Home Additions Seattle

Home Additions Seattle Expand Your living Space with Evergreen Remodelers

Feeling cramped in your current home but don’t want to move? A home addition might be the perfect solution to give you the space you need while staying in the neighborhood you love. At Evergreen Remodelers, we specialize in custom home additions in Seattle, whether you need an extra bedroom, a larger kitchen, or a second story. Our expert team will guide you through the home addition process, from initial design to construction, ensuring your new space seamlessly integrates with your existing home.

Our Home Additions Projects

The Benefits of Home Additions

Adding onto your home is a practical way to increase both space and property value. A well-designed home addition can make your house more attractive to future buyers while giving you room to grow. Whether it’s an extra bedroom, bathroom, or a new home office, custom additions offer the flexibility to create a space that fits your unique needs and lifestyle.

Beyond boosting value, home additions help you avoid the stress and high costs of moving. You can stay in the neighborhood you love while expanding your living space to suit your growing family or changing priorities. With the right design, additions like kitchens, bathrooms, or bonus rooms can dramatically improve your home’s functionality and overall comfort.

Our Home Addition Services

Second Story Additions

If you’re looking to maximize your Seattle home’s space without sacrificing your yard, a second-story addition is a fantastic option. Whether you need additional bedrooms, a master suite, or a multipurpose space, we can design and build the perfect addition to meet your needs.

Expanding Your Kitchen or Bathroom

Many homes in Seattle have smaller kitchens or bathrooms. If you need more room for your growing family, we can expand your kitchen or add a bathroom to increase the functionality and comfort of your home. Whether you’re looking for a more open-concept design or extra storage, we’ve got you covered.

Garage Conversions and Additions

If you no longer need a garage, consider converting it into livable space such as a home office, guest room, or family room. If you still need the garage but want more space, we also specialize in garage additions to expand your existing structure.

Basement and Attic Conversions

Transform your basement or attic into a functional living area. Whether you want an extra bedroom, home office, or family room, we can convert underused spaces into areas that add value to your home. Our team ensures that all conversions meet local building codes and regulations.

Room Additions

A room addition is a great way to expand your living space. From extra bedrooms to sunrooms and home offices, we handle the design and construction of custom room additions that integrate seamlessly with your existing home.

Outdoor Room Additions

Looking to expand your living space outdoors? We can create outdoor rooms, including patios, decks, and outdoor kitchens, giving you more room to entertain or relax in the fresh air.

Add More Living Space Without Leaving Home

If you love where you live but need more room, a home addition is a smart solution. Whether your family is growing or your lifestyle has changed, expanding your home allows you to stay in the neighborhood you love while gaining the space you need. From second-story additions to expanded kitchens or new suites, the right solution depends on your lot size, budget, and goals.

Our design-build team takes a thoughtful approach to every project. We’ll help you explore layout options, navigate zoning requirements, and choose an addition that fits your home’s style and structure. With expert guidance from our Client Services team, we’ll make sure your new space is both functional and beautifully integrated with the rest of your home.

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Why Choose Evergreen Remodelers for Your Home Additions?

At Evergreen Remodelers, we understand that your home is your sanctuary. With years of experience in home addition construction, we provide:

Custom Design and Build: Whether you’re adding a master suite or creating a more spacious living room, we work with you to design and build an addition that fits your lifestyle.
Flexible Home Expansion Solutions: From garage conversions to basement additions, we offer multiple solutions to meet your needs and budget.
Efficient Project Management: We handle everything from home addition permits to construction and installation, ensuring the process is smooth, stress-free, and completed on time.

Home Addition FAQs

Yes, a construction permit is required when building a home addition in Seattle. For smaller additions, you may be eligible for a subject-to-field inspection permit, which typically involves fewer requirements and can be quicker to obtain through the Seattle Department of Construction and Inspections (SDCI). Permits and inspections play an important role in ensuring the safety, structural integrity, and overall feasibility of your project. For the latest information and specific guidelines, it’s best to visit the SDCI’s House Additions and Remodels page.

To get approval for a home addition in Seattle, your plans must meet the minimum standards set by the Seattle Residential Code. Key requirements typically include a detailed site plan showing the existing footprint of your home, a complete design layout of the proposed addition, and an electrical plan outlining any new or modified wiring. These documents help ensure the project is safe, up to code, and ready for permit review.

The answer depends on your home, lot size, and goals. Building up typically involves adding a second story, which requires reinforcing the existing structure to support the added weight. You’ll also need to factor in costs for a new roof and the extension of HVAC, plumbing, and electrical systems to the upper level, which can make the process more complex.

On the other hand, building out—also known as a home extension—is often more straightforward and may be more budget-friendly. However, it comes with its own challenges, such as site access, integrating new construction with the existing home, and potential yard space loss. Our team will help you evaluate both options based on your property layout, budget, and long-term needs to ensure the best fit for your home.

Yes, home additions can be built during wet or winter months. Experienced contractors build year-round and take extra precautions to protect the work site from the elements. This often includes using weather-resistant materials, installing temporary tarps or coverings, and carefully scheduling key phases of construction around dry weather windows. With proper planning and site protection, building in colder or wetter seasons is not only possible but also efficient.

The size of your home addition depends on your property’s zoning regulations. In Seattle, the Municipal Code sets limits based on lot size and location. For single-family zones, the total footprint of all structures generally can’t exceed 15% of the lot size if it’s under 5,000 square feet, or 35% for lots larger than 5,000 square feet. There are also height restrictions to consider, which vary depending on your property’s specific zoning and intended use of the addition. It’s important to review these rules early in the planning process to ensure your design stays compliant.

It depends on the capacity of your existing system. In some cases, your current furnace or air conditioner can be extended to heat and cool the new addition. However, if the system is already working near its limit, it may not effectively handle the extra space. When a full upgrade isn’t necessary or within budget, we often recommend adding a supplemental system, such as a ductless mini-split or radiant heating panels, to keep the new area comfortable without overloading your existing setup.

Home addition costs can vary widely depending on the size, complexity, and scope of the project. In Seattle, a mid-range master suite addition averages around $161,000, while a more upscale version can exceed $330,000, according to the Cost vs. Value Report. Second-story additions often start above $300,000 due to their structural and design complexity. It’s also common for homeowners to include additional upgrades—such as exterior work, staircases, or decks—within the same project, which can increase the overall investment.

We’re often asked about cost per square foot, but the truth is, there’s no one-size-fits-all number. Factors like the age of your home, access to plumbing and HVAC, design features, and structural needs all play a role in the final cost. That’s why we prefer to understand the full scope of your project before offering an estimate—so you get accurate pricing without hidden surprises.

Let’s Discuss Your Home Addition Project Today

Ready to expand your living space? Contact Evergreen Remodelers for a home addition consultation and custom home addition estimate. From kitchen extensions to garage conversions, we are here to help you create the perfect home.