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As a leading custom ADU builder, we ensure your ADU building project is handled with expertise.

ADU BUILDERS IN SEATTLE, WA | ADU CONSTRUCTION COMPANY

6 Months of Interest-Free Financing

Licensed & Insured

Over 100 5-Star Reviews

Complete Custom Room Design

20+ Years of Experience

Family-Owned & Operated

Discounted Prices

Call (206) 428-6974 for a free estimate.
UP TO 15% OFF
MOST PROJECTS
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Seeking a reputable Seattle ADU contractor for your home expansion? We offer ADU building services for your home construction.

What sets us apart:

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What Does an ADU Service Entail?

Our Guarantee

No matter what project, promise you will be 100% satisfied.

Our Promise

We will always treat you like family & answer any questions for you.

Our Quality

We only use trusted & certified suppliers for any of our projects.

An ADU service involves adding a small, separate living area to your property, commonly known as an accessory dwelling unit (ADU). This can be a backyard cottage or a converted space within your home. If you're in Seattle, Washington, hiring a company specializing in ADU construction, like Keystone Remodeling, is your first step.

Here's what to expect during the service:

  1. Consultation: The builder will meet with you to understand your needs, available space, and what you envision for your ADU design. This is where you discuss whether you want a cozy backyard cottage or another living area.

  2. Design: Next, the company will create a custom ADU design that fits your property and meets your requirements. They'll ensure it complements your existing home while providing a functional living space.

  3. Permitting: Before building can start, the builder will handle the necessary permits. This is crucial in Seattle, Washington, where regulations must be followed to build an ADU.

  4. Construction: With permits in hand, the ADU construction begins. The company will build your ADU from the ground up or convert an existing structure, focusing on quality and efficiency.

  5. Final Touches: After the building is complete, the builder adds the final touches to make the space comfortable and inviting.

An ADU service takes you from concept to completion, adding valuable living space to your homes with a seamless process.

When to Hire ADU Builders in Seattle

When considering adding an accessory dwelling unit (ADU) to your property in Seattle, it's important to know when to hire ADU builders. Here's a detailed guide on when to make that call:

  • Space Needs Change: If your family is growing or you need more room but don't want to move, consider an ADU. An ADU can add that extra living space without the hassle of buying a new home.
     

  • Looking for Rental Income: When you're interested in generating extra income, hiring builders to construct a detached auxiliary dwelling or a backyard cottage can be a smart move. This space can be rented out to help with mortgage payments or as an investment.
     

  • Aging Family Members: An ADU can provide a perfect solution if you have aging family members who need to be close but require their own space. It allows for independence while keeping family nearby.
     

  • Home Office or Studio: With more people working from home, having a dedicated space that's separate from the main single-family dwelling can boost productivity. An ADU can serve as an office, studio, or creative space.
     

  • Long-Term Guests: An ADU offers a comfortable and private accommodation option for homeowners who frequently host long-term guests.
     

  • Increasing Property Value: If you're looking to increase your property's value, adding a built ADU is a proven way. It adds square footage and appeals to potential buyers who see the income-generating potential.
     

Hiring ADU builders in Seattle becomes essential when these needs arise, ensuring that your new space is well-designed, compliant with local regulations, and adds value to your property.

Professional ADU Services in Seattle 

Discover the ultimate solution to expanding your living space with our ADU services in Seattle. Imagine adding an accessory dwelling unit, a detached auxiliary dwelling, or extra square footage to your single-family dwelling without the financial strain. With our six months of interest-free financing, making your dream space a reality has never been easier.

We are a licensed and insured company trusted by homeowners across Seattle. Our reputation speaks volumes, with over a hundred 5-star reviews from satisfied customers who've seen their homes transformed. Whether you're looking to build a backyard cottage, a cozy space for family, or a short-term rental unit, we have the expertise to bring your vision to life.

Our services are not just about adding space but about enhancing your home's value and functionality. Every accessory dwelling unit we've built is a testament to our commitment to quality and customer satisfaction. We understand the unique needs of Seattle homeowners and tailor our services to meet these demands, ensuring that every project is completed to the highest standards.

Moreover, our partnership with leading suppliers allows us to offer these services at discounted prices. This means that when you choose us for your ADU project, you're getting top-notch service and saving hundreds to thousands of dollars. It's a win-win situation that our customers greatly appreciate.

Choosing us for your ADU needs means entrusting your home to experts who care about delivering value and excellence. Let us help you expand your living area, enhance your property's appeal, and enjoy the benefits of having an additional, well-built living space. Contact us today, and let's make your ADU project in Seattle a resounding success.

Our Guarantee

No matter what project, promise you will be 100% satisfied.

Our Promise

We will always treat you like family & answer any questions for you.

Our Quality

We only use trusted & certified suppliers for any of our projects.

Consultation • Design • Build

Thinking Of Ways To Expand The Quality & Sqft Of Your Home?

ADUs are a great way to do just that! They offer all the benefits of traditional home expansion without many drawbacks. ADUs can be used for various purposes, including as an office, studio, or guest room. And because they're separate from the main house, you can still live in your home while renting out the ADU. We'll take care of everything for you so that you can enjoy your new space as soon as possible.

Gym, Home Office, Short-term Rental, & More...

Thinking of ways you can make your extra living space into something more useful?


ADU conversions are a great way to use all that extra space in your home. You can turn your additional space into a gym, office, or rental unit – endless possibilities! With an ADU conversion, you can have the extra living space you’ve always wanted without moving. Plus, you’ll be able to customize it exactly how you want it – so it feels like an extension of your home.

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Finance Your ADU Building Project With Us

Introducing our new finance options for your ADU conversion projects!

We understand that undertaking an ADU conversion can be a big investment. That's why we're excited to offer several financing options to help make your new livable space a reality.

Our no-interest, no-payment plans make it easy to budget for your project. Our low-payment, low-interest rate options are ideal for those who want to spread the cost of their project over time.

So whether you want to update your powder room or create a luxurious master suite, we have a financing option that will work for you. Contact us today to learn more!

3D & 2D Designs For Your Accessory Dwelling Unit

Have you ever wanted a spacious home office? Or maybe something more subtle? No Problem! Our designers will design your exquisite ADU according to your needs and budget. At Keystone Remodeling, our commitment is to your satisfaction.

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YOUR ADU CONSTRUCTION PROCESS WITH US

GOALS

When you tell us your dream ADU Conversion concept, we develop a step-by-step plan for reaching the goal using our certified and insured builders.

DESIGNS

We are excited to get started on your project! We will start with the design that meets all of our requests; once approved, we'll move into the final step.

EXECUTION

We understand the need to ensure our products meet all your expectations. That is why we provide a guaranteed end result that meets every requirement and expectation!

QUALITY

We understand that an ADU conversion can be the most expensive project in your home, so we strive to provide you with high-quality craftsmanship. Keystone Remodeling takes great pride in partnering with the best and finest paving manufacturers. This partnership is highly beneficial to our customers because of the discounted price we are getting from them, a discount automatically passed on to our customers, saving them hundreds and even thousands of dollars per project. The same goes for our synthetic turf suppliers and all pool tile, plaster, and pebbles.

Partners.

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Keystone remodeling takes great pride in partnering with the best and finest paving manufacturers. This partnership is highly beneficial to our customers
because of the discounted price that we are getting from them. A discount that is automatically passed on to our customers saving them hundreds and even thousands of dollars per project. The same goes for our synthetic turf suppliers and all pool tile, plaster, and pebbles.

What Our NEIGHBORS Say

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