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The Best Home Addition Contractors in Portland, Oregon

17 Min Read

Operating in the Pacific Northwest of the United States, Portland is known for its vast areas of green space, spanning from parks and forests to beautiful mountaintops. The bulk of residents enjoy living here for a variety of reasons. It is a wonderful city an hour east of the beach and an hour west of the mountains. Portland is popular for its location, environment, comfortability, food and drink, arts and culture, and a variety of other attractions.

Many Portland homeowners and others seeking to nestle in the city also seek to collaborate with home addition contractors to improve their homes. With many existing homes being older, some even being built in the ‘50s, finding the right home contractor is important for best living. To help with your home improvement process, we have compiled here a list of the best home addition contractors in Portland, Oregon.

Neil Kelly

804 N. Alberta St., Portland, OR 97217

Established in 1947, Neil Kelly is one of Portland’s most reputable remodeling contractors. Its services range from kitchen remodeling, basement and attic conversions, expansions, and ADUs. Clients laud the team for their commitment to service, professionalism, and craftsmanship. Neil Kelly started out with a $100 capital and a goal to deliver customer satisfaction. Four decades later, it is already one of the top remodeling companies in Portland. It now has a reputation for award-winning design and community involvement and has received several distinctions as a frontrunner in the remodeling industry. Their most recent recognition includes the 2020 Chrysalis Award for Remodeling Excellence.

Project by Neil Kelly

Under the leadership of owner Neil Kelly, the company’s projects range from modern to mid-century designs. Quality craftsmanship is its hallmark, and professionalism is a non-negotiable commitment. This is what drives the company to create some of the best kitchen, bathroom, attic conversions and ADUs in Portland.

Mountainwood Homes

8324 S.W. Nimbus Ave., Beaverton, OR 97008

With over 565 years of experience, Mountainwood Homes has a solid commitment to continuous improvement. The firm makes it its mission to give its best and create an exceptional experience for every client. For over five centuries, it has proven its expertise through its beautiful, multi-accredited projects. In 2020, it ranked 153rd on the Top 500 Remodelers in the country.

The team of designers and builders at Mountainwood Homes is a team of committed community builders. It believes in the power of utilizing the talents of its team members and network of trade partners. The company is a member of the Home Builders Association of Metropolitan Portland and the Home Builders Foundation. Through these memberships, Mountainwood Homes leaves positive and lasting contributions to the neighborhoods where they live and work.

Project by Mountainwood Homes

The firm’s portfolio displays an infusion of contemporary, craftsman, farmhouse, and classic designs. The following project features a rustic barn design. It is designed to look like a timber frame construction but is framed to gain better thermal performance.

Hammer & Hand

1020 S.E. Harrison St., Portland, OR 97214

With over 25 years of experience, Hammer & Hand collaborates with clients and architects in the Pacific Northwest. Its expertise lies in remodeling, high-performance building, and commercial space projects. To offer the best results, the firm commits to offering precision craftsmanship with the use of modern project management tools.

CEO and co-founder Daniel Thomas knew at a young age that he wanted to build houses. This early interest and passion are depicted in a very charming crayon drawing framed on the wall of the company’s office that depicts a stick person building a house. The caption reads, “I want to be a man that works on houses.” Years later, Thomas is living his dream along with a team of expert men and women who provide exceptional homes across Portland.

Project by Hammer & Hand

One of its most interesting projects is its collaboration with Emmons Design for a 1929 Tudor West Hills home. It was a two-story luxury addition remodel featuring a new family room and an art studio. The design and construction respected the existing footprint while incorporating new elements. The windows, French doors, and parapet proportions and dimensions were all taken from the existing building.. This challenging project required construction on a steep slope with little space for machines. But with the expertise of Hammer & Hand in collaboration with Emmons Design, the completed result was an impeccable home fit for classy and comfortable living.

Metke Remodeling & Luxury Homes

17428 SW Ferry Rd., Lake Oswego, OR 97035

Serving the Portland area for over three decades, Metke Remodeling and Luxury Homes continues to enhance lives by transforming homes. Founder Jeff Metke is proud to lead a team of professionals that aims to provide the highest level of customer satisfaction. Clients attest to its commitment and its ability to offer well-executed projects.

Project by Metke Remodeling & Luxury Homes

Metke Remodeling and Luxury Homes offers a full range of design-build services and luxury home renovations. It is also delighted to serve clients for its custom kitchen, bathroom, and luxury additions. The firm is constantly working to transform living spaces into environments of unparalleled function and beauty.

Cornerstone Builders, Inc.

7721 S.W. Cirrus Dr. Spc. 30-C, Beaverton, OR 97008

Growing up around the remodeling industry, Allen Tankersley began as an apprentice to test his interest in the field. There, his interest developed into a passion that followed him into his adult years, eventually taking a five-year apprenticeship with Local 48 IBEW and later beginning Cornerstone Builders, Inc. with the mission to transform spaces to reflect every clients’ lifestyle. Working in the area of Portland and the Oregon Coast, the firm works closely with its clients to ensure that their vision is well-executed.

Project by Cornerstone Builders, Inc.

Cornerstone Builders, Inc. was recently awarded by the National Association of the Remodeling Industry (NARI) Winner – Regional Awards. The firm is accredited by NARI and has become a NARI Certified Remodeler. With many skilled professionals at the firm, and many accreditations, testimonials and honors to its name, this firm is an ideal partner to add beauty and functionality to every space.

Craftsman Design & Renovation

837 S.E. 27th Ave., Portland, OR 97214

Established in 1996, Craftsman Design & Renovation is one of the most trusted remodelers in the Greater Portland area. The firm offers whole house remodels, kitchens, bathrooms, exterior, and other interior remodeling. The company’s team has a solid reputation in modernizing older homes while ensuring any changes fit with the rest of the property. This team also depends on strong communication to make sure that they avoid pitfalls during the renovation process.

Project by Craftsman Design & Renovation

One of the firm’s projects that won the NARI Pacific Northwest Outstanding Remodeling Achievement Award is its 1906 SE Cottage Addition. This project was completed for a young couple who needed more space after joining households. Instead of moving to a larger home, they chose to keep the property and add a second story. The firm ensured they would keep the original home’s detailing in mind to maintain the property’s personality.

COOPER Design Build

720 N.E. Flanders St. #200, Portland, OR 97232

Working with its clients from start to finish, COOPER Design Build offers a full-service design-build model. Its end-to-end process provides a seamless transition from expert design to precise construction. Its expertise range from whole house remodels, additions, and gourmet kitchens to historic home remodels.

Project by Cooper Design Build

The firm acts as both designer and contractor using a centuries-old process known as the Master Builder. As such, the firm offers client-driven services to connect the design and the construction for a seamless process to building while ensuring lasting personality in all kinds of projects. Relying on collaboration between its team members and clients, the firm has perfected its strategy to ensure that goals are met on budget and with the highest quality.

Square Deal Remodeling

8603 S.E. Stark St., Portland, OR 97216

Since 2002, Square Deal Remodeling has been creating and remodeling a range of contemporary, modern, retro, craftsman, and rustic homes in Portland and Washington, specializing in kitchens, bathrooms, and additions. With its team of in-house designers and builders, the firm has produced many award-winning designs within budget and on schedule. On top of that, its team also uses green products and practices throughout the execution of the project, carefully planning and executing each project with personal care.

Project by Square Deal Remodeling

Square Deal Remodeling is a proponent of several certifications, memberships, awards, and excellent ratings and reviews from happy clients.

Green Hammer

721 NW 9th Ave. Ste. #195, Portland, OR 97209

Green Hammer is a design build firm and certified B-Corp based in Portland, Oregon. Green Hammer creates buildings that promote health and protect the planet. Founded in 2007, the firm’s multidisciplinary team of designers and construction experts are innovators and leaders in creating inspiring, zero energy homes and buildings that create long-term value and positive impact.

When approaching a custom home addition, Green Hammer’s deeply collaborative process results in spaces that engage and delight while evoking a deep connection to the natural world. Green Hammer’s passion for sustainability allows the company to deliver homes, buildings and communities of the highest craft, comfort and performance within the smallest of ecological footprints.

Photo by Bill Purcell Photography

As a B Corp Best for the World Honoree and Real Leaders Award winner, Green Hammer believes business can be a force for good.

Hamish Murray Construction, Inc.

4438 S. Corbett Ave., Portland, OR 97239

Hamish Murray Construction believes that not all construction firms are the same. Many firms focus on the build or the goals, but Hamish Murray Construction focuses on the client. It brings together careful planning, architectural integrity, and a willingness to go the extra mile. Clients are free to choose an architect/designer or work with the firm’s long-standing partners. Clients can also bring personal plans and work with the firm’s extended team to develop them. The goal is to help clients grow comfortable with the project while guiding them every step of the way.

Project by Hamish Murray Construction, Inc.

Hamish Murray Construction acknowledges the fact that obstacles are inevitable. However, the depth of the firm’s expertise enables them to ensure the last impact on both your budget and schedule. The firm is recognized by the City of Portland in its Field Issuance Remodel program, giving them an inspector for all compliance-related services. This benefits clients by having access to top-quality, consistent inspections during the project.

Straight Line Design & Remodeling LLC

9645 S.W. Beaverton Hillsdale Hwy., Beaverton, OR 97005

Straight Line Design and Remodeling takes quality craftsmanship and service one step further. This design-build company established in 2011 ensures that quality control is in its hands from start to finish. They also focus on increasing the structural integrity of its client’s homes in the Great Northwest. Headed by Matt Williams, the firm is acknowledged by the National Kitchen and Bath Association (NKBA) and the Better Business Bureau (BBB). Learn more about them at

Project by Straight Line Design & Remodeling LLC

One of its noteworthy projects is its NE Portland Historic Home Remodel. The firm used a combination of creative and modern design during the remodeling process of this 1925 Tudor-style home. The project also came with a two-story addition and an attached garage. The clients wanted to preserve the original architecture and styling of the home during the renovation. Straight Line complied, and the result was this beautiful home and happy clients.

The Remodel Group

20400 S.W. Avery Ct., Tualatin, OR 97062

As one of Portland’s trusted full-service design-build remodeling companies, T.H.E. Remodel Group is an expert in design, craftsmanship, service, and more. The company is passionate about consistently delivering excellence while building its clients’ dreams. From the initial phone call to the completion of the project, they make sure that the client is part of the process. They do everything with hard work and dedication and have provided the Portland area with more than a decade of service.

The firm’s knowledge of Contemporary, Mid-Century, Farmhouse, and Retro architecture is unsurpassed. Rather than focusing on one specific style, T.H.E. Remodel Group design and build around the vision of their clients. Their exemplary work includes a show-stopping Kitchen, Living Room, and an additional Master Suite Addition in Lake Oswego. This major renovation included a complete reorganization of the rear of the home, providing space for a luxurious kitchen and living room opening up to a beautiful deck looking out over a luscious backyard.

Project by The Remodel Group

T.H.E. Remodel Group gained certifications from the National Association of Home Builders and Remodelers. For two years in a row – T.H.E. Remodel Group has been awarded “Best Major Home Remodel” by Oregon Home at the annual Structure + Style Awards. They also won the Best of Houzz Awards for Service for years 2019, 2018, and 2017. Under the leadership of Steve Klingerman, the team at T.H.E. Remodel Group understands the meaning of integrity, communication, and quality. Learn more about them at

Rebuild LLC

2425 NE 50th Ave., Portland, OR 97213

Rebuild LLC has served the Portland area for over a decade, creating unique, quality products from an investment of emotions. The firm operates under the leadership of Todd Hertner, who upholds the values of honesty, ethics, timeliness, and bluntness. Todd maintains being upfront with the firm’s clients, as he believes that they must know what could and may happen as a result of the project.

Project by Rebuild LLC

Clients laud the company’s works because the firm offers much more than what clients anticipate. The firm interviews every client they engage with because they want to establish a relationship and not just another job. After the interview, the firm takes all of the clients wants and recommendations, weaves them in, and makes it appear as if the home were brand new. The owner acts as the project manager, ensuring that the firm meets or exceeds the client’s expectations every time.

Dluxe Exteriors and Remodeling

12728 S.E. Stark Bldg. G, Portland, OR 97233

Dluxe Exteriors and Remodeling’s expertise lies in design-build, remodels, exterior systems, and additions. The firm has served the Northwest Community since 2019 and is a Lead-Safe Certified Firm. The company offers its services to both residential and commercial projects of all sizes, ranging from homes to commercial projects, amounting to over $3 million.

Project by Dluxe Exteriors and Remodeling

Clients praise Dluxe Exteriors and Remodeling for its speed, quality, and performance. But as a new and growing company, they pay extra attention to ensure that it lives up to every client’s standard. With its experience, the firm gained several accreditations from different organizations including the National Association of Home Builders (NAHB) and the Better Business Bureau (BBB). Additionally, the firm is distinguished for its advanced knowledge in green building and the LEED rating system.

Kaya General Contractors

5802 N. Greeley Ave., Portland, OR 97217

Established in 2000, Kaya Construction is a high-quality design and construction company in the Northwest. For over two decades, the firm has been the homeowners’ go-to for remodeling, renovation, and construction. The company also constructs commercial buildings, custom homes, and sustainable green projects. Kaya is also known for being a solid, reliable, and high-quality partner in the industry.

The firm’s style of work spans from contemporary to modern and craftsman designs. Clients commend owner Greg Martin for his creativity and agility in providing resourceful solutions for any hurdle. The rest of the team works hard to offer homeowners options in transforming their homes while creating a better environment.

Project by Kaya General Contractors

Kaya Construction also operates with the goal to connect to its clients’ needs and economically complete the projects. The firm is a pioneer in the realm of sustainable and green products. They are one of the first companies in the North to put in place green-related practices.


  • Brooke Adams

    Brooke is a Deputy Editor at Portland Architects with around five years of professional experience as a writer and editor in the construction and home improvement space. Her expertise covers a wide range of topics including addition construction, home remodeling, and landscape design. Brooke has a Bachelor's degree in Civil Engineering, and she also brings extensive experience as a project manager for a top construction firm, overseeing multi-million dollar projects. Additionally, she is certified in LEED and OSHA safety standards. Expertise: Addition Construction, Home Remodeling, Landscape Design Key Highlights: Over 5 years of experience writing and editing in the construction space, Deputy Editor at Portland Architects Education: Syracuse University, Bachelor of Science in Civil Engineering, Certificates in Public Relations and Social Media

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