Seattle-Area Home Additions

As time goes on and you add to your family, you may outgrow your home you once thought was perfect size. Luckily, with an addition, you can add the square footage space you desire in order to evade the competitive real estate market and stay in the neighborhood you love dearly.

Love Your Seattle Home but Need More Room to Grow?

Do you love your Seattle home, backyard, school district, and nearby amenities but feel you need more room to grow? Then, undergoing a home addition or home renovation is a great idea. This way, you gain the extra space you need so you don’t outgrow your home and have to move down the road. Whether it’s an extra bedroom for visitors or an attic conversion, an addition can transform your entire home from top to bottom.

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Make the Most of Your Seattle Home With a Home Addition

There are several reasons why homeowners in Seattle might want to expand the size of their living space with an addition. Benefits of building a home addition on your property include:

Increased Living Space

Whether adding a whole second story, expanding a bathroom, or putting in a new office, a home addition is a great way to give yourself and your family more privacy and personal space. This is perfect for if you have a little one on the way, growing children, or a multi-generational household. Don't under estimate the value of adding extra living space!

Enhanced Functionality

Does your current home simply not cut it in the functionality department? You may need a bigger kitchen to handle all your household meals, a playroom for your kids, or an expanded living area to host holiday gatherings. No matter your exact needs or wants, a home addition is sure to make your daily activities much more comfortable and convenient.


Home additions are incredibly versatile. From a chef's kitchen with a large pantry to a home gym, home theater, or full second-story suite, you can implement whatever makes sense for your unique lifestyle.

Higher Property Value

Undertaking a home addition project is a smart investment decision. Buyers these days love space, meaning that home addition is likely to increase your overall property value significantly.

Types of Home Additions

There are numerous types of home additions available, including single-story, multi-story, and modular additions. Our team will help you explore your options and choose one that best suits your needs and budget.



Expand your home’s footprint at a reasonable cost with a main-floor master suite or kitchen addition.



Reconfigure your roof line and add windows, creating space for an additional bathroom or master suite.


Second-Story Additions

Add a partial or full second story to your home. We’ll engineer the walls and foundation to support the new floor.


Two-Story Additions

Increase space on your first floor while also adding a new second-floor master suite.

How Much Will Your Seattle Home Addition Cost?

Estimate a realistic price range for your project.

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Client-Centered Design

A home addition build on your own terms

Our team will create a master plan for your remodel that outlines the different phases of your projects as well as a preliminary timeline. We are extremely flexible and can formulate a cohesive plan for you to live in your home during your or you can opt to get it all done at once.

See Our Proven Process

Design-Build Methodology

Creating your dream space from concept to completion

As a design-build firm, CRD Design Build collaborates with you to design and construct a home addition you love. That means instead of finding contractors who can bring someone else’s design to life, you can work with us from start to finish, knowing we’ll work with the resources you have.

Before Hiring an Architect, Consider Design Build


No real stress, because they literally took care of every step. Can't say enough about their skill and professionalism."



West Seattle

Our project was on-time (to the day!) and on-budget (to the dollar!); such a relief to be able to trust a company who was doing something so enormous and important for our family!"


Erin and Mark

University District

Always professional. On time, kept to schedule to the day. Everyone was a perfectionist and the finished product shows it."




Megan, Michael, Matt . . . have been ridiculously fantastic throughout. This is our first remodel and I'm pretty sure y'all have spoiled us with how actually enjoyable it is."

Amanda and Avinash


We loved their team approach. They listened! We couldn’t be happier with how the project turned out."


Rene and Judy


THANK YOU!!! Everyone involved in our project was a delight, gracious and kind. You have a great team."


Tee, Martin, Talisker and Macallan

Magnolia, Seattle

We had heard all the horror stories about remodel projects gone wrong, but CRD delivered on-time, on-budget, and with beautiful high quality work."


Jen and Eric


They were communicative, responsive, clear, on schedule and within budget. I highly recommend CRD!"


Peter and Sasha


We can’t believe how much the remodel has changed our relationship with our house."

Benson and Lisa


Talk to One of Our Home Addition Experts About Your Project

Investing in a home addition is a smart choice for Seattle’s homeowners who enjoy their current home's location & design but simply desire more space & amenities. Fill out our online contact form to begin your home addition project and discuss design-build solutions with our contractors!


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Client For Life

Your goals & ideas every step of the way

We take the time to listen to you and understand your needs in order to share realistic project prices and timelines for the Seattle market. Then, together, we’ll collaborate on a custom design that is tailored to your lifestyle. It’s why several CRD Design Build customers are working with us on their second, third, or even fourth project!

Frequently Asked Questions About Home Additions

Do I need permits for a home addition in Seattle?

Yes, you will need a construction addition/alteration permit from the City of Seattle to start your project. As your design build contractor, we’ll apply for and obtain any necessary permits on your behalf.

How much do home additions in Seattle cost?

The cost of a home addition with CRD Design Build ranges from 375,000 to 750,000+. This includes factors such as labor, materials, flooring, tiling, and electrical, among others. However, it is crucial to note that the final cost of your project will depend on the type of addition (bump out vs. second story), square footage, design and layout, and materials used.

Make sure to check out our comprehensive pricing guide that covers the estimated price for each type of our home additions as well as information regarding financing options.

How long do home additions take?

The duration of a home addition project can vary significantly based on the size and complexities of the specific project. However, on average, a complete home addition project can take around 3-12 months to complete, smaller projects take a few weeks/months, and larger projects take up to a year. This timeline is influenced by various factors such as the design phase, permitting and zoning requirements, and the actual build itself.

How much value does a home addition add?

The value added by a home addition depends on several factors, such as the type and scale of the addition, the location of the property, and the current real estate market. According to the National Association of Realtors, “every 1,000 square feet added to your home increases its sale price by at least 30 percent.” We are more than happy to walk you through your home addition and give our professional recommendations on what is going to be the most beneficial for your situation.

How can I pay for my home addition?

There are several financing options available to homeowners considering a home addition, including cash, a home equity loan or line of credit, a personal loan, or refinancing. We recommend meeting with a financial advisor/lender to go over your budget and payment options before making a decision on whether an addition is right for you financially. You can also check out our home addition pricing guide for ballpark project prices. For a comprehensive guide about ways to finance your home remodel,visit here.

How should I prepare for my home addition?

After you sign on the dotted line, you should start to think about your project timeline. Are you going to want to complete your addition in phases so you can continue to live in your home? Or are you going to opt to get it all done at once and find other living accommodations. You should also consider the potential impact of the project on your day-to-day life, such as noise, dust, and access to the property.

Looking for Home Addition Contractors Near Me in Seattle? Contact CRD Design Build Today