About Alki Deck Builders

Building Seattle's Best Outdoor Spaces for Over a Decade

Alki Deck Builders was founded in 2016 by Luke Triemstra with a simple but powerful idea: bring together a talented group of people who genuinely love to build, and give them an environment where their craftsmanship can thrive. Over the past 10 years, that philosophy has driven our deck company to become one of Seattle’s most trusted names in custom deck construction, completing more than 300 projects and earning a 5-star rating on Google along the way.

What started as a passion for creating outdoor spaces people can actually use has grown into a full-service deck builder known for tackling Seattle’s most complex builds. From standard backyard decks to projects requiring geotechnical engineering and environmentally critical area (ECA) compliance, our team has the expertise, certifications, and drive to deliver results that stand the test of time.

Meet the Founder: Luke Triemstra

Luke Triemstra founded Alki Deck Builders because he believes decks are the most rewarding structures to build. Unlike interior projects hidden behind walls, a well-built deck creates a living space you can see, touch, and enjoy every day. That tangible connection between craftsmanship and daily life is what fuels his commitment to the trade.

Luke’s vision for Alki Deck Builders has always been about more than just building decks. He set out to foster a company culture where skilled tradespeople feel valued, supported, and proud of the work they produce. By investing in his team and creating an environment where craftsmanship thrives, Luke has built a deck contractor team that approaches every project with the same care and attention to detail, whether it’s a straightforward platform deck or an engineered hillside build in a sensitive environmental zone.

When he’s not overseeing projects or planning the company’s next phase of growth, Luke produces music in his free time.

What Sets Our Deck Company Apart

Industry-Leading Certifications

Alki Deck Builders holds certifications that fewer than a handful of deck contractors in the Seattle area can match. Our TimberTech Platinum designation represents the highest tier of partnership with one of the industry’s most respected composite decking manufacturers, reflecting our proven track record of expert installation and customer satisfaction. We’re also a Deckorators Certified Elite builder, demonstrating our commitment to working with premium materials and maintaining the highest installation standards. These certifications aren’t just badges, they give our clients access to extended warranties, exclusive product lines, and the confidence that their deck is being built by a team that has earned the trust of the industry’s top manufacturers.

Specialized Expertise in Complex Builds

While many deck builders focus on straightforward residential projects, Alki Deck Builders has developed a deep specialization in Seattle’s most challenging builds. Our area of expertise includes decks in environmentally critical areas (ECAs) and projects that require geotechnical engineering—builds where soil stability, slope analysis, drainage, and environmental regulations add layers of complexity that demand advanced knowledge and meticulous execution. Seattle’s hilly terrain, variable soil conditions, and strict environmental protections mean that many properties require this level of expertise, and our team has the experience to navigate permitting, engineering, and construction with confidence.

Warranties That Reflect Our Confidence

We stand behind our work with industry-leading warranties. Our steel frame deck builds carry a 7-year workmanship warranty, while wood frame constructions are backed by a 2-year workmanship warranty. These warranties reflect our confidence in the quality of our materials, our installation techniques, and the durability of every deck we build.

3D Design & Free Consultations

Every Alki Deck Builders project begins with a free consultation, available in person or virtually, where we assess your property, discuss your vision, and outline the path forward. From there, our team creates detailed 3D deck designs that let you explore your future outdoor space from every angle before deck construction begins. This design-first approach eliminates surprises, keeps you in control, and ensures the finished product matches your expectations.

Giving Back: Supporting Mary's Place

Alki Deck Builders is proud to support Mary’s Place, a Seattle-based organization that provides safe shelter and services for families experiencing homelessness. Building spaces where people can live, gather, and feel at home is at the heart of what we do, and supporting Mary’s Place is a natural extension of that mission. We believe in using our skills and success to strengthen the community that has supported our growth.

Our Track Record

Over 10 years in business, Alki Deck Builders has built a reputation that speaks for itself. With more than 300 completed projects and a 5-star Google rating, our results reflect a deck company that prioritizes quality craftsmanship, honest communication, and lasting client relationships. Every review, every referral, and every returning client reinforces what we’ve believed since day one: when you bring together good people who love what they do and give them the tools to succeed, the work speaks for itself.

Building the Future

As Alki Deck Builders looks ahead, our goals are ambitious but grounded in the same values that have driven our success. We’re focused on doubling our revenue while maintaining the quality, culture, and client experience that earned us our reputation. Growth for us doesn’t mean cutting corners—it means expanding our capacity to serve more Seattle homeowners and businesses with the same level of craftsmanship and care that has defined our first decade.

Whether you’re planning your first deck, replacing an aging structure, or tackling a complex build on a challenging site, Alki Deck Builders is the deck builder Seattle trusts to get it right.

Ready to Start Your Project?

Contact Alki Deck Builders today for a free in-person or virtual consultation. With over 300 projects completed, 5-star Google reviews, and a team that loves what they do, we’re ready to build your dream outdoor space.