In Texas, most adu projects cost between $50,000 and $200,000 per job, with a typical price near $100,000. Local labour, permits and materials move the final price, so treat the range below as a planning guide.
Typical adu cost
$50,000 – $200,000
per job · typical $100,000
A general planning range, not a quotation.
Adu cost breakdown
- Garage conversion$30,000 – $80,000typical $50,000
- Attached ADU (addition)$80,000 – $200,000typical $120,000
- Detached ADU (new build)$100,000 – $300,000typical $180,000
At a glance
- Typical range$50,000 – $200,000
- Unitper job
- Cities covered91
What ADUs costs
Costs cover design, permits, construction, and utilities for adding a separate living unit on your property. Detached units are pricier than attached or garage conversions. Local regulations and site conditions significantly affect price.
By city in Texas
- Abilene
- Allen
- Amarillo
- Arlington
- Atascocita
- Austin
- Baytown
- Beaumont
- Bedford
- Brownsville
- Bryan
- Burleson
- Carrollton
- Cedar Hill
- Cedar Park
- Channelview
- College Station
- Conroe
- Coppell
- Corpus Christi
- Dallas
- DeSoto
- Denton
- Duncanville
- Edinburg
- El Paso
- Euless
- Farmers Branch
- Flower Mound
- Fort Worth
- Friendswood
- Frisco
- Galveston
- Garland
- Georgetown
- Grand Prairie
- Grapevine
- Haltom City
- Harlingen
- Houston
- Hurst
- Irving
- Keller
- Killeen
- Kyle
- Lake Jackson
- Laredo
- League City
- Leander
- Lewisville
- Little Elm
- Longview
- Lubbock
- McAllen
- McKinney
- Mesquite
- Midland
- Mission
- Mission Bend
- Missouri City
- New Braunfels
- North Richland Hills
- Odessa
- Pasadena
- Pearland
- Pflugerville
- Pharr
- Plano
- Port Arthur
- Richardson
- Rockwall
- Rosenberg
- Round Rock
- Rowlett
- San Angelo
- San Antonio
- Schertz
- Sherman
- Spring
- Sugar Land
- Temple
- Texarkana
- Texas City
- The Colony
- The Woodlands
- Tyler
- Waco
- Waxahachie
- Weslaco
- Wichita Falls
- Wylie
Frequently asked questions
How much does an ADU cost on average?
Nationally, $100,000–$200,000 for a typical 600-1,200 sq ft unit. Garage conversions may cost less, while high-end detached units exceed $250,000.
What drives ADU costs?
Size, type (attached/detached), foundation, plumbing/electrical runs, and local permit fees. Site conditions like sloping land or need for a new sewer line increase costs.
How can I save on ADU construction?
Use prefabricated units, convert existing space, shop for contractors, and finance with a HELOC or construction loan. Check for local grants or incentives for ADUs.