Contact Us
Instagram Pinterest Youtube Linkedin
Contact Us

Trusted ADU Contractors in The Greater Seattle Area

The expert craftsmen at United Signature are here to help design and construct the perfect ADU for your property, budget, and intended use.
  • All Fixtures, materials, and labor included
  • built by a local, vetted contractor
  • 5-6 Weeks Average Time to Complete
Start Your ADU Build

Innovative Solutions for Expanding Your Space: The Rise of ADUs and DADUs in Seattle

The rising costs of living, increase in population, and recent home improvement trends are inspiring more Seattle homeowners to think creatively about expanding their living spaces. That’s where ADUs and DADUs come in. Accessory Dwelling Units (ADUs) and Detached Accessory Dwelling Units (DADUs) are innovative solutions for adding extra space to your property. These additions can accommodate family, friends, and house guests or serve as dedicated areas for an office or entertainment. Additionally, they offer the opportunity to generate rental income on the side, providing a valuable return on your investment.

Contact Us

What is an ADU?

An ADU stands for Accessory Dwelling Unit, a secondary living unit located within a single-family residential lot. They allow you to create separate living rooms, entertainment areas, or workspaces within your existing property, all with their own entrance. This flexible option helps maximize the use of space without the need for major construction, significant land expansions, or a big move.

What Is a DADU?

Detached Accessory Dwelling Units (D.A.D.U.s) take this concept further by offering an entirely separate living area on your property. These self-contained units offer privacy and independence, making them perfect for multi-generational families, rental income opportunities, or serene getaways.

Discover the Benefits of ADUs & DADUs

ADUs and DADus offer many benefits, including:

Bonus Space

They provide additional square footage versatile enough to be created into an office, home gym, entertainment center, playroom, studio, or anything in between! The options are truly limitless.

Additional Rental Income

You can generate extra income by renting out your ADUs or DADU, maximizing the value of your property, and recouping back your investment.

Multigenerational Living

ADUs and DADUs are ideal for accommodating grandparents, extended family who are visiting, or college-aged children. Everyone is able to have their own space and privacy away from the main residence.
Contact Us

Expert ADU Contractors in the Greater Seattle Area

At United Signature, we specialize in turning your ADU and DADU visions into reality. Our experienced team expertly handles every aspect of your project, from initial design through permitting and construction. We work closely with you to craft personalized designs that not only meet your specific needs but also reflect your unique style.

Our commitment to exceptional standards and unmatched quality ensures that every detail is meticulously managed. We guide you through the design process, helping you select the best options to maximize functionality and aesthetic appeal. Our team navigates the permitting process efficiently so you can focus on your vision without worrying about bureaucratic hurdles. From conception to completion, we’re dedicated to delivering a finished product that exceeds your expectations and enhances your property’s value and functionality.

What’s Included in Our ADU Construction Services

Design Consultation

You’ll work with our expert team of designers and builders to craft custom design plans for your ADU or DADU.

Professional Workmanship

Our ADU construction process is meticulously executed by seasoned professionals to ensure flawless results.

Genuine Materials

We prioritize both durability and aesthetics by selecting only the finest genuine materials from top vendors and manufacturers.

Project Management

Efficient project management is at the heart of our approach. This allows us to complete your ADU project on time and within budget.

Customer Satisfaction

Your satisfaction is our top priority. We are committed to providing ongoing support throughout every phase of the project.

Permitting and Compliance

We handle all aspects of permitting and regulatory compliance to ensure your ADU meets local codes and standards.
Contact Us

Calculate The Cost of Your ADU or DADU Instantly!

Curious about the cost of your ADU project? Use our easy-to-navigate cost calculator to get a detailed estimate tailored to your needs. Visit Studio Shed’s Project Cost Calculator to explore pricing options and budget effectively for your dream ADU.
Calculate my cost

Check Out Our ADU Builds

Explore our portfolio of ADU’s and DADU’s
View More

Hear What Client’s Have To Say About Working With Us

Frequently Asked Questions About ADU Construction

There are many different cost factors when building an ADU, including the size of the build, the plumbing and electrical work needed, and the desired materials and finishes. For a more in-depth cost breakdown and a more accurate quote, please call or message us regarding an ADU construction estimate.
ADU stands for Accessory Dwelling Unit. It is a second structure on a property that can be used as a separate home, including bedrooms, bathrooms, and a kitchen.
There are three general types of ADUs. They include Detached, Attached, and Garage ADUs. The detached unit is not attached to the home and is its own free-standing unit. Attached is integrated into the existing structure of your home, sharing a wall with the primary residence. A Garage
ADU can typically be found in the backyard, but for some limited spaces, you can build it as an extension to the upper part of your home.
In Washington State, the size of an ADU (Accessory Dwelling Unit) can vary based on local regulations. In Seattle, ADUs can be up to 1,000 square feet if detached and 1,200 square feet if attached.
If you’re thinking about building an ADU, start by reaching out to United Signature by calling (206) 567-7540 or filling out our contact form. Our team will guide you through every step of the process, from initial planning and design to final construction. We’ll help you understand your options, navigate zoning regulations, and create a customized plan that fits your needs and budget. Reach out today!
Contact Us

Check Out Our Blog

Dive into our blog for insights, trends, and expert advice on home remodeling and ADU/DADU construction.
See All Posts

Unlock Inspiration for Your Next ADU or DADU Build

Here are just a few examples of our beautifully crafted ADU and DADU builds in the Seattle Area.
View More Inspiration

Let’s Build Your Dream Space - Contact Us For ADU Construction in The Seattle Area.

By choosing United Signature, you’re selecting a company dedicated to honoring your vision and enhancing the value of your property. Whether you’re planning an ADU or DADU, we ensure that both form and function are seamlessly integrated into your design.

Contact us today to discover how we can transform your dream project into a stunning reality.


We are an independent design and build studio. We build, install and manage projects to completion. We offer a complete remodeling service, from Free on-site, no-obligation measuring and consultation to installation.

Services

Explore

You Can Find Us Here

Everett, WA
1010 SE Everett Mall Way
#102 Everett,
WA 98208

Tacoma, WA
2302 A St.
Tacoma, WA 98402

©2024 United Signature | Web Design by Integrity Marketing