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Professional Home Addition Construction Experts

All of your Home Addition Construction ideas are your own. It’s your own personal area that you may call your own. As fascinating and fulfilling as it appears to be to start from beginning and eventually achieve the ultimate aim. When it comes to your dream house aspirations, United Signature is your one-stop shop! Let us know about your project and see how we can collaborate.

We Specialize in home addition construction

We’re The Complete Home Addition Builder In The Greater Seattle Area

We are an independent home addition design and build studio. We build, install and manage your project through to completion.
If you’re looking for home addition design packages, United Signature is your one-stop-shop. Not only does our United Team play the role of house addition designer, but we also oversee any other interior design projects for an all-in-one makeover experience. We provide a full range of services, from free on-site, no-obligation measurement, and consulting through installation.

20 Years of Experience

Best Quality Products

Home Addition Construction in Seattle

More Space to Breathe

It is not always necessary to relocate to get your ideal house that perfectly matches your expanding family and lifestyle. Through our home additions packages, we can help you optimize your space with our dedicated United Team. Why settle for a new home you don’t like when you can make your current home better?

We provide a wide range of house expansion alternatives to pick from. Each form has its own set of benefits. United Signature provides seamless home additions in total harmony with the rest of your house, thanks to meticulous planning and strong attention to detail.

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 overall makeover has a finishing statement of a European Luxury Style which can be described as — productive, efficient, and beautiful. An aisle is also placed down right in the middle to give us open and welcoming vibes as a kitchen. The L-type kitchen layout is designed to be convenient with an All-purpose counter to cook and prepare. Kitchen cabinets have a softly closed feature while the backsplash is in a mosaic quart tile. The counter comes with two-sided kitchen counter for your pantry or kitchen storage. Kitchen appliances used in luxury kitchens are often high-end, long-lasting, and appealing.

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

United Signature currently offers vertical and horizontal additions. Vertical addition means we are adding a new space on top of your existing while horizontal addition means occupying the available portion around your current home.
Our united team is composed of the best professionals in each of their fields. They all can address almost anything about your home addition needs. This includes designing, rendering, construction, and more!
Yes! We know how important it is for you to achieve your dream home additions but also to ensure that the whole project is still within your budget. In United Signature, we proudly offer a financing option with Enhacify to have your easier and most affordable home addition project.
Each home addition project lasts depending on the scope of work and the size of the property. More or less, our usual project timeline takes three to six months before completion.
Yes! Our 5-year warranty is considered one of the best in the industry. The warranty covers the labor, as well as the installation of the entirety of your home addition project.

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.