ADU — Attached ADU Cost in Dallas, 2026

Why attached adu × Dallas produces this band

A attached adu scope for a adu in Dallas 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, Dallas runs 8% below the national median — so the attached adu band comes in 5% below the mid-range, then scales 8% below the national median on top of that. Permit timelines for residential work in Dallas typically run 3-8 weeks, which is the window you plan your design and decision sequence against. This page gives you the actual 2026 Dallas 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 Dallas different

• Labor — Non-union market with strong trade supply — labor rates 12-18% below national median.
• Labor — Growing luxury remodel segment (Highland Park, University Park) drives premium-finish crew demand.
• Labor — Foundation-repair demand is constant in North Texas (expansive clay soils) — pier-and-beam specialists busy year-round.
• Material — Texas is a major distribution hub — most national brands have DFW warehouses, keeping lead times short.
• Material — Summer thermal demand pushes HVAC sizing and spec higher than northern markets.

Dallas rules that affect this scope

• City of Dallas Building Inspection Division handles permits; residential turnaround is typically 3-8 weeks.
• Texas doesn't require state-level general-contractor licensing — vet GCs via BBB, references, and insurance certs.
• Highland Park + University Park enforce independent municipal codes stricter than City of Dallas (setbacks, materials, height).
• Flood-prone neighborhoods (Preston Hollow drainage, parts of Oak Cliff) trigger FEMA floodplain requirements.

Scope your adu with Baily.

Baily asks the eight questions that determine where your project lands inside the $157K-$332K band for Dallas 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 Dallas?

  $157,320-$332,120, with the median landing near $244,720. The range reflects finish tier and layout complexity within the attached adu scope; the Dallas labor multiplier of 0.92× vs national median is baked in.

• How long does a attached adu scope adu take in Dallas?

  22-32 weeks of on-site construction for the attached adu scope, plus 3-8 weeks of permit review in Dallas 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.