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ADU Contractors in Washington County

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Portland / 50 mi
Accessory Dwelling Units
1 – 15 of 482 professionals
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482 Professionals

Featured Reviews for ADU Contractors in Washington County

Sasquatch Architecture
ADU Contractors in Washington County
Average rating: 5 out of 5 starsAugust 22, 2023
“I have had two separate projects with Sasquatch architecture and both came in under budget and on time. Kris is very responsive and provides excellent suggestions throughout the development of the project.”
COOPER Design Build
ADU Contractors in Washington County
Average rating: 5 out of 5 starsJuly 25, 2013
“Cooper Design Builders completed a beautiful and timely remodel of our home in 2012. We couldn't be more pleased with the results. The Cooper Design Builders team is professional and respectful and they have fantastic relationships with their top quality Sub-contractors. Thanks for helping us create the house of our dreams. Michael (Forest Heights, Portland)”
Kopp Construction Co
ADU Contractors in Washington County
Average rating: 5 out of 5 starsAugust 18, 2016
“This is the 4th time that we have used Kopp Construction, both for small and large projects. His prices are competitive, he uses first quality subs and he is responsive to our needs and concerns. The jobs have come in on budget on on time for every project he has done for us. I am very comfortable about recommending Kurt for projects of any size.”
Terry Wilson Construction LLC
ADU Contractors in Washington County
Average rating: 5 out of 5 starsOctober 5, 2018
“Terry did an upgrade on my kitchen, new electrical, cabinets, counter top and floor. We were so pleased, we had him remodel our basement, including a tv room, new flooring and lighting. He's professional, dependable and has great remodeling ideas.”
EverLife Home
ADU Contractors in Washington County
Average rating: 5 out of 5 starsAugust 22, 2017
“Keith and Everlife did a great job on my house and pathway. They did the job at bid and in the time frame agreed to. Great workmanship to match my brand new house. Thank you”
JRW Construction LLC
ADU Contractors in Washington County
Average rating: 5 out of 5 starsJuly 7, 2023
“JRW Construction came highly recommended to us. Josh & Becca have been very responsive to all our inquiries and have worked well with the city to ensure our permits would be handled expediently. We’ve been very happy with the work they’ve done and their customer service.”
C&K Custom Remodeling Inc.
ADU Contractors in Washington County
Average rating: 5 out of 5 starsSeptember 6, 2013
“I hired C & K Custom Remodeling for a kitchen remodel. I was more than happy with their professionalism and workmanship. Lloyd and his crew finished on-time and on budget. I honestly was over the moon with the final result. I was so happy that I ended up hiring them to remodel both of my bathrooms. C & K Custom remodeling is top notch! T. Butler”
Harbold Homes LLC
ADU Contractors in Washington County
Average rating: 5 out of 5 starsNovember 16, 2023
“Nate worked on our kitchen / laundry room / guest bath remodel in 2020. In 2022, we hired him to replace our deck and installed new railings. In 2023, we needed to replace windows on our beach house he was the only person we contacted. His workmanship and attention to detail is incredible. We like working with him as he meets his commitments and communicates throughout the entire project. He also offers up suggestions and ideas and is a pleasure to work with. We will use him on future projects and have referred him to neighbors and family.”
Oscar Tile LLC
ADU Contractors in Washington County
Average rating: 5 out of 5 starsApril 30, 2018
“We had an excellent experience with Oscar Tile. They were prompt, easy to deal with, and had a high attention to detail. We would definitely use them again.”
Fir Construction LLC
ADU Contractors in Washington County
Average rating: 5 out of 5 starsSeptember 5, 2023
“These guys know what they’re doing. Remodeled my house; straight and to the point; took the time to do a quality job. They were sure to customize my wants and design preferences. I’ve worked with a lot of contractors over the years, Fir is one of the best.”
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ADU Contractor FAQs
Just answer a few questions to get matched with a local ADU Professional.
Or browse through the list of trusted ADU Professionals in Washington County on Houzz: See Washington County ADU Professionals’ profiles, dive into their work photos and check out customer reviews.
  1. Reach out to the pro(s) you want, then share your vision to get the ball rolling.
  2. Request and compare quotes, then hire the ADU Professional that perfectly fits your project and budget limits.
The most popular ADU Professional Services in Washington County are:
  • ADU Design and Planning
  • ADU Construction and Installation
  • ADU Conversion
  • ADU Permitting and Code Compliance
  • Accessory Dwelling Unit Architectural Services
  • ADU Interior Design
  • ADU Consultation and Project Management
There are 487 ADU Professionals, registered on Houzz in Washington County.

An accessory dwelling unit (ADU) is a separate living space that can be added to your property. It functions as an additional dwelling on the same land where your main home is located. ADUs have their own amenities and entrance, providing a self-contained living area. Unlike a traditional home, an ADU cannot be sold separately and is considered part of the same property.

ADUs are subject to specific zoning regulations and building codes in Washington County. These regulations determine where and how an ADU can be constructed, ensuring compliance with local laws and requirements. It’s important to consult with local authorities or a professional contractor who is familiar with ADU regulations in your area to understand the specific legal differences and ensure your ADU meets all necessary criteria.

Consider these options for cost-effective ADU:
  1. Prefabricated ADUs: Affordable and easy to assemble, they’re a practical choice. Many prefab ADUs cost under $100,000.
  2. Traditional Construction: Work with an ADU contractor to find budget-friendly options and make smart choices.
Tips for cost-effective ADU construction:
  1. Define your needs: Determine the purpose of your ADU, whether it’s for family, rental income, or a home office.
  2. Consult a contractor in Washington County: Their expertise can help with cost-effective materials, designs, and planning.
  3. Prefabricated components: Consider using prefabricated elements like cabinets or bathroom fixtures to save time and money.
  4. Explore financing options: Look for ADU-specific loans or programs to help cover costs.
Ensure compliance with local regulations and seek professional advice. A knowledgeable contractor can make the process smoother and cost-effective.
Why Hire Accessory Dwelling Units on Houzz?
482Local Pros on Houzz Who Serve Washington County, OR
1M+Total Number of Reviews Left by Homeowners
The cost to build a pool in Washington County, OR can vary widely based on factors such as size, type, and location. For detailed cost estimates, check
out the In-Ground Pool Cost.