5 county-level rules, plus city-specific rules for 4 cities in Clark County, Nevada.
Verified from official government sources
Unincorporated Clark County regulates Accessory Dwelling Units (ADUs, locally called Accessory Apartments) under Title 30 (Unified Development Code). Recent code amendments have eliminated the minimum lot size requirement, removed the one-bedroom cap, and now explicitly allow basement ADUs. ADUs are permitted in the R-U, R-A, R-E, R-D, R-1, R-T, R-2, H-2, and H-1 zoning districts.
Sheds under 200 square feet and 12 feet tall generally need no building permit in Clark County but must meet Title 30 setback rules. Larger sheds or any shed with electrical or plumbing require a permit.
Unincorporated Clark County regulates garage conversions to habitable space under Title 30 (Unified Development Code) and the locally adopted 2018 International Residential Code. Conversions to accessory apartments are permitted in the R-U, R-A, R-E, R-D, R-1, R-T, R-2, H-2, and H-1 zones, but unlike California, Clark County does not have a state mandate prohibiting replacement parking when a garage is converted.
Carports in Clark County require a building permit when attached to the house or over 200 square feet. Freestanding metal carports must meet the 90 mph Las Vegas Valley wind design and Title 30 setbacks.
Unincorporated Clark County permits tiny homes under Title 30 (Unified Development Code) following Nevada SB 150 (2021), which requires Clark County to designate at least one zoning district for tiny houses as ADUs, as single-family residences, and in tiny house parks. The county code defines a tiny home as a detached single-family dwelling built on a foundation, minimum 150 sq ft, per the International Residential Code.
4 cities in Clark County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.
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Clark County Ordinance Hub →