Compare ADU zoning rules across 2 Nevada cities. Average ADU score: 4.0/10.
| City | Max Size | Setbacks | Permit Fees | Build Cost | 1BR Rent | Score |
|---|---|---|---|---|---|---|
| Henderson | 25% of the main single-family home's square footage (excluding carports, garages, unfinished basements), max 1,000 sq ft per Review-Journal reporting; some 2026 secondary sources cite a 1,200 sq ft cap — confirm the current limit with Henderson Community Development | Per underlying zoning district; minimum 6-ft separation from the main residence required — confirm exact district setbacks with Henderson Community Development | Confirm with Henderson Development Services Center | $130,000-$250,000 | $1,300-$1,650/mo | 3/10 |
| Las Vegas | Amended by Ordinance 6963 (July 2026) - codified text pending; the pre-2026 rule capped all accessory structures at 50% of the principal dwelling's floor area | 3 feet minimum for detached accessory structures, plus 6-ft separation from the main dwelling; no setback required from a property line abutting an alley | The old $1,030 Special Use Permit fee no longer applies to conforming ADUs under Ordinance 6963; building-permit fees are valuation-based | $130,000-$250,000 | $1,150-$1,450/mo | 5/10 |
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