Seattle Home Additions

Sometimes the existing footprint of your home just isn't big enough for that perfect master bedroom and bathroom or ideal kitchen layout.

Maybe you need an extra bedroom or family room.  Whether you are thinking of going up, bumping out, or expanding down, we work with a team of architects and engineers making us the perfect first call for your expansion project. 

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Popular Seattle Home Additions Ideas Include:


Master Suite Additions

A master suite addition involves expanding a home to include a large, private bedroom with an en suite bathroom, often featuring additional luxuries such as a walk-in closet, sitting area, or custom amenities. This type of addition aims to create a spacious, comfortable, and personalized retreat within the home.


Bathroom Additions

Bathroom additions involve constructing a new bathroom in a home, which can range from a simple half-bath to a luxurious full bath with high-end fixtures and amenities. These additions are typically undertaken to enhance the functionality and value of a home, meet the needs of a growing family, or add convenience and privacy.


Second Story Additions

A second story addition involves adding an entirely new level to a single-story home, effectively doubling the living space. This type of addition allows homeowners to expand their living area vertically, adding bedrooms, bathrooms, or additional living spaces, without increasing the home's footprint.


Dormer Additions

Dormer additions are one of our most popular additions as many homes in Seattle are designed in a way that makes a dormer addition one of the easiest home additions.

Main Floor Additions

Main floor additions involve expanding the ground level of a home to increase living space, which can include enlarging existing rooms like the living room or kitchen, or adding new rooms such as a family room, bedroom, or sunroom. This type of addition is designed to seamlessly integrate with the existing structure, enhancing both the functionality and aesthetic appeal of the home.


Basement Dig Outs

A basement dig out involves excavating and deepening an existing basement to increase ceiling height and create additional livable space, often transforming it into a more functional area like a family room, home office, or extra bedrooms. This process requires structural modifications to the foundation and careful planning to ensure the integrity and safety of the home.


Top-Of-Garage Additions

We find many homes have potential to add living space on top of the garage. This is a great way to add a rec room for the family to play in.


Mother-In-Laws, Accessory Dwelling Units, and Granny Flats

Mother-In-Laws, Accessory Dwelling Units (ADUs), and Granny Flats are small, self-contained living spaces located on the same property as a main residence, offering independent facilities like a bedroom, bathroom, kitchen, and living area. These units are used for various purposes, including housing extended family members, generating rental income, or providing a private space for guests.


“Built Square took fantastic care of us”


Trust Built Square With Your Home Addition

A home addition is a significant investment and finding a home remodeler you can trust is paramount.  

Built Square has a proven track record in home remodels and home addition projects.

Built Square has carved a niche as a premier name in the Seattle remodeling industry, celebrated for our dedication to quality, meticulous attention to detail, and excellent customer satisfaction. Our team of seasoned professionals is equipped with extensive knowledge and expertise, ensuring that your home addition is more than just an expansion—it's a transformation of your living space, blending beauty with functionality.

Right from the first design consultation to the final execution, we engage closely with you to fully grasp your vision and requirements. We take pride in utilizing only the finest quality materials, modern techniques, and staying abreast of the latest design trends to construct a home addition that not only captivates visually but is also built to last, ensuring durability and practicality.

Our portfolio is a testament to our versatility, displaying a wide array of successful projects that have been tailored to meet the unique styles and preferences of our clients. This flexibility, coupled with our steadfast commitment to excellence, has secured us a distinguished reputation in the industry.

\We place immense value on clear and transparent communication, keeping you informed and involved throughout the entire process of your home addition. This method guarantees that your project remains on schedule and within budget, while also fostering a relationship grounded in trust and mutual respect. Our detailed planning and efficient execution are designed to minimize disruption to your daily routine, aiming for a remodeling experience that is as seamless and stress-free as possible.

With Built Square, you're not merely hiring a contractor; you're partnering with a team deeply committed to realizing your vision for the perfect home addition. Our history of satisfied customers, glowing testimonials, and repeat business clearly illustrates our dedication to delivering outstanding results. Choosing Built Square for your home addition ensures peace of mind, knowing your project is in the capable hands of professionals dedicated to surpassing your expectations.

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Our Home Addition Process

The first step is to fill out our online form with as much detail as possible. We will then schedule a phone and in-person consultation to discuss your project goals. We create a bid for your home addition based on your budget and scope. Once you've accepted our bid, the fun begins!

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Meet + Assess

During our initial meeting, we'll discuss your vision, project goals, and requirements, focusing on the scope and cost feasibility.

Develop + Budget

We meticulously plan your remodel and provide a transparent, detailed budget to align with your goals, ensuring no surprises along the way.


Our skilled team brings your addition design to life with precision and efficiency, ensuring a smooth, high-quality build that transforms your space.

We’re there every step of the journey LEARN MORE ABOUT OUR PROCESS