Nevada ADU Laws & Permit Guide (2026)
Nevada's AB 396 (2025) required every county with 100,000+ residents and every city with 60,000+ residents — Clark County, Las Vegas, Henderson, North Las Vegas, Reno, and Sparks — to allow ADUs by right by July 1, 2026. Reno and Las Vegas both adopted compliant "casita" ordinances ahead of and on the deadline.
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Nevada ADU At a Glance
Permit Timeline
90–150 days
Average Build Cost
$95,000 – $220,000
Maximum Size
Varies by jurisdiction (Clark County: up to 1,200 sq ft)
Owner-Occupancy Required
Varies by jurisdiction
Impact Fees
Varies; Clark County charges connection fees
Setbacks
Varies; Clark County requires 5 ft rear and side
Recent Law Changes in Nevada
Passed in the 2025 session; local governments had until July 1, 2026 to comply. Requires counties with 100,000+ residents and cities with 60,000+ residents — Clark County, Las Vegas, Henderson, North Las Vegas, Reno, and Sparks — to allow ADUs by right on single-family lots. Local ordinances can't ban separate kitchens, require more than one extra parking space where existing or street parking already covers it, or block owners from renting out the ADU. Jurisdictions that missed the deadline lose the ability to restrict ADUs on residential parcels at all. Reno adopted its ordinance in October 2025; Las Vegas adopted Ordinance 6963 on the July 1, 2026 deadline.
Required Nevada cities and counties with a population over 100,000 to allow ADUs on single-family lots. Prohibited local ordinances that impose unreasonable restrictions on ADU development.
ADU Financial Returns in Nevada
💰 Rental Income Potential
ADU rental income in Nevada varies by location, size, and market conditions. Research comparable rentals in your area to estimate realistic monthly income.
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Factors That Increase ADU Value:
- • Separate entrance and utilities
- • Proximity to transit and job centers
- • Two bedrooms vs. studio layout
- • Dedicated parking space
- • Private outdoor area
Nevada-Specific Advantages:
- • Growing ADU acceptance
- • Estimated construction cost: $95,000 – $220,000
- • Typical timeline: 90–150 days
- • Max ADU size: Varies by jurisdiction (Clark County: up to 1,200 sq ft)
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Frequently Asked Questions — ADUs in Nevada
Are ADUs legal in Nevada?
Yes. AB 396 (2025) required every county with 100,000+ residents and every city with 60,000+ residents — including Clark County, Las Vegas, Henderson, North Las Vegas, Reno, and Sparks — to allow ADUs by right on single-family lots by July 1, 2026. Smaller jurisdictions set their own rules.
What is Nevada's 'casita law'?
AB 396 is commonly called Nevada's casita law. It required covered cities and counties to adopt ADU-friendly ordinances by July 1, 2026, or lose the ability to restrict ADUs on residential parcels at all. Local rules can't ban a separate kitchen, require more than one extra parking space when existing or street parking already covers it, or stop an owner from renting the unit out.
How much does it cost to build an ADU in Nevada?
Nevada ADU costs typically range from $95,000 to $220,000 for a detached unit. Las Vegas metro costs are lower than coastal California but higher than the national average, partly due to desert construction requirements. Garage conversions are often $40,000 to $90,000.
What is the maximum ADU size in Clark County (Las Vegas)?
Clark County allows detached ADUs up to 1,200 square feet, or 50% of the primary dwelling's square footage, whichever is less. The City of Las Vegas has similar allowances but check current code as limits can vary by zoning district.
Do I need to live on my property to build an ADU in Nevada?
Owner-occupancy requirements vary by jurisdiction. Clark County has historically required owner-occupancy for accessory units; check current code as this has been an evolving area. City of Las Vegas rules may differ.
How long does ADU permitting take in Nevada?
Permit timelines in Nevada typically run 90–150 days. With ADUs now a by-right use under AB 396 in covered jurisdictions, discretionary review delays should shrink going forward. Reno/Sparks permit timelines are similar to Clark County's.
Sources
- Nevada AB 473 (2021) — Legislature ↗
- Nevada AB 396 (2025) — Full Text ↗
- Clark County — Development Review ↗
- City of Las Vegas — Planning ↗
Disclaimer: The information on this page is provided for general informational purposes only and does not constitute legal, financial, or construction advice. ADU regulations change frequently — always verify current rules with your local planning department and consult a licensed professional before making decisions. ADUHomeResource.com is not liable for any errors, omissions, or outcomes resulting from use of this information.