-sf units (§ 18.84.030(D)–(F) ). If seeking a density bonus, prepare the required materials for incentives/waivers (§ 18.65.010–.020 and related procedures ).
• Check whether design review or signage standards also apply to the proposal; evaluate any nonconforming uses on site and whether a variance is needed.

Risks & Ambiguities

Information Gaps

• C-1 FAR standard: Not found in retrieved materials.
• An explicit R-1 “lot coverage” percentage cap: Not found in retrieved materials; § 18.30.100 references a coverage limitation without stating a number (§ 18.30.100 ).
• Any district-specific landscaping/screening metrics: Not found in retrieved materials; see landscaping and screening. Verify with the jurisdiction.

Plain-English Summary

If your property is in the unincorporated county, find your zoning and then check the matching box of rules for minimum lot size, required setbacks, and maximum building height. Commercial and industrial areas often have 0‑ft setbacks and use FAR limits that depend on the General Plan designation, while residential areas have deeper front yards and lower heights. Edge conditions next to housing tighten the rules, and special overlays (like the snow‑avalanche hazard area) can add restrictions. For parking, signage, and any design review, follow the district’s ratios and the cross‑references in the code.

Source References

• Title 18 definitions and general provisions: § 18.06.236 FAR; § 18.78.010; § 18.78.040; § 18.78.060–.110; § 18.78.150–.180 .
• Residential: R-1 (§ 18.30.010; .030; .060–.110) ; R-2 (§ 18.33.010–.060; .080–.090) ; R-3 (§ 18.34.010–.050) ; RR 0.5 Starlite Estates (§ 18.22.050) .
• Commercial: C-1 (§ 18.45.040–.080) ; C-2 (§ 18.48.040–.100) ; C-3 (§ 18.51.050) ; C-4 (§ 18.49.010–.050) ; C-5 (§ 18.54.010–.050) .
• Industrial: M-1 (§ 18.57.010–.120) ; M-2 (§ 18.56.010–.050) .
• Overlays/bonuses: SAHO (§ 18.64.010–.060) ; Density Bonus (§ 18.65.010–.020; .070; related procedures) ; SB 9 Two‑Unit Development (§ 18.84.010; .030(D)–(F)) .
• Cross-references: Signs (Ch. 18.75) as cited in multiple districts (e.g., § 18.30.050(F); § 18.45.040(C); § 18.48.040(C)) .

Retrieved passages

• Inyo County Zoning Code (§ 18.48.050.) High relevance show source text
• CBC § 800 High relevance show source text
• CBC § 5020.1 (Chapter 12.75) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 18.06.235.) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• CBC § 66314 (§ 66314) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 4) High relevance show source text
• Inyo County Zoning Code (§ 18.57.070.) Medium relevance show source text
• Inyo County Zoning Code (§ 4) Medium relevance show source text
• Inyo County Zoning Code (Section 18.06.223) Medium relevance show source text
• Inyo County Zoning Code (§ 4) Medium relevance show source text

Cited sections

• Title 18 definitions and general provisions: § 18.06.236 FAR; § 18.78.010; § 18.78.040; § 18.78.060–.110; § 18.78.150–.180 . (Title 18)
• Residential: R-1 (§ 18.30.010; .030; .060–.110) ; R-2 (§ 18.33.010–.060; .080–.090) ; R-3 (§ 18.34.010–.050) ; RR 0.5 Starlite Estates (§ 18.22.050) . (§ 18.30.010)
• Commercial: C-1 (§ 18.45.040–.080) ; C-2 (§ 18.48.040–.100) ; C-3 (§ 18.51.050) ; C-4 (§ 18.49.010–.050) ; C-5 (§ 18.54.010–.050) . (§ 18.45.040)
• Industrial: M-1 (§ 18.57.010–.120) ; M-2 (§ 18.56.010–.050) . (§ 18.57.010)
• Overlays/bonuses: SAHO (§ 18.64.010–.060) ; Density Bonus (§ 18.65.010–.020; .070; related procedures) ; SB 9 Two‑Unit Development (§ 18.84.010; .030(D)–(F)) . (§ 18.64.010)
• Cross-references: Signs (Ch. 18.75) as cited in multiple districts (e.g., § 18.30.050(F); § 18.45.040(C); § 18.48.040(C)) . (§ 18.30.050)
• InyoCounty_ZoningCode.md

• Official Inyo County code library