KLB Construction LLC

KLB Construction is a heavy civil contractor based in Mukilteo, Washington, proudly serving the Pacific Northwest since 1984. We specialize in complex infrastructure projects across transportation, transit, site development, and environmental restoration. From underground utilities to stream mitigation and grading, we build with precision, safety, and long-term impact in mind.

As a family-owned company, we believe our people make the difference. KLB is built on trust, accountability, and a commitment to doing the job right. We invest in our teams, support career growth, and foster a culture where safety and innovation go hand in hand—on every site, every day.