Custom Accessory Dwelling Units (ADUs) for Beaverton and Portland Metro Homes
Turn a garage, a basement, or a corner of your backyard into a complete, private home with its own kitchen, bathroom, and entrance. Our Beaverton remodeling team handles the design, permits, and construction under one fixed-price agreement.
A Smarter Way to Add Living Space to Your Oregon Property
An ADU is a second, self-contained home on the same lot as your main house. Families across Washington County build them for aging parents, adult children moving back home, long-stay guests, or a quiet long-term rental. Whether you live on an established street in Raleigh Hills or a newer neighborhood in Hillsboro, we design an ADU that fits your lot, your budget, and the look of your main home.
Oregon law requires cities like Beaverton, Hillsboro, Tigard, and Portland to allow ADUs alongside detached single-family homes. Each city still sets its own rules for size, height, and placement, so we confirm what your property allows before design begins. Thinking about a larger project? Our guide to costly home extension mistakes is a good place to start.
Enhancing Lives. Improving Homes.
Full Service ADU Design and Construction in Washington County
An ADU fits a whole home into a small footprint, so every square foot has to work hard. Our local team plans the layout, manages the permits, and coordinates every trade, from framing and plumbing to the final cabinet pull. You get one point of contact and one schedule from start to finish.
Garage Conversion ADUs
Turn an underused garage into a bright studio or one-bedroom suite with insulation, windows, and its own entrance.
Basement and Lower-Level ADUs
Convert a basement into a private apartment with egress windows, a full bathroom, and warm, dry living space.
Attached ADUs and In-Law Suites
Add a connected suite with a separate entrance so family can live close by and still enjoy their own space.
Detached Backyard Cottages
Build a freestanding cottage designed to match your main home and the character of your neighborhood.
Compact Kitchens and Full Baths
Enjoy the same custom cabinetry, quartz counters, and tiled showers from our kitchen and bath remodels, sized to fit.
Accessible, Age-Ready Layouts
Plan for curbless showers, wider doorways, and grab bar blocking so the unit works for every stage of life.
Why Portland Metro Homeowners Trust DreamMaker With Their Accessory Dwelling Unit (ADU)
An ADU is a new home, not a single-room update, so the builder you choose matters. We bring local experience since 1998, a fully licensed and insured team (License #132328), and a Design Center on SW Canyon Road where you can see every finish before you commit. Guided by our Code of Values, you get one team, one fixed-price contract, and one dedicated Project Manager from the first sketch to move-in day.
Personalized Service
Our team knows the homes, styles, and needs of local homeowners — and we guide you through every step of your remodel.
Design-to-Build Simplicity
From your initial vision to the final walkthrough, we manage the entire process for a seamless, stress-free experience.
Trusted & Proven Results
With a track record of satisfied homeowners, industry awards, and GAF Master Elite recognition, you can remodel with confidence.
Real Local Projects
The Craftsmanship That Goes Into Every Room of Your Accessory Dwelling Unit (ADU)
A great ADU depends on a hard-working kitchen, a well-planned bathroom, and storage in every corner. These recent Portland metro projects show the finishes and planning our team brings to every unit.
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Mt. Tabor, Portland
Bright Kitchen and Bath Remodel
A kitchen and primary bath remodeled together, with an island range, glass-front uppers, a walk-in shower with bench, and vinyl plank flooring throughout.
View project -
Beaverton
Two-Bathroom Home Upgrade
A walk-in shower with a built-in corner bench, grab bars, and a handheld wand, the same age-ready features we plan into ADU baths.
View project -
Raleigh Hills
Multi-Room Living Space Transformation
Built-in storage, an entry bench with cubbies, a corner office desk, and a raised laundry station, all tied together with one finish palette.
View project
Our ADU Process
From First Sketch to Move-In Day
Building a second home on your lot takes careful planning. Our seven-step system covers design, permits, and construction in a clear order, with a fixed-price contract and steady updates so you always know what comes next.
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Meet with a DreamMaker designer in our Design Center to share your vision and inspiration. Next, we’ll schedule your home survey and design review.
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We’ll visit your home to measure, photograph, and review any structural or system needs, ensuring your plan and estimate are precise. Then, we’ll schedule your design review.
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We’ll go over your custom designs and finalize a plan that reflects your vision. Along with the designs, you’ll get detailed proposals so you can see the costs and make informed choices.
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The contract lays out your project scope, start date, timeline, and all necessary documents, so everyone is on the same page. We’re committed to delivering exactly what we promise.
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Once your plans and agreements are set, your Project Manager will meet with you to go over the project scope, timeline, and construction process, making sure all details are clear before work begins.
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Your Project Manager oversees the remodel, keeping everything on track and answering any questions along the way.
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We’ll walk through your remodeled space, ensure everything meets your expectations, and complete any needed touch-ups.
“From the first contact with DreamMakers I sensed the company was professional and I anted to please the client. The planning process was very thorough and included a series of meetings to make choices and always check the budget with me. I felt in control of the process. The designer they provided me was excellent! I went with colors and some styles I might not have chosen- but I love them.
All of the staff I worked with including the client representative, the manager, the carpenter and the workers were polite, considerate and hard working.
I am very happy with the results!”
Jean W.
Portland, OR
“The staff was amazing! Carolina, my designer has been awsome through the whole process. They were all professional in every regard. I would highly recommend them. They have completed my kitchen and are currently finishing the rest of the house!”
Chris T.
Aloha, OR
Questions About Building an ADU in the Portland Metro?
Adding a second home to your property raises big questions.
Here are straight answers to the ones we hear most often at our Design Center.
What is an accessory dwelling unit?
An ADU is a small, self-contained home on the same lot as your main house, with its own kitchen, bathroom, sleeping area, and entrance. It can sit inside your home, attach to it, or stand on its own in your backyard. Many homeowners know them as in-law suites, granny flats, or backyard cottages.
Can I build an ADU on my Beaverton property?
In most cases, yes. Oregon law requires cities like Beaverton, Hillsboro, Tigard, and Portland to allow ADUs alongside detached single-family homes. Lot size, setbacks, utility connections, and any HOA rules still shape what fits, so we review your property and local code during the in-home visit.
Do you handle the permits for an ADU?
Yes. We manage the permitting process with your city and across Washington County, and we make sure your design meets Oregon building codes before construction begins. You will never have to chase paperwork on your own.
How much does an ADU cost in the Portland metro?
Cost depends on the type of ADU, its size, the condition of the existing space, utility connections, and your finish selections. A garage or basement conversion usually costs less than a new detached cottage because the structure already exists. We offer complimentary consultations and a detailed, fixed-price proposal before any work starts.
How long does an ADU project take?
Timelines depend on the ADU type, city permit review times, and your material choices. We stage all materials before construction begins to prevent delays, and you receive a clear project calendar during the design phase.
Can an ADU work for aging parents or family members with mobility needs?
Absolutely. Our accessible remodeling experts can build in zero-threshold showers, wider doorways, comfort-height fixtures, and reinforced walls for future grab bars. Learn more in our guide to designing an accessible home.
Can I see finishes and layouts before construction starts?
Yes. Visit our Design Center at 13227 SW Canyon Rd D, Beaverton, to compare cabinetry, countertops, tile, and flooring in person. Our designers also use 3D renderings so you can walk through your ADU before the first wall goes up.
Local ADU Experts Since 1998
Building ADUs for Washington County and Beyond
From established streets in Raleigh Hills to growing neighborhoods in Hillsboro and Tigard, we help homeowners add flexible living space that fits both the lot and the neighborhood.
Serving Greater Portland and Surrounding Communities
Beaverton | Portland | Hillsboro | Tigard | Lake Oswego
Start Planning Your ADU Today
Tell us how you want to use the space, and we will show you what your property can hold. Call (503) 295-2284 or visit our SW Canyon Road Design Center to start the conversation.