Project type
KitchenBathroomAdditionWhole-home
Size
Finish level
Builder-gradeStandard materialsMid-rangeQuality upgradesHigh-endPremium, custom

ADU Cost in Houston

A high-end ADU (accessory dwelling unit) in Houston typically costs $240,000–$390,000, about $400–$650 per square foot for a ~600 sq ft ADU. The biggest cost drivers are foundation & framing, kitchen & bath, and roofing & exterior.

$240k–$390k

Most high-end 1 bedroom projects in Houston fall within this range.

What a high-end ADU typically includes

  • Architect-designed unit
  • Custom kitchen & bath
  • Premium finishes
  • Separate metering & systems
  • Designer lighting

What could push the cost higher

  • Utility connections & metering
  • Site access & grading
  • Permitting & impact fees
  • Sewer or septic tie-in

Where your budget goes

CategoryEstimated range
HVAC$16,800 – $27,300
Insulation & drywall$19,200 – $31,200
Flooring & finishes$21,600 – $35,100
Labor & project management$28,800 – $46,800
Roofing & exterior$31,200 – $50,700
Plumbing & electrical$31,200 – $50,700
Kitchen & bath$38,400 – $62,400
Foundation & framing$52,800 – $85,800

Think of this as a starting point for budgeting. We use recent Houston-area remodeling data and national cost benchmarks to estimate what projects like yours could cost. Final pricing can vary based on your home’s condition, design choices, and contractor. Most projects also benefit from a contingency budget to cover surprises along the way.

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Frequently asked questions

A high-end ADU (accessory dwelling unit) in Houston typically costs $240,000–$390,000, or about $400–$650 per square foot for a ~600 sq ft ADU. Most projects fall within this range; final pricing depends on your home’s condition, design choices, and contractor.

A high-end ADU (accessory dwelling unit) typically includes architect-designed unit, custom kitchen & bath, premium finishes, separate metering & systems, and designer lighting.

Common reasons a ADU (accessory dwelling unit) runs past its estimate include utility connections & metering, site access & grading, permitting & impact fees, and sewer or septic tie-in.

A mid-range ADU (accessory dwelling unit) typically runs $156,000–$254,000, versus $240,000–$390,000 for high-end, about $105,000 less at the typical estimate.

Builder-grade ADU (accessory dwelling unit)Mid-range ADU (accessory dwelling unit)

Estimates based on recent Houston-area remodeling data and national cost benchmarks. They reflect typical Houston pricing for a high-end project, but keep in mind that this is a ballpark range. There are plenty of variables that may affect your pricing.