Dock Construction and Repair, Lake Sammamish

Bordered by Marymoor Park at the north end and Lake Sammamish State Park at its south end, Lake Sammamish is a wonderful place for rowing, waterskiing, wakeboarding, wakesurfing, tubing and jet skiing.

Seaborn has been a big part of Lake Washington since 1947, and now we provide the same experienced marine construction services on Lake Sammamish. Our team clears, dives, constructs and drills. We fix, rebuild, reconfigure and tackle big permits. Projects big and small, on budget, on time, and without compromise. Whether you're looking to repair your boat dock, add a dock accessory or clean up your waterfront property, we can help. View our portfolio


Full project design and permitting

Consultation, survey and engineering services


Steel & vinyl sheet, timber, rock and concrete

Pile driving, pulling & repairs (timber, steel and concrete)



Steel & vinyl sheet, timber, rock and concrete


Clamshell dredging

Landscape material supply and delivery