Local zoning · Lassen County

Lassen County — Zoning

Zoning under the Lassen County local zoning and planning code, with the controlling citations.

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Last reviewed: July 6, 2026

Overview

In unincorporated areas of Lassen County, zoning is governed by the Lassen County zoning ordinance (Title 18 Zoning). By default, all unincorporated land starts in the countywide “holding” zone and is then refined by map-based districts and overlays adopted by ordinance. The county now maintains an official GIS zoning dataset that depicts district boundaries and is kept current by Planning and Building Services; however, the ordinance text controls if there is any discrepancy. See the Lassen County zoning & planning overview for context on how zoning fits within local planning programs.

Core rule in unincorporated areas: All land is initially classified as the A-1 district, and more precise zoning applies only where the Board has adopted rezones consistent with the County’s General Plan.

The ordinance’s district system, development controls, and overlays work together with the General Plan and area plans to implement land-use policy. Applications and projects must also meet countywide standards such as yards, heights, parking, landscaping and screening, and design review.

District framework and maps

  • Districts and combining districts are established in the ordinance and shown on official zoning maps; the county’s adopted GIS zoning dataset is the maintained, official digital system. Where map boundaries are uncertain, interpretation rules apply and the Planning Commission may resolve boundary questions.
  • The title applies throughout the county’s unincorporated areas and is implemented by ordinance amendments (rezones) consistent with the General Plan.

Principal base districts (unincorporated areas)

A-1 General Agricultural District

  • Purpose and where used: The countywide “holding” classification for lands not yet assigned more precise zoning; applied across unincorporated areas until further zoning is adopted. Rezoning into A‑1 after its effective date is prohibited.
  • Typical uses:
    • By right: Any use allowed by right in R-1, U-C, U-C-2, and E-A (limited to one single-family dwelling by right; additional dwellings require a use permit). Certain kennels allowed subject to parcel size and residence.
    • By use permit: Additional dwellings; airports; excavation/mining; stockyards/feedlots; oil/gas operations; sawmills; mobile home/RV parks; and uses from designated companion zones (e.g., C‑T).
  • Key dimensional standards: Minimum setbacks of 20 ft front, 5 ft side (street side 10 ft on corners), and 10 ft rear (or 5 ft if abutting an alley). Commercial/industrial buildings require design review.

A-2 Agricultural‑Residential District

  • Purpose: Rural residential living compatible with agriculture.
  • Typical uses:
    • By right: One-family dwelling (plus one noncommercial guest house); agricultural uses; barns/outbuildings; kennels on parcels ≥5 acres with a residence. A “second dwelling unit” may be considered via certificate of conditional use if the parcel is at least twice the minimum parcel size.
    • By use permit: Country clubs/golf courses; kennels on smaller parcels or without a residence; public/quasi-public uses; guest ranches/public stables; farm labor quarters.
  • Key dimensional standards: 35 ft height, 35% lot coverage, 20 ft front, side = 10% of lot width (min 5 ft, max 15 ft), 20 ft rear; special spacing for accessory buildings.

A-3 Agricultural District

  • Purpose: Working agricultural lands.
  • Typical uses (by use permit): Commercial feedlots/stockyards/hog ranches; dairies; rendering/slaughter; geothermal production; airports for farm services; farm equipment sales/rental/repair; public stables.
  • Key dimensional standards: Minimum parcel 75 acres; setbacks typically 20 ft front, 10 ft side, 20 ft rear; special spacing for ag outbuildings/guesthouses.

E-A Exclusive Agricultural District

  • Purpose: Intensive agricultural production with long-term protection; no subdivision for residential tracts or nonagricultural commercial/industrial beyond what the chapter allows.
  • Typical uses:
    • By right: General agriculture; owner/operator dwellings; farm labor housing; greenhouses; roadside stands; private airstrips; small hydro (≤5 MW); kennels with established residence.
    • By use permit: Commercial feedlots/auctions/dairies; ag processing; animal hospitals; commercial farm service airports; geothermal/oil/gas exploration; offsite power generation; >5 MW hydro; kennels without prior residence.
  • Key dimensional standards: Minimum parcel 100 acres; minimum yards 20 ft front/side/rear.

U-C Upland Conservation District

  • Purpose: Mountain/foothill resource lands for forestry, mining, grazing, and watershed protection; also applied in areas suited for agricultural preserves.
  • Typical uses:
    • By right: Farm/ranch dwellings; agriculture, logging, grazing; private ag airstrips; small hydro (≤5 MW); kennels with residence.
    • By use permit: Poultry/fur farms; feedlots/dairies; ag processing; additional dwellings/labor housing; mineral extraction; energy projects; commercial recreation (guest ranches, rifle ranges, marinas, RV parks) where compatible.
  • Key dimensional standards: Minimum lot area 100 acres; yards 20 ft front/side/rear.

U-C-2 Upland Conservation/Resource Management District

  • Purpose: Resource management in upland, valley, floodplain and water-basin areas to efficiently manage timber, agriculture, wildlife, scenic and mineral resources.
  • Typical uses:
    • By right: One single-family dwelling; agriculture, logging; small-scale firewood processing; private ag airstrips; small hydro; kennels with residence.
    • By use permit: Sawmills/large firewood processing; commercial poultry/fur/fish/hog farms; ag processing; retail nurseries and permanent farm stands; labor housing; mineral extraction and plants; offsite power generation; geothermal exploration/production; commercial recreation facilities.
  • Key dimensional standards: Minimum lot 80 acres (unless otherwise specified via use permit); other standards largely borrow from U‑C.

T-P-Z Timber Production Zone District

  • Purpose: Long-term timber growing/harvesting consistent with the Timberland Productivity Act (Gov. Code § 51100 et seq.).
  • Typical uses: Timber growing/harvesting and related operations; watershed and habitat management; certain minor extraction; recreation compatible with timber (in Mountain Resort areas only for certain facilities).
  • Key standards: Division minimums 160 acres (or 40 acres with joint 160-acre plan); conformity with state TPZ provisions.

A-F Agricultural Forest District

  • Purpose: Forest and natural resource production and protection; includes residential uses where applied historically.
  • Uses: Management of land/forests for production and protection; logging/primary processing and accessory buildings; select uses via use permit.

R-1 Single‑Family Residential District

  • Purpose: Single-family neighborhoods and compatible accessory uses.
  • Typical uses: One single-family dwelling; accessory buildings; some community uses by use permit.
  • Key dimensional standards: 25 ft building height (up to 35 ft with design review); 35% lot coverage; 20 ft front, side = 10% of lot width (min 5 ft, max 15 ft with design review), 20 ft rear.

R-2 Limited Multiple‑Family Residential

  • Purpose: Duplexes and small multi-family consistent with single-family scale.
  • Uses: R‑1 uses, duplexes, 3–4 unit buildings; certain institutional uses by use permit.
  • Key standards: Similar to R‑1: 25 ft height (up to 35 ft with design review), 35% coverage, 20 ft front, side = 10% width (max 15 ft; can reduce to 5 ft with design review), 20 ft rear.

R-3 Multiple‑Family Residential

  • Purpose: Multi-family districts and dwelling groups; adds special spacing and design review.
  • Special provisions: Minimum separations and access widths for dwelling groups; all R‑3 development subject to design review; on large lots, parking area landscaping minimums apply.

C-L Local Convenience Commercial

  • Purpose: Neighborhood-serving retail/services near residential areas and recreation supply points.
  • Key standards: No front yard required (but maintain ≥50 ft from roadway centerline); side yard 15 ft (or 25 ft adjacent to R); rear yard 15 ft (or 25 ft adjacent to R); height up to 35 ft; design review and parking landscaping apply.

C-G General Commercial

  • Purpose: Urbanized-area commercial with broad retail and service offerings.
  • Uses: Broad retail/service list (including mini-storage by right in C‑G); select uses by use permit. Development standards follow C‑G chapter and related countywide standards.

C-H Highway Commercial

  • Purpose: Auto-oriented highway traveler services in carefully selected nodes.
  • Uses: Restaurants/refreshments; produce stands by right; RV parks, campgrounds, motels/hotels, service stations by use permit.
  • Key standards: Front yard 30 ft (and ≥50 ft from roadway centerline), side yard none except 15 ft next to R, height 35 ft; design review and access/landscaping controls apply.

C-1 Retail Business (legacy) and C-2 General Commercial (legacy)

  • Status: Retained for mapped areas but superseded for future use; no new rezonings to C‑1 or C‑2.
  • Typical C‑1 standards: No front yard (with R adjacency exceptions); height 45 ft; design review applies. C‑2 has lower height (20 ft) and similar yard exceptions.

B-P Business Park

  • Purpose: Light manufacturing, R&D, warehousing/wholesale in a park setting.

M-L Limited Industrial and M-1 Light Industrial

  • M‑L intent and standards: Clean, indoor industrial and related uses; minimum lot 6,000 sf; typical setbacks 20 ft front, 15 ft side/25 ft if next to R, 10 ft rear (25 ft next to R); height 45 ft. Select uses by use permit (e.g., heliports).
  • M‑1 intent: Light industrial with activities generally within buildings; permitted uses include animal hospitals/kennels, labs, mini-storage, day care, bottling, and similar light industry.

M Industrial (legacy) and M‑2 Heavy Industrial

  • M (legacy) standards: Height 75 ft; no front/side yards except at R adjacency; rear 12 ft (or 5 ft on alley). No new rezonings to M.
  • M‑2: Not found in retrieved materials.

P.U.D. Planned Unit Development

  • Purpose: Flexible, master-planned projects (residential/resort focus) requiring a Planned Development (P.D.) permit with customized standards; often sets densities and open space at approval.
  • Default P.U.D. metrics (if not otherwise specified): Minimum area 1 acre; single-family max density 10 du/ac; townhouses/condominiums 14 du/ac; multi-family 16 du/ac; minimum open space 50% of site; districts for component uses refer back to R‑1/R‑2/R‑3 and C‑L standards.
  • P.D. permit procedures in Ch. 18.116 coordinate plan content and subsequent entitlements.

P-C Planned Community

  • Purpose/standards: Provides integrated residential/commercial; standards point to R‑ and C‑ district controls with specified heights and parking minimums.

O-S Open Space

  • Purpose: Preserve open space and related resource uses; allows specified private uses (e.g., trails, utilities distribution, timber harvest, wildlife refuge). Certain public utility and public facility uses require a use permit. Recent ordinance amendments outline area/lot division restrictions.

O-C-B Public Campground/Boating/Beach

  • Purpose: Protect public recreational beach areas and limit incompatible development. Standards reference countywide provisions.

R-S Resort District

  • Purpose: Resort-oriented commercial and recreation; allows a mix of retail/food/drink by right and recreation, lodging, and marine-related services by use permit.

M-R Mountain Resort

  • Purpose: Four-season mixed-use resort village and neighborhoods with integrated recreation and extensive open space; corresponds to the “Mountain Resort” land use designation adopted by initiative.
  • Uses: Broad set of residential, lodging, retail, restaurant, office, recreation, and limited industrial support uses.

Additional mapped districts listed in the code

  • F-R Forest Recreation; I‑1 Institutional Use; O‑H Historical Site; O‑D Primitive Area; Y‑C Airport Commercial; C‑T Town Service District; and “Underground Utility Districts” are designated in the district list. Detailed provisions were not retrieved for these chapters. Not found in retrieved materials.

Combining and special overlay districts

  • AA Accessory Animal (combining): Allows small‑scale livestock with density and setback limits; requires special siting of animal shelters and minimum lot area for large animals.
  • A Agricultural (combining): Adds agricultural/livestock permissions and setbacks to the companion base zone.
  • A-P Agricultural Preserve (combining): Applies to Williamson Act preserves; permitted uses are those in the companion zone, with additional “compatible” uses per contract.
  • B Building Site (combining): Adjusts minimum site area and yards; includes optional “density option” for flexible parcel design while preserving average density.
  • D Design (combining): Listed; district-specific provisions not in retrieved materials. Not found in retrieved materials.
  • F Floodplain (combining): Adds flood‑protection development standards (elevate floor ≥1 ft above floodplain or provide engineered protection; protect sewage and water sources). Uses within floodplain often need a use permit.
  • G Geothermal (combining): Manages geothermal exploration/production within known resource areas; relies on companion zone plus geothermal‐specific controls.
  • H Highway (combining): Listed; provisions not in retrieved materials. Not found in retrieved materials.
  • NH Natural Habitat (combining): Protects mapped wildlife habitat; requires site development plan review and may specify average building site areas to control overall density.

Airport approach and height overlays:

  • Spalding Tract and Adin Airport approach zones (horizontal, conical, transition, and runway approach) regulate maximum structure heights and certain land uses near runways; maps are on file. Variances and permits are administered by the Planning Commission.

Selected cross-cutting standards

  • Countywide yard/height/general provisions apply in addition to each district’s rules; projects must also meet parking, landscaping and screening, and signage rules as applicable.
  • Many commercial and industrial projects require design review, including all C‑1/C‑2 and C‑H developments and industrial buildings in A‑1.

Quick-reference standards and uses (selected districts)

District Typical by-right uses Key dimensional standards Code Reference
R-1 One single-family dwelling; accessory buildings Height 25 ft (to 35 ft with design review); coverage 35%; setbacks 20 ft front, side = 10% width (min 5 ft), 20 ft rear § 18.22.030–.050
R-2 R‑1 uses; duplex; 3–4 unit buildings Height 25 ft (to 35 ft with design review); coverage 35%; 20 ft front/ rear; side = 10% width (min 5 ft) § 18.24.030–.050
A-2 One-family dwelling; agriculture; barns; kennels (≥5 ac w/ residence) Height 35 ft; coverage 35%; 20 ft front/rear; side = 10% width (5–15 ft) § 18.18.030–.050
A-3 Agriculture and related; intensive ag by use permit Min parcel 75 ac; 20 ft front/rear; 10 ft side § 18.20.040–.050
E-A General agriculture; farm dwellings; greenhouses Min parcel 100 ac; yards 20 ft all sides § 18.66.030–.050
U‑C Farm/ranch dwellings; agriculture/logging; small hydro Min lot 100 ac; yards 20 ft § 18.68.030, .050
U‑C‑2 One dwelling; agriculture/logging; small hydro Min lot 80 ac (unless set by UP) § 18.69.030–.050
C‑L Neighborhood retail/services No front yard; side 15 ft (25 ft next to R); rear 15 ft (25 ft next to R); height 35 ft § 18.30.050–.060
C‑H Highway-serving retail/food Front 30 ft; side none (but 15 ft next to R); height 35 ft § 18.28.050–.060
M‑L Light manufacturing, labs, warehousing Min lot 6,000 sf; front 20 ft; side 15 ft (25 ft next to R); rear 10 ft (25 ft next to R); height 45 ft § 18.40.030–.060
M (legacy) Industrial (legacy mapped only) Height 75 ft; zero front/side except near R; rear 12 ft (or 5 ft at alley) § 18.46.040–.090

Note: This table highlights commonly referenced districts. Always confirm companion overlays and any site-specific conditions in the adopted GIS zoning dataset and ordinance text.

Related topics you’ll likely need

Checklist

  • Identify your parcel’s zoning district(s) and any combining/overlay designations using the adopted GIS dataset; if in doubt, ask Planning to interpret boundaries.
  • Verify your intended use is allowed by right, requires a certificate of conditional use, or needs a use permit in your district.
  • Confirm dimensional standards (heights, yards, lot size/coverage) and any district-specific special provisions.
  • Check applicable countywide standards: parking, landscaping and screening, and signage.
  • Determine whether design review is required (common for commercial/industrial and some residential/multi‑unit projects).
  • If in an overlay (e.g., F Floodplain, NH Natural Habitat, Airport Approach), compile the additional development standards and any required studies/maps.
  • For multi-lot or clustered proposals, confirm if a P.U.D. or P.D. permit is appropriate.
  • For “second units,” note Lassen’s “second dwelling unit” provisions; then review current California ADU law before proceeding.

Risks & Ambiguities

Issue Why it matters What to verify
A‑1 default vs. precise zoning Many parcels remain A‑1 until rezoned; allowed uses can differ significantly Confirm current zoning map layer and any recent ordinance changes for your parcel.
Legacy districts (C‑1, C‑2, M) Some standards differ and new rezonings are discouraged If your site is mapped C‑1/C‑2/M, rely on the legacy chapter standards and confirm any intended rezone path.
Overlays (F, G, NH, Airport) Overlays can add elevation, habitat, or height limits beyond the base zone Pull overlay standards and any required site plans, flood elevations, or airport approach maps.
Second/Accessory units Local “second unit” rules differ from current state ADU mandates Coordinate local rules with state California housing laws and California ADU law. Verify with the jurisdiction.
Density option in B combining Flexible parcel design can change lot sizes but not net density Confirm average site area calculations and any deed restrictions required by Planning.
GIS vs. ordinance text The GIS dataset is authoritative for mapping, but text controls on conflicts If datasets or paper maps conflict, the ordinance text governs and GIS will be updated.

Plain-English Summary

If your property is in unincorporated Lassen County, start by checking your zoning on the county’s GIS layer. Most rural parcels fall in agricultural or upland conservation districts with large minimum lots and generous setbacks; homes, barns, and farming are usually fine, while commercial or multi‑unit projects need the right district and often a use permit plus design review. Overlays like floodplain, natural habitat, or airport approaches can add extra rules. When in doubt, Planning can confirm your map designation and the exact standards that apply.

Source References

  • Title 18 Zoning — effect, purpose, A‑1 default: § 18.06.010–.030; § 18.06.020(1)
  • District list and combining districts: § 18.08.010–.020
  • Establishment of districts/maps and GIS dataset: § 18.10.010–.020
  • General compliance rules: § 18.12.010
  • A‑1: § 18.16.010–.070 (uses, setbacks, design review; rezoning prohibited)
  • A‑2: § 18.18.030–.050 (uses, second unit certificate, standards)
  • A‑3: § 18.20.040–.050 (uses; standards)
  • E‑A: § 18.66.010–.050 (intent, uses, standards)
  • U‑C: § 18.68.010–.050 (intent, uses, standards)
  • U‑C‑2: § 18.69.010–.050 (intent, uses, standards)
  • T‑P‑Z: § 18.70.010–.060 (intent, qualifications, division standards)
  • A‑F: § 18.72.010–.040 (uses)
  • R‑1: § 18.22.010–.050 (uses, standards)
  • R‑2: § 18.24.010–.050 (uses, standards)
  • R‑3: § 18.26.060 (special provisions; group dwelling spacing in § 18.26.050 context)
  • C‑L: § 18.30.010; § 18.30.050–.060 (standards; design/parking/landscaping)
  • C‑G: § 18.32.010–.040 (intent; uses)
  • C‑H: § 18.28.010–.060 (intent; uses; standards; design review)
  • C‑1 (legacy): § 18.36.030–.090 (uses; standards; legacy status)
  • C‑2 (legacy): § 18.38.040–.110 (standards; legacy status; design/landscaping)
  • B‑P: § 18.39.010–.040 (intent; uses)
  • M‑L: § 18.40.020–.060 (uses; standards)
  • M‑1: § 18.42.010–.030 (intent; uses)
  • M (legacy): § 18.46.040–.090 (standards; legacy status)
  • P.U.D.: § 18.48.010–.040 (purpose; default densities/open space; cross-refs)
  • P‑C: § 18.50.040–.090 (uses; heights; site/parking; variances)
  • O‑S: § 18.64.030–.050 (uses; area rule)
  • O‑C‑B: § 18.56.010–.020 (intent; applicability)
  • R‑S: § 18.54.030–.040 (uses; resort services)
  • M‑R: § 18.55.010–.030 (purpose; uses) and supporting General Plan initiative references
  • AA, A, A‑P, B, F, G, H, NH (combining): § 18.78–18.90; § 18.94 (NH)
  • Airport approach overlays: § 18.134.010–.050; § 18.136.010–.060 (maps; height limits; permits/variances).

Sources

Retrieved passages

  • Lassen County Zoning Code (§ 18.16.050.) High relevance
  • Lassen County Zoning Code (§ 28) High relevance
  • Lassen County Zoning Code (§ 3) High relevance
  • Lassen County Zoning Code (title shall) High relevance
  • Lassen County Zoning Code (§ 56) High relevance
  • CBC § 61 (§ 61) High relevance
  • Lassen County Zoning Code (§ 2) High relevance
  • Lassen County Zoning Code (title applicable) High relevance
  • Lassen County Zoning Code (§ 18) High relevance
  • Lassen County Zoning Code (§ 5) High relevance
  • Lassen County Zoning Code (§ 18) High relevance
  • Lassen County Zoning Code (§ 13) High relevance
  • Lassen County Zoning Code (§ 58) High relevance
  • Lassen County Zoning Code (§ 18.69.040.) High relevance
  • Lassen County Zoning Code High relevance
  • Lassen County Zoning Code (§ 48) High relevance
  • Lassen County Zoning Code (§ 18.134.020.) High relevance
  • Lassen County Zoning Code (§ 48) High relevance
  • Lassen County Zoning Code (§ 12) High relevance
  • Lassen County Zoning Code (Chapter 18.84.) High relevance
  • Lassen County Zoning Code (§ 18.20.040.) High relevance
  • Lassen County Zoning Code (chapter be) High relevance
  • Lassen County Zoning Code (§ 30) High relevance
  • Lassen County Zoning Code (§ 52) Medium relevance
  • Lassen County Zoning Code (§ 52) Medium relevance
  • Lassen County Zoning Code (§ 22) Medium relevance
  • Lassen County Zoning Code (§ 55) Medium relevance
  • Lassen County Zoning Code (chapter for) High relevance
  • Lassen County Zoning Code (§ 21) High relevance
  • Lassen County Zoning Code (§ 26) High relevance
  • Lassen County Zoning Code (§ 18.66.040.) High relevance
  • Lassen County Zoning Code (title and) High relevance

Cited sections

Frequently asked questions

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

In unincorporated areas, R-1 allows one single-family home and customary accessory buildings. Key standards are 20 ft front yard, side yard equal to 10% of lot width (min 5 ft, max 15 ft with design review), 20 ft rear, and max height 25 ft (or 35 ft with design review).

What are typical agricultural setbacks in A-2 and A-3?

In A-2, front and rear yards are 20 ft and sides scale with lot width (5–15 ft). In A-3, minimums are generally 20 ft front/rear and 10 ft side. Accessory farm buildings have added spacing rules in both zones.

How do I know if my parcel is in a floodplain overlay?

Check the county’s adopted GIS zoning dataset and FEMA data; parcels with the F Floodplain (combining) district must elevate or protect structures and safeguard sewage/water systems per § 18.88.050. Uses in the floodplain often need a use permit.

Do commercial projects require design review?

Yes. Many commercial and industrial zones require design review—for example, all C‑1/C‑2 development, C‑H highway commercial, and any commercial/industrial buildings in A‑1. Always confirm your district’s chapter.

What are the minimum lot sizes in U-C and U-C-2?

In U‑C, the minimum lot area is 100 acres. In U‑C‑2, newly created parcels are generally ≥80 acres unless otherwise specified in a project approved by use permit.

Can I add a second unit or ADU on my rural property?

Local code provides for “second dwelling units” by use permit and sets design/parking/utility criteria. The code also states no areas allow “ADUs by right,” but state law has since changed—coordinate local § 18.108.270 with current California ADU law. Verify with the jurisdiction.

What is the difference between C-L and C-G?

C‑L serves nearby neighborhoods with convenience retail at neighborhood scale and has specific yards and height (e.g., side yard 15–25 ft, height ≤35 ft). C‑G supports broader, regional commercial uses with a wider array of retail/services by right.

What if my site is in an airport approach zone?

Airport overlays set maximum heights by zone (horizontal, conical, transition, runway approach) and restrict uses that could endanger aviation. Permits and variances are administered by the Planning Commission; maps are on file.

Can I propose a master-planned resort or cluster neighborhood?

Yes—Lassen uses P.U.D. zoning and/or a P.D. permit to entitle comprehensive plans with tailored densities and required open space (often ≥50%). See § 18.48 and § 18.116 for process/standards.

Where do I find the official zoning for my parcel?

Use the county’s adopted GIS zoning dataset for current mapping; if a conflict exists with the text or adopted rezoning ordinances, the ordinance text controls and the GIS will be updated.

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