Your Go-to Marine Construction in Renton, WA, and Serving Seattle and All of Lake Washington

I recently had the privilege of working with Sea Anchor Marine Construction for a repair project on my dock on Lake Washington, and I can’t recommend them highly enough. From start to finish, their team delivered an exceptional experience, showcasing unparalleled craftsmanship, clear communication, and true professionalism.
The attention to detail from Sea Anchor Marine was extraordinary. Every aspect of the dock repair was meticulously planned and executed, from evaluating the structure to selecting and installing high-quality materials. Their craftsmanship is simply outstanding—each board was perfectly aligned, and every joint was seamlessly crafted, resulting in a dock that’s both robust and visually stunning. The fine details in their work reflect a level of skill and pride that truly sets them apart.
Communication with the team was impeccable. They kept me in the loop at every stage, providing clear timelines, promptly answering my questions, and offering expert recommendations to enhance the project. Their honesty was a breath of fresh air—there were no hidden costs or surprises, and they were upfront about every detail from the outset. This transparency made the process smooth and instilled complete confidence in their work.
Mario, the owner, is the driving force behind Sea Anchor Marine’s excellence. His commitment to perfection is unmatched—he personally oversaw every phase of the project, ensuring every element met his rigorous standards. Mario went above and beyond to ensure our satisfaction, offering creative solutions and checking in regularly to confirm we were thrilled with the progress. His passion for delivering a flawless result shines through in every aspect of the project.
The crew was not only highly skilled but also incredibly polite and respectful. They treated my property with the utmost care, keeping the work area spotless throughout the project. Tools were neatly organized, debris was cleared daily, and the site was left pristine after each workday. Their courteous demeanor made them a pleasure to have around, and their commitment to cleanliness elevated the entire experience.
Sea Anchor Marine Construction is a cut above the rest, combining exceptional craftsmanship, transparent communication, and a customer-first approach. Mario and his team transformed my dock on Lake Washington into something truly remarkable, exceeding our expectations in every way. If you’re looking for a marine construction company that delivers quality, honesty, and professionalism, Sea Anchor Marine is the one to call. They’ve earned my highest praise, and I’ll be reaching out to them for any new on water projects.

Mario and his Sea Anchor crew did an outstanding job for our project. Fast, efficient, responsive to any issues that appeared. Great communication during the project. Highly recommend!!!

Mario and team were great, they delivered what was promised on time. They worked with us to understand our options and got it done.

Let me start by simply stating that I cannot recommend Mario and Sea Anchor highly enough. They are completely trustworthy, honest and fair, and his entire crew are absolutely fantastic. They are highly skilled, have the highest level of professionalism, and are completely reliable. The quality of their work is absolutely outstanding and they have amazing attention to detail.
Over the decades we have worked with many contractors from numerous trades and Mario and his team are at the very top of the list of great experiences we have worked with, as well as with the quality and timeliness of work and project completion.
We enthusiastically give them our highest review and recommendation and anyone who works with them should feel fortunate there is someone so relaible who is accessible to them

Mario and crew were prompt in starting the project, including picking up all materials, loading in the staging and getting work underway. They were diligent in getting the work done, sometimes in rough weather. They did on the fly troubleshooting and stayed on schedule throughout. The quality of work is good and we are super happy with the results. We will use them again I’m sure. Perhaps even for non-marine related work if it works out.

I got to know Mario, the owner, from my neighbor, who had good experience with Sea Anchor, so I decided to use them to rebuild my dock, it took them almost a month to complete the work, it is an excellent project, I am very happy to have this new dock, and very satisfied with Sea Anchor & Mario

Beautiful dock work. On time, on budget. Very thorough evaluation and repair work. I would recommend Mario and his crew for any dock work and construction. Super nice to work with. Thank you, Mario!

Amazing work ! Absolutely recommend Mario and his team!

Mario and his team at Sea Anchor Marine are perfectionists. Their bid for our project was extremely reasonable, they showed up on time and when they said they would. Worked hard and long days and left no debris behind. We are extremely pleased with the finished product. We will absolutely use them again!

Mario and his team have now completed two projects for me. The work has been excellent, on time and in both cases under budget. Do yourself a favor and at least get a quote from him, you’ll be shocked how much the established players are overcharging.

Mario and his crew fixed broken brackets and rollers on our saltwater dock. They were very prompt, efficient, cleaned up the work site and charged a very reasonable price. We highly recommend them.

Sea Anchore is knowledgeable, professional, efficient and friendly. Mario and his crew installed a new dock ladder in 45 minutes. They did a beautiful work. As lakefront condo treasurer, I will highly recommend their work and hire them again and again.