How much should I budget for my ADU build?

Many factors dictate the final cost such as unique site conditions, utility availability and the cost of potential upgrades, and other factors external to the build of the unit itself. We tell our clients a great starting point is $325/sf, plus or minus 5%. So, if your budget is $200,000, we would recommend a unit between 585-645sf. This number represents design through construction, so it is inclusive of all work required to obtain a Certificate of Occupancy. The price can go up or down from there, but it is a good starting point for setting budget and unit size expectations.

How long does it take to build?

We're still gathering data points on how quickly we can build adus, but on average 6-9 months.

Does your ADU service include design/build or construction management services?

Because ADU is a design-build company we can offer services from concept to keys. Wherever you are in the process - whether it be in the design phase or whether your project is permitted and ready for construction - ADU can help you reach your goals with your ADU build.

Austin Granny Flats

Close enough to help. Separate enough to live independently.

A granny flat — a small ADU in your backyard — is the middle path between moving in and moving away. Browse plans below; we tailor any of them for aging in place during design.

Popular:1 BR 2 BR Studios All plans

Austin, TX
Local design + build
Custom & Predesigned
Pick a plan or customize
293+ plans…+ plans
Pre-designed catalog
All Builds Warrantied
Standard on every build

Start from a plan that’s close — we tailor the rest

Single-floor layouts with a step-free shower and a bedroom-attached bath are the easiest starting points. But nothing here is fixed: every ADU we build is custom or semi-custom, so we can build in the aging-in-place features you need — wider doorways, a curbless roll-in shower, grab-bar blocking, lever handles, a zero-step entry — during design.

216 plans match — and we can tailor any plan for aging in place.

The Rather

Studio · 1 ba · 384 sqft

18'-8" x 24'-0" · Rectangle

Accessible-ready
Compact

The Lehrer

Studio · 1 ba · 395 sqft

18'-8" x 24'-0" · S-Shape

Accessible-ready
Compact

Take the whole catalog with you

All 293 of our plans — floor plans, sizes, and features — in one PDF. Enter your email and we’ll send it over.

Preparing your catalog…

Take the whole catalog with you

Every one of our plans — floor plans, sizes, and features — in one PDF. Enter your email and we’ll send it over.

Preparing your catalog…

How it works

Four steps. Accessibility choices get made up front.

Talk
What does mobility look like now?
Design
Pick a plan, adapt it together.
Permit
We handle the city paperwork.
Build
Construction and inspections.

What we've built

A few of our completed projects, paired with the plans they were built from.

The Abstract / Cedar Park

Cedar Park, TX

Recent build

Based on plan

The Abstract

Quick answers

The most-asked questions on multigenerational ADU builds.

How much should I budget for my ADU build?
Many factors dictate the final cost such as unique site conditions, utility availability and the cost of potential upgrades, and other factors external to the build of the unit itself. We tell our clients a great starting point is $325/sf, plus or minus 5%. So, if your budget is $200,000, we would recommend a unit between 585-645sf. This number represents design through construction, so it is inclusive of all work required to obtain a Certificate of Occupancy. The price can go up or down from there, but it is a good starting point for setting budget and unit size expectations.