Since 1972, Stirrett Johnsen, Inc. has grown to become the largest mechanical contractor in Kitsap County and among the largest and most trusted in the Northwestern United States. With offices in Silverdale, Renton and Yakima, we efficiently serve all markets within the State of Washington, in addition to select out-of-state projects.

We rely on industry knowledge, depth of experience and unmatched craftsmanship to deliver quality systems on time and on budget. Because of this track record, the vast majority of our work is with repeat customers.

Stirrett Johnsen Services Include: • Commercial Plumbing and HVAC Design and Installation • Healthcare • Industrial • Military • Certified Pipe Welding • LEED Certified Designers • 2D and 3D Coordination Services • Prefabrication Center and state-of-the-art weld shop Let us help you make your building the best it can be. Learn more about our history.