unrivaled ADU design & build service

Book a FREE Consultation

A full-service Portland & Willamette Valley design-build team

We work in tandem with a team of design professionals, craftsmen and specialists to support each phase of a project, from analysis to concept, all the way to key handover.

An ADU (Accessory Dwelling Unit) is a legal and regulatory term for a secondary house or apartment that shares the building lot of a larger, primary house.

ADUs are essentially secondary dwelling units on the same lot as an existing, primary home.

They have a long history (think of an old carriage house), but with housing shortages looming, are coming back in a big way!

The secret is out — building an ADU is an incredible way to unlock more value (monetary and otherwise) in your property, including:

  • Increase property return on investment
    create affordable
  • Sustainable housing
  • Additional living space for friends and family such as grown children
  • Age-in-place
  • Rental income

Our Unparalleled ADU Design & Build Process

We are unique in offering design & build services, taking you from A-Z with minimal fuss (and no unexpected surprises).

No need to give yourself a headache trying to figure out the difference between R2.5, R7, and R10 zoning and which is relevant for your property…

No paying steep design fees only to find out after locating a contractor that the project will require twice the time and three times the funds you had hoped for!

Our clear, straightforward communication ensures you avoid wasting your time and energy researching feasibility, and have full financial visibility right from the beginning.

Book a FREE Consultation

We offer FREE phone consultations to determine the best configuration for your property, so just head over to our contact form to get in touch!

From initial consultation to design to construction, we’ll guide you through:

Before we kick off, our team will conduct a FREE phone consultation to determine the feasibility and placement options for your ADU. We’ll also investigate permit requirements and site-specific costs to provide a timeline and estimate of the total cost of the ADU on your property.

Get instant access to design schematics and your project’s progress, straight from your smartphone.

During the design process, we will walk you through the project via an online 3D model. We use collaborative construction software during the build process, ensuring maximum control and visibility is always at your fingertips.

Ready to get started?

Click the button below to book a FREE virtual appointment where we’ll review your ADU goals and the details of your property, walk you through project options and our comprehensive design/build process, and address any questions you may have.

Schedule An Appointment

Types of ADUs We Build:

ADUs can be created in many different shapes and styles — and can look very different depending on a variety of factors, depending of course on the reason for building, as well as the lot size of the property, design of the original home, and other factors.

The most common forms of ADUs in Portland are detached, garage conversion, or basement ADUs. ADUs may also be built as an addition to the primary home on its side or in the attic, or as part of the primary floor’s footprint.

Detached ADUs / Structures

Garage ADUs

Basement ADUs

View Our ADU Portfolio

Hear what some of our customers have to say:

We are very happy with their work

“ADU Design & Build did a fantastic job on our garage conversion ADU.

They had great communication with quality craftsmanship, and all done on time.

We are very happy with their work and would definitely recommend them to anyone considering a contractor for their ADU.”

You can’t go wrong with ADU Design & Build

“ADU Design & Build did a remarkable job in designing and building our ADU (which became a very successful AirBnB).

The quality of the design and craftsmanship was impeccable and has received many compliments from our guests.”

You should absolutely trust ADU Design & Build with your project

“I worked with this group for two projects. Both were done extremely well.

They provided us with a detailed bid that was very competitive and stayed on top of all of the details for us. They also provided regular updates and responded quickly if we ever had questions.”


We love that you’re considering our premier design & build process to make your dream ADU a reality.

Whether you’re looking to generate additional passive income, create multigenerational housing for your loved ones, or add more valuable living space to your property for yourself and/or visitors, we can’t wait to hear from you.

Please complete and submit the form below, and we will be in touch within 3 business days.

If you're unsure about completing the form, you're welcome to email our founder and lead estimator directly at trevor@adudesignandbuild.com.