ADU — Attached ADU Cost in Las Vegas, 2026

Why attached adu × Las Vegas produces this band

A attached adu scope for a adu in Las Vegas combines two price levers: scope and metro labor rates. Attached ADUs share a wall with the primary house. Needs its own entrance, fire-rated separation, and (in most jurisdictions) independent utility metering — but shares the site's foundation-extension cost. Against the national median remodel labor rate, Las Vegas runs 2% below the national median — so the attached adu band comes in 5% below the mid-range, then scales 2% below the national median on top of that. Permit timelines for residential work in Las Vegas typically run 3-8 weeks, which is the window you plan your design and decision sequence against. This page gives you the actual 2026 Las Vegas bands for this exact combination, plus the three cost drivers Baily asks about first when scoping the project live.

What drives cost for a attached adu scope

• ·Fire-rated wall assembly (typically 1-hour, sometimes 2-hour)
• ·Independent utility service drops
• ·Shared-wall sound isolation (STC 50+)
• ·Grading and drainage on the new footprint

What makes Las Vegas different

• Labor — Gaming + hospitality remodel cycles create periodic labor-supply tightness — residential remodel competes with hotel refurbishment.
• Labor — Summer 110°F+ heat shifts exterior trades to pre-dawn shifts.
• Labor — Non-union residential market with competitive rates outside of Strip-corridor peak cycles.
• Material — Desert-climate materials (reflective roofing, drip irrigation integration) are a small premium.
• Material — Regional supply from LA and Phoenix distribution hubs — lead times typically short.

Las Vegas rules that affect this scope

• Clark County Department of Building & Fire Prevention handles permits for unincorporated areas (most of the Strip + suburbs).
• City of Las Vegas handles residential within city limits — separate process from Clark County.
• Henderson and North Las Vegas each have their own building departments with distinct amendments.
• Nevada State Contractors Board (NSCB) licensing required for any work over $1,000 — verify license class matches scope.

Scope your adu with Baily.

Baily asks the eight questions that determine where your project lands inside the $168K-$354K band for Las Vegas and hands the scoped brief to one licensed builder.

Related pages

Questions LA homeowners actually ask

• What is the 2026 cost range for a attached adu scope adu in Las Vegas?

  $167,580-$353,780, with the median landing near $260,680. The range reflects finish tier and layout complexity within the attached adu scope; the Las Vegas labor multiplier of 0.98× vs national median is baked in.

• How long does a attached adu scope adu take in Las Vegas?

  22-32 weeks of on-site construction for the attached adu scope, plus 3-8 weeks of permit review in Las Vegas if the scope requires a permit. Cosmetic-only refreshes often skip permits; anything touching plumbing, electrical, or structural does not.

• What is the single biggest budget-overrun risk for this scope?

  Utility separation surprises — some markets require a new electrical service drop from the street, not just a sub-panel. Utility-company coordination adds 6-10 weeks and $8-14K.