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The Experts in Accessory Dwelling Unit Construction
Why Choose Puget Sound ADU Builders
Expertly Crafted ADU Housing Designed to Enhance Your Home and LifestylePuget Sound ADU Builders is a proudly independent, women-owned business in the heart of Seattle, WA. We specialize in high-quality accessory dwelling unit construction for communities across Western Washington, particularly in the Puget Sound region, helping property owners create valuable space for family members or generate rental income.
We bring your vision to life with precision, creativity, and expertise: from the initial concept to the final build, we meticulously manage every detail of your ADU project to ensure quality craftsmanship, timely delivery, and solutions tailored to your needs, which is why homeowners in throughout Washington state choose us.
Custom ADU Designs
Our architects custom design each build to fit your ADU budget and goals.
Complete Project Management
Our team handles everything from feasibility & design to permitting & construction.
High-Quality Materials
We only use premium materials and ensure the highest construction standards.
On-Time and On-Budget Delivery
We stick to your timeline and budget, with no surprises.
ADUs Increases Home Value
ADU improves functionality and indoor space.
Our ADU Home Solutions
What Services We Offer You
At Puget Sound ADU Builders, we specialize in creating custom spaces that enhance the functionality and beauty of your home. Whether you're looking to build an ADU to transform unused areas into livable spaces or add luxury features to your property, our expert team is here to help.
Accessory Dwelling Unit Construction
We have years of experience doing the actual accessory dwelling unit construction, so we know how to get things started and overcoming obstacles on the way.
Pre-Approved ADU
Quickly add living space in your property with pre approved ADU plans. We do construction of permit ready ADUs and have experience in quick permitting of these ADUs in cities and counties across Washington state.
ADU Feasibility
With a feasibility study, you can know important things like what size that will fit your property, or what design is suited to your needs. Most importantly, you will know how much it costs to build an ADU in your property without guesswork. We have lots of experience building and permitting ADUs in several cities and counties in Washington state, which will prove valuable if you need to know if ADUs is feasible in your property.
Interior Design
We are a firm believer that ADU interior designs should satisfy the needs and lifestyles of the occupants. Our company plans and executes interior design for ADUs and tiny homes. Do you prefer your ADUs to have unique finishes and special lighting, or stick to Modern, Minimalist, or Craftsman-inspired interiors. We even have wheelchair accessible designs.
Architectural Design
We believe that ADUs and tiny homes should look good in real life and on paper, so we do architectural design with our offerings. We offer exterior designing, planning, and landscaping. Feel free to take a look at our predesigned ADU floor plans below. We also offer custom designs to serve your needs and lifestyles.
Condoization
Puget Sound ADU Builders helps you transform your property with our expert condoization services. We guide you through the entire process, from planning to conversion, maximizing your investment potential while ensuring compliance with local regulations. Unlock new revenue streams and enhance your property’s value.
Garage Conversion
Transform your existing garage into a fully functional living space with Puget Sound ADU Builders's garage conversion services. Whether you're looking to add a new bedroom, a stylish home office, or an extra entertainment area, our expert team will convert your garage into a space that perfectly suits your needs.
Attached ADU
An attached ADU from Puget Sound ADU Builders maximizes your existing footprint, adding valuable living space while enhancing your home's overall design. Ideal for in-law suites, guest quarters, or rental properties connected to your primary residence, our attached ADUs offer seamless integration.
Detached ADU
Maximize your property's potential with a well-built DADU by Puget Sound ADU Builders. Add rental income, create a private guest house, provide multigenerational living space, or design a dedicated home office. Our comprehensive ADU services ensure a seamless process, from concept to completion.
Our Remodels
Transform Your Space
Unlock the full potential of your property with a custom-designed Accessory Dwelling Unit (ADU). Whether you're dreaming of a cozy backyard retreat, a modern home office, a rental income opportunity, or a welcoming space for loved ones, our expert team at Puget Sound ADU Builders brings your vision to life.
Multi-Family Projects
Shaping the Future of Multi-Family Living
From single ADUs to duplexes, townhomes and flexible multi-unit properties, we design spaces that feel like home while working hard behind the scenes. Our team focuses on smart floor plans, durable materials, and future proofing features.We help you optimize your existing sites so each unit is comfortable, functional, and ready for long-term performance, whether it be for multi-generational housing or investment purposes. At PSAB you will find thoughtful layouts that maximize comfort and rentable square footage, cost-effective construction strategies without sacrificing quality & proven experience navigating codes, permitting, and multi-family design challenges.
- Efficient designs tailored for modern living
- Cost-effective solutions with lasting quality
- Trusted expertise in multi-family development
Financing Option
Flexible Financing Options for Your ADU Project
At Puget Sound ADU Builders, we make it easy to turn your vision into reality with various financing options. Whether you’re looking for a Home Equity Line of Credit (HELOC), cash-out refinancing, or other flexible solutions, our financing partners are here to help.
Home Equity Line of Credit (HELOC)
ADU Bridge Loan
Cash-Out Refinance
Renovation or Construction Loan
Alternative Financing Options
How It Works
Your Journey with Us
At Puget Sound ADU Builders, we simplify the ADU creation process by combining innovative construction techniques with smart design solutions. Our step-by-step approach ensures that every ADU is customized to your needs and completed with precision. Here’s how we do it:
Property Evaluation
Schedule a consultation with our ADU Specialists to assess your property and determine the feasibility and best options for your ADU. We’ll provide pricing estimates and a roadmap to getting started on your ADU journey.
Design Customization
Work closely with our expert designers to bring your vision to life. We’ll customize every aspect of your ADU, ensuring it fits your lifestyle and property perfectly. From layout to finishes, your ADU will be uniquely yours.
Permit Process
Our dedicated permit team handles all the paperwork and submissions, ensuring that your plans meet local regulations. We manage the entire permit process to get your project approved and ready to build without unnecessary delays.
Efficient Construction
Once the permits are in place, our skilled builders begin the construction process. From laying the foundation to adding the final details, we oversee every phase of the build to ensure timely, efficient progress while maintaining the highest standards of quality.
Final Walkthrough
We’ll walk you through your new Puget Sound ADU Builders ADU when construction is complete. Together, we’ll inspect every detail to ensure the finished product meets your expectations and is ready to be enjoyed.
Testimonial
Read What Our ADU Customers Are Saying
Hear from homeowners who transformed their properties with our ADU solutions. Our clients love the quality, craftsmanship, and seamless process we provide. Let their experiences inspire your own ADU journey.
Erlynn Legaspi
Our Client
“We had a truly positive experience working with PS ADU Builders. From the very beginning, David, our ADU specialist, has been always responsive, very professional, and proactive in guiding us through the process. He and Tanya really took the time to answer our questions, explain each step clearly, and provide thoughtful insights that helped us better understand what to expect.
We especially appreciated their
patience and willingness to work with us as we explored different options. At every stage, we felt supported and well-informed, which made a big difference as we navigated important decisions.
Although we ultimately decided not to move forward with the project at this time, we are very grateful for their time, expertise, and genuine care. Overall, it was a great experience, and we would not hesitate to recommend them to others considering an ADU project.”
Ray Spaulding
Our Client
“Called in to learn more about ADUs, and received prompt and excellent service from PSAB staff!”
Nina Bautista
Our Client
“Great team and great process. Communication has been super consistent. We’re excited for our new space.”
Charming Njikam
Our Client
“Puget Sound ADU Builders is truly the best. They are so friendly and made the entire process stress free! I’m so happy with the way our vision is coming along.”
Colin Greene
Our Client
“If you are looking for an ADU builder in the PNW that you can actually trust, look no further than Puget Sound ADU Builders. Their team is incredibly knowledgeable and truly understands the complex permitting and design landscape of the area. I found them through their social media, and I have to say, their posts are not only enjoyable to watch but also very educational. It’s clear they take immense pride in their craftsmanship. I’m confident they are building some of the highest-quality ADUs on the market today!”
Julianna Tijerina
Our Client
“Puget Sound ADU builders is my favorite! Super responsive, they answer me quickly and clearly which made me feel more confident with moving forward with my project!”
Tyler Saathoff
Our Client
“Great people, great service and exceptionally easy to work with. Response time were fast with high quality correspondence following.”
Kevin Craig
Our Client
“Amazing team and an amazing product! If you are looking for custom ADUs, this is the one.”
Jessica Charlesworth
Our Client
“Working with Tanya Mills and the team at Puget Sound ADU Builders is a breath of fresh air. Tanya is an exceptional leader who genuinely puts her clients first. She takes the time to ensure each project is feasible, aligns with the client’s goals, and is grounded in smart, informed decisions.
Her General Contractor, Morgan, brings a wealth of knowledge and adds significant experience when it comes to the construction process. Together, they make an unbeatable team, deeply informed, trustworthy, and easy to work with.
Tanya is embedded in the community and leads with integrity. I wouldn’t hesitate for a second to refer anyone to her. She and her team deliver every time.”
Nichole Earle
Our Client
“Tanya is truly an incredible businesswoman and an outstanding builder. Her professionalism and expertise shine through in every project she takes on, and her commitment to quality is unmatched. She goes above and beyond for her clients, making sure every detail is perfect. If you’re looking for someone you can trust to build your tiny home, you simply won’t find anyone better than Tanya!”
Brody Boston
Our Client
“I highly recommend the PSAB team! Quality builders who are attentive, responsive, and truly care about smaller projects are hard to find. Thank you, Puget Sound ADU Builders!”
Jon Waldie
Our Client
“Went to see their work product and was duly impressed. Great service, beautiful tiny home options. Reccomend you make an appointment, you wont be disappointed”
Zach Donati
Our Client
“Best tiny home place they did great on our tiny home we are so happy they made it for us . Everything is perfect with it and we couldn’t be
Our Projects
Our Predesigned ADU Floor Plans
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FAQ
Get Answers to Common ADU Questions
Are your projects insured, and do you offer warranties?
Yes, Puget Sound ADU Builders is fully insured, and we offer warranties on all workmanship for your peace of mind.
How long does it take to build an ADU?
The timeline for building an ADU depends on its size and complexity. On average, the process from permits to completion takes 6 to 12 months. We provide a detailed timeline once your design is finalized.
Do I need permits to build an ADU?
Yes, all ADUs, including conversions, require permits. But don’t worry—we handle the entire permitting process for you, making it as easy and stress-free as possible.
Can I convert my garage into an ADU?
Absolutely! You can convert your garage into an ADU. Depending on local regulations, you could potentially have two ADUs on your property, plus a garage conversion, offering multiple living or rental spaces.
Get In Touch With Us Now
Need Help Choosing the Perfect Plan?
Have a Custom Idea in Mind?
Our experts are here to guide you every step of the way—whether you’re choosing from our predesigned plans or looking for something custom.
Latest Blog & News
Stay Informed with the Latest ADU Trends and Insights
Explore expert advice, client stories, and tips to make the most of your ADU project.
In our previous articles, we shared what HB 1345 is and some of the factors that may affect whether a rural property qualifies for an ADU. But for many homeowners, the bigger question isn’t whether they can build an ADU. It’s why they would. For some families, the answer has nothing to do with rental […]
In our previous article, we discussed how HB 1345 created new opportunities for certain rural property owners to build detached ADUs outside Urban Growth Areas. Naturally, the next question is: “Does my property qualify?” While HB 1345 may create new opportunities for rural property owners, there is one important thing to understand: The law creates […]
A New Opportunity for Rural Property Owners in Washington For many rural property owners, the challenge was never a lack of space. It was a lack of options. You may have had the acreage, the family need, or even the long-term plan for an additional home, but local regulations often limited what could be built […]