Exterior Build
Modern ADU Exterior
A clean and modern exterior designed for lasting curb appeal.
Limited Time Offer - Get Free Detailed 3D Design. Free Consultations. (206) 483-2877
Custom ADUs Built for Comfort, Function & Long-Term Value
We design and build high-quality ADUs that add space and increase property value—handling everything from permits to final construction for a smooth, stress-free process.
Custom ADU solutions designed for your property
Licensed, Bonded & Insured professionals
Garage conversions, attached & detached ADUs
Clear timelines and dependable project management
Trusted by homeowners throughout Washington
5-Star Customer Reviews ⭐⭐⭐⭐⭐
Call Now (206) 483-2877
Let’s Talk About Your Project
0
Projects Completed
Washington’s Trusted ADU Builders
Building an accessory dwelling unit requires careful planning, quality construction, and experienced professionals. Northwest Builders & Renovation delivers custom ADU solutions designed for comfort, functionality, and long-term value.
Custom ADU designs tailored to your property
Licensed, bonded & insured construction experts
Experienced builders with 15+ years of craftsmanship
Efficient construction with clear timelines
Trusted by homeowners across Washington
Designed for comfort, flexibility, and rental potential
ADU Project Showcase
Northwest Builders & Renovation ADU Construction Projects
Browse completed ADU construction projects and open any image for a smooth full-screen gallery experience.
Interior Finish
Finished Interior Space
Beautiful interior finishes built for comfort and functionality.
Living Design
Luxury ADU Living Area
Open, inviting, and built with premium design details.
Backyard Project
Backyard ADU Build
A private backyard unit crafted with precision and care.
Open Layout
Open Concept Interior
A bright and efficient layout designed for everyday living.
Completed Project
Completed Premium ADU
A polished finished space that reflects quality craftsmanship.
Local Professional ADU Builders
Your ADU is more than just additional square footage — it’s a smart way to expand your home, create rental income, or add space for family. At Northwest Builders & Renovation, we build with precision, experience, and careful attention to detail developed through years of residential construction and remodeling work.
Each project is assigned a dedicated project manager to keep communication clear and the building process organized from start to finish.
Our Reviews
Hear From Our Clients
Northwest Builders & Renovation continues to stand out with custom solutions, certified professionals, and a client-first mindset. Homeowners receive more than a remodel. They get a well-managed, thoughtful experience.
★ ★ ★ ★ ★
this company was able to fix everything and make our kitchen and bathrooms look even better than we anticipated.
Perez S.
★ ★ ★ ★ ★
We had our entire deck rebuilt after years of wear and tear. Nathan and his team designed something both sturdy and beautiful. The attention to detail is amazing — we’ve already hosted several gatherings out there and everyone compliments the new deck. Excellent work!
Theodore Afeef
★ ★ ★ ★ ★
The hard working crew did a very good job just to ensure the job is completed. We got our roof replaced with Northwest Builders & Renovation today.project manager Issac S. was very friendly.It is beautiful and fantastic experience.
Boone K.
★ ★ ★ ★ ★
We hired Mary for our kitchen and dining room remodel.The lighting, cabinetry, and flooring all came together perfectly.
Jonathan A.
★ ★ ★ ★ ★
These guys were great. Totally trust them to provide excellent services
David Prince
★ ★ ★ ★ ★
They were fantastic. Project manager Danny came out, was very flexable with my scheduling, and knowledgeable on what repairs were needed. Fair price, great work, couldn't be happier.
Rosemary M
FAQ
Frequently Asked Questions
Have questions? Our ADU experts are here to help.
Most ADU projects take between 6 to 10 months, depending on the scope, permits, design, and construction requirements. You’ll receive a clear timeline before work begins.
Yes. Northwest Builders & Renovation manages all required permits and inspections, ensuring compliance with Washington state and local codes.
Absolutely. We guide you through siding, flooring, cabinetry, fixtures, and finishes that balance durability, maintenance, comfort, and style.
Yes. Every project includes a free detailed 3D ADU design so you can visualize the final layout before work begins.
Yes. We specialize in building ADUs for a variety of property types, including smaller lots and older homes, while maximizing layout, function, and value.
Our Service
Our ADU Construction Process
A clear, guided experience — from initial consultation to completed ADU.
01
Free Consultation
We’ll review your property, learn your goals, and discuss the right ADU option for your space, budget, and long-term plans. You’ll receive a clear direction and a no-pressure estimate.
02
Design & Planning
We create a detailed ADU design tailored to your property layout and intended use. Our team also helps coordinate permits, approvals, and project scheduling.
03
Construction
Our experienced builders handle the full construction process using quality materials and proven methods. Expect clear timelines, regular updates, and consistent communication throughout the build.
04
Final Walkthrough
We review every detail with you, complete final touch-ups if needed, and make sure your ADU is finished, functional, and ready to enjoy.
Northwest Builders & Renovation. All Rights Reserved.