ADU builder · Austin, TX

A second home for your Austin lot, from plans to keys.

Backyard cottages, garage conversions, attached ADUs and garage apartments. We design, permit and build them under one contract. Licensed and insured.

Check my lot
Small backyard home (ADU): A small house sitting on top of a lush green field
Compact kitchen
Detached garage

How much does an ADU cost in Austin?

As of October 2026, published Austin estimates put site-built detached ADUs at about $175,000 to $400,000 and garage conversions at about $80,000 to $150,000. Permit and impact fees are estimated at roughly $6,000 to $16,000 more. Size, soil, utility runs and finishes decide where your project lands.

After a site visit, you get a written, itemized quote. Read the Austin ADU cost guide.

Which kinds of ADUs do we build?

Detached ADUA freestanding backyard cottage with its own kitchen, bath and entry. Garage conversionAn existing garage rebuilt inside as a permitted dwelling. Attached ADUA new wing joined to the house, with a separate front door. Garage apartmentLiving space above a detached garage, a long-standing Texas form.

Every build starts with design and permits. Since the HOME amendments, many Austin lots can hold up to three homes; see what changed.

How does an Austin ADU project run?

  1. Step 1Lot checkZoning, deed restrictions, floodplain and utilities, before any drawings.
  2. Step 2DesignA floor plan sized to your coverage limits and budget.
  3. Step 3PermitWe submit to the city and answer its review comments.
  4. Step 4BuildFoundation to final inspection, with one point of contact.

Read the full process.

Where do we build?

Austin plus four neighboring cities. Texas has no statewide ADU law, so each city writes its own rules, and they differ a lot.

Round RockGarage conversions in older subdivisions and limited ADU zoning.ADUs in Round Rock Cedar ParkSmall, family-use units under strict size and rental limits.ADUs in Cedar Park PflugervilleOwner-occupied lots, with the unit sized to the main house.ADUs in Pflugerville GeorgetownA new development code taking effect in late 2026.ADUs in Georgetown

Austin and all service areas.

What will your Austin lot allow?

Send your address and we will tell you what your lot can hold. The lot check is free. We work in Austin, Round Rock, Cedar Park, Pflugerville and Georgetown.

Free, with no obligation. We use these details only to reply about your project.

Austin ADU questions, answered

How much does an ADU cost in Austin? What are Austin's ADU rules after the HOME amendments? Does Texas have a statewide ADU law? Can an HOA or deed restriction stop an ADU in Austin? How much rent can an ADU make in Austin? Are ADU rules different in Round Rock, Cedar Park, Pflugerville and Georgetown?