Seattle Home Additions

Improve quality of life and the value of your home.

Do you love your Seattle home, but long for more space?

A thoughtful home addition can preserve the character of your house while improving your life and expanding the space to your home. Since our founding in 2010 we’ve completed hundreds of room additions and home renovation projects, including story additions, remodeling basements, and transforming existing space by expanding the footprint of many classic Seattle homes.

Tell Us About Your Project

While Seattle has a range of architecturally diverse neighborhoods, many of our charming, older homes were originally built with only one bathroom, a small front porch, or a cramped kitchen. We have built our careers working on these homes.

Our team works closely with Seattle families to explore their options for expanding your home’s footprint, adding new space, or redesigning your existing space to better suit your modern lifestyle.

We help our Seattle clients weigh the pros and cons of building an addition, balancing the cost of excavation, likely return on investment, and the zoning and foundation limitations on your property, with the dream of maximizing your space to bring out the true potential of the older home that your family has fallen in love with.

Let’s see recent projects…

Additions Showcase

Explore Additions

Magnolia Dormer Addition

Sunset Hill Siding and Sunroom

Wallingford Dormer Addition

Cherry Hill Crawlspace Dig Out and Basement Addition

Magnolia Tudor Addition and Remodel

Magnolia Attic Conversion

Loyal Heights Addition & Remodel

Ravenna Addition and Basement Remodel

Phinney Ridge Kitchen

Magnolia Addition & Kitchen Remodel

Greenwood Two-Story Addition

Green Lake Addition and Bathroom Remodel

Ballard Addition & Kitchen Remodel

Second Story Additions in Seattle, WA

Adding a second story is the homeowner’s dream for many Seattle families. We help our clients escape the space limitations and zoning issues inherent in a smaller lot by building up instead of out. We’ve worked with clients to create second-story primary bedroom suites, sunny home offices, and even game rooms. Adding a second story can significantly increase the value of your home.

Home Office Additions

Room additions have grown in popularity as more and more people find themselves working from home. Where it’s practical to expand the home’s footprint by adding square footage, a dedicated home office addition can provide new space for comforts, privacy and technological innovation while eliminating the stress of a rush-hour commute. Work with our design team or your own architect to envision the perfect layout for your work style.

Bathroom or Kitchen Additions

The need for an addition sometimes begins with a focus on the essentials. But a grand, new kitchen can also be more than a practical solution for an overcrowded resource – it can become your favorite part of the house. A place that makes you smile. And when it comes to the bathroom, we’ve seen how a home with just one can create a morning traffic jam. With a bathroom addition you can also add new features, such as a bigger shower, sink, spa or laundry room.

Home Addition FAQs

How much does it cost to build a new house in Seattle?

There are many different factors that go into determining the overall cost of building a new home or addition in Seattle:
Permits—The fees can vary based on the type of city permit.
Financing—If you plan on financing the project through a bank, you’ll have financing costs.
Design—Work with our experienced in-house design team or bring your architect. Our process is designed to ensure continuity and keep everything running smoothly.
Sitework—Sitework consists of the costs that go into preparing your site for construction, including utilities, sewer, and landscaping.
Materials—Do you want custom features on your addition? The materials you choose can affect the overall cost of the project.
Construction Costs—The overall construction costs of building the addition.
Before your project begins, we’ll have an exact budget and you’ll have a chance to sign off on everything. The best way to determine how much a new addition to your Seattle home will cost is to contact us, and we’ll send one of our expert craftspeople to meet with you at your home – or conduct a detailed video chat – to learn more about your project. Our goal is to provide an accurate ballpark budget as early as possible, refine it with you as the designs are finalized, and finally, agree upon a detailed and accurate quote that fits your budget goals.

How does the average home addition project take to complete in Seattle?

Depending on the project’s scope, it can take between three to eight months to complete a home addition project in Seattle. Many factors can increase the overall length of time it takes:
• Severe weather
• Mid-project changes to the scope by the client
• Material availability (rare materials vs. common ones)
• Permits
We work closely with our clients to keep them informed at every step of the project. This constant communication will provide you with peace of mind knowing that we’re micro-managing every aspect of the project until completion.

Is it better to add on or build a new house?

The answer to this question depends upon what you want to accomplish and the amount of space you have on your property. For example, if you want to add a DADU, you will need a certain amount of property space. The best way to determine if it’s better to add on or completely rebuild your whole home (which we can do) is to schedule a consultation, and and we’ll speak with you about your options and help plan next steps.

Are home additions worth it?

Yes, a home addition is definitely worth it. In addition to increasing your home’s overall value, a room addition will provide you with increased living space and quality of life.

There are many different types of home additions:
• Second Floor Addition
• First Floor Addition
• Basement Remodel
• Whole House Renovation
• Detached Accessory Dwelling Unit

Each type of addition has its own unique advantages. For example, if you have elderly relatives living with you, a first-floor addition will prevent them from having to walk up and down the stairs. Conversely, a second-floor addition works great for homes on small lots or if you want to separate your sleeping from living area.

Can you make additions in phases?

We work closely with our clients to accommodate their schedules. For example, when the kids are out of school or want to take a vacation and come home to your new addition.

Finding a Contractor to Add Space to Your Home

Harjo Construction has completed hundreds of projects in Seattle since 2010. We’ve helped countless Seattle homeowners realize their dreams with their home addition projects.

Although we routinely work on projects created by architects or designers for all magnitude of residential projects, we also offer in-house design services for all magnitudes of residential projects.

If you’re ready to speak to someone about your project or have any questions about adding an addition to your Seattle home, contact us or call at: 206.909.6312.

We’ve spent our lifetimes in the construction industry and built a company culture focused on honesty and integrity in craftsmanship. Over the course of your construction project, you’ll appreciate our consistently high level of communication and you’ll feel empowered in regular, weekly calls to talk about your project.

Our proven process reduces stress and accounts for every detail, from concept and design through preconstruction and construction, until the day you move in to your new space and beyond.

Call us today. Let’s talk about your project.

Let’s get started

We’ll guide you through the whole process.
We offer virtual consultations to discuss home visits, preconstruction planning, and design.

Tell Us About Your Project