Accessory Structures in Lyon County, NV (2026)
3 rules for unincorporated Lyon County, Nevada.
Verified from official government sources
ADU Rules
In unincorporated Lyon County, Nevada, the Rural Residential 20-acre minimum (RR-20) zone allows only one accessory dwelling unit per twenty gross acres under Lyon County Code section 15.311.01(F)(2). The unit cannot exceed one thousand one hundred square feet, or fifty percent of the primary home's livable space, whichever is smaller, and it must run on its own well and septic system, separated from other dwellings by at least fifty feet. Community Development reviews ADU permits against these zoning standards.
Lyon County rural residential ADU limits
Some RestrictionsLyon County Code § 15.311.01(F)(2)
2. Accessory dwelling units of no more than one unit per twenty (20) gross acres are permitted subject to the following limitations: a. Accessory dwelling units in excess of one per parcel are permitted for the purpose of housing employees and family members engaged in agricultural pursuits. b. Accessory dwelling units shall not exceed one thousand one hundred (1,100) square feet or fifty...
Shed & Carport Rules
Unincorporated Lyon County caps every accessory building, including sheds and detached garages, at 30 percent of the lot's total area and layers setbacks by height: structures up to 15 feet follow the front setback, while taller buildings must meet the full principal-structure setback under Chapters 310 through 314.
Accessory Building Rules in Lyon County, NV
Some RestrictionsLyon County Code § 15.335.03(A)(2)(a)
2. Accessory Building: a. Accessory building on lots less than two (2) acres: (1) The total square footage for all accessory building footprints on a lot shall not exceed thirty percent (30%) of the total lot area provided all required setbacks are maintained. (2) Accessory buildings shall not be located closer to an adjacent road than the principal stru...
Tiny Homes
In unincorporated Lyon County, Nevada, a “tiny house” is defined by the 2018 International Residential Code as a dwelling of 400 square feet or less excluding lofts with its own kitchen, bath and sleeping space. Community Development permits tiny houses only in districts that already allow accessory dwelling units, and each unit must meet IRC construction standards on a foundation stamped by a Nevada-licensed engineer.
Tiny Homes as Accessory Units in Lyon County NV
Some RestrictionsLyon County Code § 15.335.03(A)(1)(b)
b. “Tiny houses”, as defined by the 2018 International Residential Code (IRC), are “a dwelling that is 400 square feet or less in floor area excluding lofts” and as “a single unit providing complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation”. Tiny Houses, as defined in this provision, are permitte...
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