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Best Home Addition Contractors in Seattle (2024)

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Our annual ranking of top construction firms highlights the top companies in Seattle based on their project volume over the past year, with a focus on relevance. This compilation is derived from permit and contractor information sourced from city, county, and state building departments through our partners at BuildZoom. For further information regarding data accuracy, please consult the note at the end of this article.

Construction data plays a vital role for various stakeholders in the industry. Companies supplying materials and services to general contractors can better focus their marketing efforts by using construction market trends and data about important project milestones and business growth. For instance, by monitoring major project launches, these businesses can time their communications to align with contractors’ needs for new supplies, which helps ensure their outreach is timely and relevant. Additionally, by studying contractor data and growth trends, suppliers can more effectively connect with those poised for expansion. Subcontractors can also use this information to identify general contractors they wish to collaborate with on specific projects. On the other hand, real estate developers and property owners can utilize detailed insights to assess the skills and reliability of contractors and subcontractors, helping them make informed decisions about whom to hire for their projects. With access to accurate construction analytics, they can validate the quality and expertise of their potential partners, ensuring successful project outcomes.

Business# Projects (’23)Average Contract Value
Emerald City Construction11$279K
Eastside Kitchen and Bath10$31K
Keystone Remodeling Inc9$85K
NorthLight Custom Builders LLC7$83K
BH Contracting Services6$35K

Emerald City Construction

Address:
2571 152nd Ave NE, Redmond, WA 98052

Emerald City Construction, a cornerstone of the Seattle remodeling scene, boasts over 17 years of dedicated service to the community, reflecting a deep-rooted family passion for craftsmanship and customer satisfaction. Renowned for their meticulous attention to detail, the company has successfully completed a diverse range of projects, from stunning home additions to comprehensive remodels, transforming houses into luxurious and personalized homes. Their commitment to getting the job done right the first time has earned them a loyal client base and numerous repeat customers, underscoring their reputation for excellence. With a licensed team of skilled contractors, Emerald City Construction provides not just construction services but also expert design support, ensuring that every project aligns with the client’s vision and budget. Their holistic approach, which includes careful planning and seamless execution, sets them apart in a competitive market. The company prides itself on the ability to navigate the complexities of home renovations, including structural modifications and system upgrades, while maintaining a focus on quality and safety. As a licensed general contractor in Washington State, they uphold the highest standards in the industry. Emerald City Construction continues to elevate homes, creating spaces that families are proud to inhabit and enjoy.

Data from the Seattle Department of Construction and Inspections was analyzed by the Seattle Architects team to identify past projects completed by Emerald City Construction. In 2022, a kitchen addition and remodel was undertaken by Emerald City Construction, amounting to $500,000. Additionally, the same year saw the company involved in another $500,000 project, which entailed constructing an addition to an existing single-family residence.


Eastside Kitchen and Bath

Address:
406 Market St, Suite B, Kirkland, WA 98033

With nearly 20 years of experience, Eastside Kitchen & Bath has established itself as a premier contractor specializing in kitchen and bathroom remodeling in Kirkland and surrounding areas. The company has successfully completed numerous high-end renovations, earning a reputation for exceptional craftsmanship and customer satisfaction. Their commitment to quality is reflected in their meticulous attention to detail and transparent communication throughout each project, ensuring that clients feel supported from start to finish. Eastside Kitchen & Bath’s expertise extends to whole home remodels, allowing homeowners to enhance their living spaces while maximizing cost efficiency by purchasing materials in bulk. The dedicated team of professionals is known for delivering projects on time and within budget, with no hidden costs or surprises. Their ability to collaborate closely with clients fosters a creative process where individual visions can flourish, leading to stunning transformations that elevate the functionality and aesthetics of any home. As a testament to their excellence, Eastside Kitchen & Bath has garnered numerous positive testimonials from satisfied clients, solidifying their status as a trusted name in the remodeling industry. Overall, their passion for creating beautiful and livable spaces makes them a standout choice for any home renovation project.

The Seattle Architects team analyzed data from the Seattle Department of Construction and Inspections to uncover past projects handled by Eastside Kitchen and Bath. In 2024, Eastside Kitchen and Bath completed a pantry addition for a total of $59,093. That same year, they also undertook a deck addition project.


Keystone Remodeling Inc

Address:
2018 156th Ave NE, Bellevue, WA 98007

With over 20 years of experience, Keystone Remodeling has established itself as a leading family-owned general construction company specializing in complete home renovations and remodeling. Committed to integrity as their core value, they prioritize professionalism and sustainability while delivering outstanding results. Their extensive range of services includes room additions, kitchen and bath remodels, and custom designs tailored to client needs. Keystone Remodeling stands out with a strong track record, boasting over a hundred five-star reviews that reflect their dedication to customer satisfaction. They offer unique financing options, including six months of interest-free payments, making home improvements accessible to more homeowners. Known for their collaborative approach, the team guides clients through every phase of the project, ensuring that each addition seamlessly integrates with existing spaces. By partnering with top suppliers, Keystone passes on significant savings to their clients, making quality renovations more affordable. Overall, their focus on high-quality craftsmanship and a stress-free remodeling experience positions Keystone Remodeling as a trusted choice in the Seattle area.

The Seattle Architects team reviewed information from the Seattle Department of Construction and Inspections to discover past projects completed by Keystone Remodeling Inc. In 2024, the company worked on a $170,000 project that included adding to and converting an existing garage. That year, Keystone Remodeling Inc also undertook a second-story addition project.


NorthLight Custom Builders LLC

Address:
9800 Harbour Pl, Mukilteo, WA 98275

NorthLight Custom Builders, founded and led by Tony Collins, is a premier construction company with over 26 years of experience in the industry. Built on the pillars of honesty, integrity, and communication, NorthLight prioritizes customer collaboration throughout the remodeling process, ensuring that every project aligns with clients’ goals and expectations. Tony’s commitment to superb craftsmanship has earned the company an impeccable reputation, and their customer-first approach fosters lasting relationships that extend beyond individual projects. NorthLight offers expert design services, allowing clients to visualize their finished spaces with detailed renderings, which enhances the overall building experience. The company holds the prestigious Certified Builder accreditation from the Building Industry Association of Washington, distinguishing them as a vetted and accountable leader in the field. Additionally, NorthLight is a proud member of several organizations, including NARI and the NAHB, showcasing their dedication to exceptional craftsmanship and industry standards. Their services encompass bathroom and kitchen remodeling, ADUs, whole-home renovations, and outdoor living spaces, catering to the Seattle-Everett Metro area and surrounding communities. With a focus on quality and precision, NorthLight Custom Builders transforms clients’ visions into reality, ensuring spaces that are not only functional but also cherished for years to come.

The Seattle Architects team examined records from the Seattle Department of Construction and Inspections to identify earlier projects by NorthLight Custom Builders LLC. In 2019, the company completed a remodel and addition for a single-family residence, costing $179,854. Moreover, in 2014, NorthLight Custom Builders LLC handled a 60-square-foot addition project valued at $152,000.


BH Contracting Services

Address:
15624 E Shore Dr, Lynnwood, WA 98087

BH Contracting Services Inc., a family-owned business founded by Brad and Heather Wilson in June 2001, has built a reputation for quality service grounded in honesty and integrity. Brad’s journey in construction began at the age of nine, working alongside his father, where he gained invaluable skills in quality craftsmanship, blueprint reading, and navigating city regulations. With over sixty years of combined experience among the team, BH Contracting specializes in medium to high-end residential remodels, as well as smaller projects like repairs and deck installations. The company thrives on managing the unexpected challenges of remodeling, equipping clients with knowledge and options to facilitate quick decision-making. Emphasizing a family atmosphere, the Wilsons treat their employees as partners, offering long-term employment, vacation time, and profit-sharing incentives, which contribute to a positive work environment. This focus on employee well-being translates into stability for clients and projects alike. Notably, their additions—such as second-story expansions and dormers—are designed to blend seamlessly with existing structures, showcasing the company’s commitment to quality. BH Contracting Services has become a referral-based business, attracting new clients through its outstanding reputation and dedication to craftsmanship.

Data from the Seattle Department of Construction and Inspections was reviewed by the Seattle Architects team to identify previous projects completed by BH Construction. In 2014, an addition of a bedroom to an existing basement was undertaken by BH Construction, with a project cost of $6,000. Additionally, in 2016, BH Construction completed a project valued at $173,520, which involved adding 50 square feet to a large open room.


Note: The data used to compile this list may not be complete based on the availability of permit data – collecting and consolidating this data is a time-intensive and difficult task. It may not be complete in all areas due to jurisdictional reporting requirements and the availability of data. Job values and permit fees should be taken as estimates rather than exact values, based on the most complete permit and contractor data available. Additionally, number of projects and typical job size may be updated per contractor request.

The time period for the data used for this ranking was the past 365 days, plus an additional 45 days to account for the average timeline of a building permit. If you have any suggestions on the data or see any corrections that you’d like to give feedback on, please fill out this form. For more insights on construction data outside that are not directly related to contractors, there are other resources available as well.

Author

  • Alex Mericle

    Alex Mericle is the Chief Editor at Seattle Architects with five years of experience in the construction space. Alex has always had a strong interest in residential and commercial construction and architecture, and he has built up technical experience with building permit data, subcontractor operations, and materials procurement over the years. On top of his experience at Seattle Architects, he has prior experience at BuildZoom. His analytical skillset, honed through a degree in Business Analytics from Creighton University and from his work experience, allows him to transform complex construction data into actionable insights and useful, captivating content. Expertise: Residential and Commercial Construction, Building Permit Data, Home Design and Build, Architecture, Subcontractor Operations, Material Procurement Key Highlights: Over 5 years of experience writing and editing in the construction space, Chief Editor at Seattle Architects, Previous experience at BuildZoom Education: Creighton University, Degree in Business Analytics

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