Casita & ADU Cost in Las Vegas (2026 Guide)
What a detached casita or ADU actually costs to build in Las Vegas in 2026 — by size, by jurisdiction, and by finish level. Plus zoning rules in Clark County, Henderson, City of Las Vegas and North Las Vegas.
Last updated:
A detached casita or ADU in the Las Vegas Valley typically costs $175,000–$450,000 in 2026 depending on size, finish level, whether it has a full kitchen, and whether utilities are separately metered. This guide breaks it down by jurisdiction (Clark County vs. Henderson vs. City of Las Vegas vs. North Las Vegas), by size tier, and by what actually drives cost.
The three real size and finish tiers
| Tier | Typical size | Finish level | Total cost in Las Vegas |
|---|---|---|---|
| Studio casita | 400–600 sq ft | Kitchenette, 3/4 bath, builder-grade plus | $175,000 – $250,000 |
| 1-bed ADU | 600–900 sq ft | Full kitchen, full bath, mid-to-high finish | $240,000 – $360,000 |
| 2-bed luxury ADU | 900–1,300 sq ft | Full kitchen, 1.5–2 baths, designer finish, separate utilities | $340,000 – $475,000+ |
Jurisdiction matters more than people think
The rules and the permit timeline depend on which jurisdiction your parcel is in:
Clark County (unincorporated — Spring Valley, Enterprise, Paradise, parts of Summerlin South)
Clark County permits ADUs on most single-family parcels. Typical setbacks: 5 ft side, 10 ft rear. Maximum size is generally tied to lot coverage (often 25–35% of total lot). Permit timeline: 8–12 weeks for plan check.
City of Henderson
Henderson allows ADUs on most single-family parcels subject to similar setbacks (5 ft side, 10–15 ft rear depending on zoning district) and a parking requirement (usually one additional space). Permit timeline: 6–10 weeks. HOA architectural review in Anthem, Seven Hills and MacDonald Highlands adds 2–4 weeks.
City of Las Vegas
City of Las Vegas permits ADUs on most R-1 parcels. Setbacks are zoning-district dependent. Summerlin Council architectural review applies to all Summerlin parcels and adds 2–4 weeks plus design-consistency requirements (matching stucco, window line and roof profile).
City of North Las Vegas
City of North Las Vegas permits ADUs on most single-family parcels — Aliante in particular has many lots with the depth for a 700–1,000 sq ft detached unit. Permit timeline: 8–12 weeks.
What you're actually paying for
On a typical $300,000 ADU (~800 sq ft, full kitchen, 1 bath, mid-high finish):
| Line item | Approx. share |
|---|---|
| Site prep, foundation, slab | 10% |
| Framing, sheathing, roofing | 14% |
| MEP rough-in (electric, plumbing, HVAC) | 12% |
| Windows, doors, exterior stucco | 10% |
| Insulation, drywall, interior framing | 7% |
| Kitchen (cabinetry, counters, appliances) | 12% |
| Bathroom (tile, fixtures, vanity) | 7% |
| Flooring, trim, paint | 8% |
| Lighting, hardware, accessories | 4% |
| Permits, plan check, utility connections | 5% |
| Project management, supervision, contingency | 11% |
Things that move the cost number a lot
- Separate utility meters add $8,000–$18,000 (sub-panel and trenching to the main if doable; new service if not).
- A full kitchen vs. a kitchenette is a $12,000–$25,000 difference once you count cabinetry, range, range hood, and the larger sink and plumbing.
- A second bathroom (so a 2-bed ADU) adds $20,000–$35,000.
- Matching the stucco texture and color of an existing 25-year-old main house may require custom-mix work that adds $3,000–$6,000 to the exterior line.
- If the existing electrical panel can't support the new load, a service upgrade is $4,500–$9,000 from NV Energy.
Timeline
From signed contract to certificate of occupancy: 5–7 months for most ADUs in the Valley. That's typically 4–6 weeks of design, 8–12 weeks of plan check, 12–18 weeks of on-site construction, plus 1–2 weeks of final inspection and utility hookups.
Next step
If you'd like a real number on a casita or ADU for your property, the first step is a feasibility check — we look at your parcel's zoning, setbacks and lot coverage to confirm what's allowed before any design work begins. From there, a written ballpark takes a few days and a full design-and-permit package takes 6–10 weeks.
