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Trusted ADU Construction Experts

At United Signature, we have the knowledge and experience to walk you through all of the criteria, alternatives, and options, allowing you to construct the ADU that is right for your property, budget, and intended use without any worry! With the best home remodeler in the Metro Seattle Area, your ADU construction is guaranteed to receive the best services and quality offerings!

We Specialize in Accessory Dwelling Unit CONStruction

ADU Construction Experts in the Greater Seattle Area

We are an independent accessory dwelling unit design and build studio. We build, install and manage your project through to completion.
We provide ADU Construction service packages to help you establish a compelling design. Our expert, competent remodelers and designers will make this a painless procedure. Take advantage of our 100% all-inclusive free consultation and estimate service. Let’s get started on designing your dream house together!

20 Years of Experience

Best Quality Products

ADU Construction Remodeling in Seattle

More Spaces, More Memories!

What can you do when your loved one needs a place to stay? You provide a resting spot for them. And when they’re in need of a home, you do all you can to help them find one.

That is why, in the Greater Seattle area, investing in Accessory Dwelling Units as a cost-effective, practical housing alternative may help your loved ones thrive. It pays to plan ahead if you want to create an auxiliary dwelling unit. Plus, it can also create a rental income for your family, a side income.

Our United team will work hand in hand with you from the consultation to the completion of your dream house. Here at United Signature, we design and create everything you can envision when it comes to ADU Construction.

Visit Us

Visit us in our office at:
1010 SE Everett Mall Way, #102 Everett, WA 98208

2302 A St, Tacoma, WA 98402

Email Us

Send us an email to and we’ll answer you shortly.

Contact us now!

You are on the way to the easiest renovation ever! Tell us anything you want to know, and we’ll find the best price for you at United Signature.

Watch Our Recent Project

The sleek design of this kitchen provides an open area. This L-shape kitchen with an island in the middle provides room for cooking, eating, and socializing. The hardwood floor provides a warm feel to the home.

Our Work

Discover what clients were able to achieve with us.

Your All-Inclusive Package

We’ve sourced the industry’s top designers and builders to unify all aspects of a project into
simple, affordable bespoke renovations.

Our certified team will deliver you kitchen floor plans, detailed elevations, hardware fittings and fixtures, and a complete material and color specification schedule.

No-one likes nasty surprises. We provide upfront transparent pricing to include a simple supply and install, or full project management including all the trades work. We offer a high range of specifications for a variety of budgets.

We have sourced the best products both globally and locally. Our local craftsmen will ensure your new kitchen is installed to perfection. We offer a 1-year installation guarantee and an additional guarantee depending on the product supplier ranging from 1 to 5 years.

Our average lead time is 6-8 weeks. Expect to be without a functioning kitchen for up to 2 weeks. Kitchen demolition and installation are 2-3 days, the countertop will take another 5-7 days to check measure and install. If you need a kitchen installed sooner, please speak to us directly about our express service.

Your designer will be with you from start to finish for your Signature installation. We offer a variety of management options; design only, to supply and install, to a full-service approach. We are happy to work with your builder or to share our trusted network with you.

We Design It.
We Build It.
You Love It.

Our established design-build technique eliminates the hassles, headaches, and disappointment associated with home remodeling projects. From beginning to end, we do everything: design, build, project management, and so much more. At United Signature, your build is in good hands. We take the burden off of your shoulders so that your build can be the way it’s SUPPOSED to be: enjoyable.

start a conversation

Tell us everything about your remodeling plans and enjoy the benefits of a 100% free consultation and project estimation!


With the details at hand from your construction goals, our creative designers will create a clear vision of the proposed design and scope of work.


A weekly progress report on all on-going projects throughout the construction days will be given to you to provide peace of mind.


Have a blast on your long waited construction journey. You will be assisted throughout your home to ensure that everything that you want is in place.


Common Asked Questions

There are many different cost factors when building an ADU, including the size of the property, the plumbing and electrical work needed, and the desired material for 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 ADU’s. They include Detached, Attached, and Garage ADU’s.
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.
Where do I start if I want to consider building an ADU?

Financing Available

We know that one of the most important factors when doing a home remodel is budget, which is why United Signature offers financing options with Enhancify. Now it’s easier and more affordable to remodel your home, bathroom, kitchen, etc. Reserve your consultation today and we will be happy to help you find the best program for you!

Our Partners

Start Your Dream Renovation

Bespoke kitchen designs and installations are our specialties. We define ourselves through clever conceptual and space planning, material innovation, and attention to detail. We have partnered with the highest quality local manufacturers to ensure your design is bought to life.

We supply a 5-year warranty on all cabinetry, door panels, and hardware. Our 1-year installation guarantee provides adequate time for your kitchen to settle in for the best fit.

There’s nothing more satisfying than your own sparkling new kitchen. It’s the centerpiece of your home that brings people together for good food, drinks, and conversation. Being one of the few kitchen companies in Washington that offers a service guarantee on our kitchen renovations, we are happy to work with you to meet your initial expectations.

Search the web and you will find outstanding 5-star reviews across many different 3rd party sites including Houzz, Google Reviews, Facebook, and Product Reviews.

They won’t create just any kitchen, but a work of art for you to enjoy with your loved ones.

We are in a constant quest to find the best quality hardware and the latest materials globally. Your new kitchen will be a timeless masterpiece made of the finest ingredients.

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Get Inspired

Here are just a few of our beautifully crafted, inspirational kitchen and bathroom works of art.