Permit Required? Required
Typical Fee Range $1,500–$5,000 Governed by the Unified Development Code; fees include building and impact review.
Fee Method Valuation-based
Apply Online Apply at City of Las Vegas Department of Building and Safety →

What's Required in Las Vegas

  • Attached ADUs may be up to 50% of the primary dwelling's area, max 1,200 sq ft
  • Detached ADUs (Casitas) are capped at a maximum of 1,200 square feet
  • Must follow compliance codes related to size, design, and utilities
  • ADUs are not permitted to be sold separately from the primary residence
  • Minimum space allocation required for independent living (kitchen and bathroom)
  • One additional off-street parking space is typically required per ADU unit

How to Get a ADU Permit in Las Vegas

1

Step 1: Zoning Verification

Confirm lot size and setbacks for ADU eligibility via the Planning Division.

2

Step 2: Professional Plans

Secure IRC-compliant architectural and structural plans.

3

Step 3: Portal Submission

Submit a 'Residential New Construction' application via the dashboard.

4

Step 4: Fee Payment

Pay building fees and any proportional impact fees (estimated $1,500+) online.

5

Step 5: Full Inspections

Schedule the complete series: Foundation, Framing, Rough MEP, and Final.

Frequently Asked Questions

Yes, on qualifying single-family lots; detached units are capped at 1,200 sq ft.
Permit and review fees typically start around $1,500 and increase with unit size.
Typically 1,200 square feet for both attached and detached units.