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KitchenBathroomAdditionWhole-home
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Builder-gradeStandard materialsMid-rangeQuality upgradesHigh-endPremium, custom

ADU Cost in Houston

A mid-range ADU (accessory dwelling unit) in Houston typically costs $156,000–$254,000, about $260–$423 per square foot for a ~600 sq ft ADU. The biggest cost drivers are foundation & framing, kitchen & bath, and roofing & exterior.

$156k–$254k

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

What a mid-range ADU typically includes

  • Efficient open layout
  • Mid-range kitchen & bath
  • Upgraded finishes
  • Dedicated utilities
  • Energy-efficient windows

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$10,900 – $17,800
Insulation & drywall$12,500 – $20,300
Flooring & finishes$14,000 – $22,900
Labor & project management$18,700 – $30,500
Roofing & exterior$20,300 – $33,000
Plumbing & electrical$20,300 – $33,000
Kitchen & bath$25,000 – $40,600
Foundation & framing$34,300 – $55,900

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 mid-range ADU (accessory dwelling unit) in Houston typically costs $156,000–$254,000, or about $260–$423 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 mid-range ADU (accessory dwelling unit) typically includes efficient open layout, mid-range kitchen & bath, upgraded finishes, dedicated utilities, and energy-efficient windows.

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

Builder-grade ADU (accessory dwelling unit)High-end ADU (accessory dwelling unit)

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