Can I Build ADU in Las Vegas, NV? (2026)
Find out if you can build a adu in Las Vegas, NV. Rules, permit requirements, costs, and next steps.
Yes, ADUs are allowed in Las Vegas, NV. California state law ensures by-right approval.
An Accessory Dwelling Unit (ADU) is a secondary housing unit on a residential lot — also called a granny flat, in-law suite, or backyard cottage. In Las Vegas, NV, ADUs are permitted by right under state law, making them one of the most accessible ways to add housing on your property. ADUs can be detached, attached to the main home, or created by converting an existing garage or accessory structure.
ADU Rules in Las Vegas
ADU Rules in Las Vegas: Detached ADU max size: 1200 sq ft. Attached ADU max size: Up to 50% of primary dwelling floor area. Setbacks: 3 ft side, 5 ft rear. Owner-occupancy: No owner-occupancy requirement. Nevada AB 383 explicitly prohibits cities from requiring owner-occupancy of either the primary or accessory dwelling as a condition of ADU approval.. State preemption applies: NV law requires Las Vegas to approve compliant ADUs by right.
Costs & Fees
ADU permits in Las Vegas: Total estimated permit cost: $3,000–$10,000 total fees. Contact the Las Vegas Building & Safety Division for current fee schedule.
Timeline
Nevada AB 383 mandates processing within 45 days of a complete application. Las Vegas Building & Safety Division administers permits. Electronic permits available through the Las Vegas Permit Portal.
Next Steps
Next steps for building an ADU in Las Vegas: 1. Review full ADU rules including size limits, setbacks, and parking. 2. Apply for an ADU permit through the Las Vegas Building & Safety Division at https://onlineservices.lasvegasnevada.gov/. 3. Hire a licensed contractor familiar with NV ADU requirements.
Las Vegas Building & Safety Division
Phone: (702) 229-6251
Website: https://www.lasvegasnevada.gov/Government/Departments-Offices/Building-and-Safety
Online Permits: https://onlineservices.lasvegasnevada.gov/
Frequently Asked Questions
Can I build an ADU on my Las Vegas property?
Yes. Nevada AB 383 (2021) requires Las Vegas to allow ADUs by right on single-family lots. You can build a detached ADU up to 1,200 sqft with only ministerial (administrative) permit approval — no neighborhood hearings or variance required. No owner-occupancy requirement. Permitting must be processed within 45 days of a complete application. Clark County School District development fees and Water Reclamation capacity fees apply.
Are Airbnb and short-term rentals allowed in Las Vegas?
Not in most residential zones. Las Vegas banned new short-term rental licenses in R-E, R-D, R-1, and R-2 zones in 2022. Existing licensed STRs were grandfathered through expiration. STRs are permitted in commercial zones. Important: Most of the Las Vegas Strip and resort area is in unincorporated Clark County — not Las Vegas city limits — which has a separate STR licensing system (Clark County Code Chapter 8.145). Verify your property's jurisdiction before applying.
What is the difference between Las Vegas city and Clark County jurisdiction?
Las Vegas city limits cover the urban core (downtown Las Vegas, most residential neighborhoods). The famous Las Vegas Strip (casino resort corridor) is in unincorporated Clark County and subject to Clark County zoning, not Las Vegas city codes. Henderson and North Las Vegas are separate incorporated cities with their own codes. When looking up permits, ADU rules, or STR requirements, always verify whether your address falls within Las Vegas city limits, Clark County unincorporated, Henderson, or North Las Vegas at the Clark County Assessor's website (assessor.clarkcountynv.gov).
Do I need a permit for a patio cover (ramada) in Las Vegas?
Yes. Patio covers, shade structures, and ramadas are very common in Las Vegas due to extreme summer heat (110°F+). Any permanent attached or detached patio cover requires a Las Vegas Building & Safety permit. Freestanding shade sails and fabric canopies under certain sizes may be exempt. Structural permits require plans showing attachment to the house foundation and wind-load calculations for Clark County's desert wind conditions.
How does solar net metering work in Las Vegas?
Las Vegas is served by NV Energy (Nevada Power). Nevada NRS 704.776 protects net metering rights — excess solar generation credited at approximately retail rate. Las Vegas has one of the highest solar irradiance levels in the US, making solar highly cost-effective. NV Energy interconnection agreement required for grid-tied systems. Las Vegas Building & Safety electrical permit required. SolarAPP+ available for faster permitting on eligible residential systems. No solar mandate applies to existing homes.
What are the water conservation rules for new construction in Las Vegas?
The Southern Nevada Water Authority (SNWA) imposes strict water conservation rules — Las Vegas has one of the most aggressive water restriction programs in the US due to Colorado River allocation limits. New residential construction must use water-efficient fixtures and no ornamental grass is permitted in new front yards (per Southern Nevada Water Authority Rule 3). Grass removal rebates up to $3/sqft are available. Swimming pools are allowed but require water-efficient equipment. Water Smart Landscapes rebates available for desert landscaping conversions.
Source: Las Vegas Building & Safety Division — Building Regulations. Last verified April 6, 2026. View source