Leading Mechanical Contractor in the Pacific Northwest

Since 1979, Hermanson Company has been a regional leader in Mechanical Systems Construction. Within each of our specialty areas, we offer the best of both worlds – state-of-the-art technology and good old-fashioned hard work and dependability – so that we exceed our customers’ expectations.

Focusing on LEAN concepts, Integrated Project Delivery, and sustainable, efficient ideas, Hermanson Company has successfully blended the best of the traditional industry norms with today’s technology to provide superior service.



From large, complex new & renovation construction to quick-hit retrofits and tenant improvements, Hermanson always strives to meet the unique goals of every project through efficient, cost-effective, and smart solutions that support occupant & team needs, while operating in a safe environment.

We provide design, fabrication, and installation for everything mechanical:

  • HVAC Sheet Metal
  • HVAC Piping
  • Plumbing
  • Medical & Laboratory Gas
  • Process Piping
  • Specialty Metals

Learn more about our mechanical construction Expertise and History.

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Hermanson’s experienced design engineers collaborate with skilled construction professionals to provide efficient, cost-effective, and high-quality mechanical & plumbing systems through an integrated, streamlined process.

To achieve optimum systems design, we incorporate the following key processes to meet client goals and invoke pride from the entire team that’s involved:

  • Assemble a team of experts
  • Prompt & listen to the client's needs
  • Leverage team diversity & strengths to collaborate
  • Clearly communicate systems appearance and integration
  • Deliver & fulfill client goals
  • Maintain our commitment to sustainable practices
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Hermanson’s fabrication facilities – designed and operated to incorporate lean practices – center around efficiency, safety, and creativity in meeting the increasingly complex needs of mechanical systems construction. These key lean construction practices include:

  • Standardization of system components
  • Off-site prefabrication
  • Simplicity of installation
  • Processed pipe

We start with the concept that all mechanical components are pre-fabricated. Sophisticated and detailed Virtual Design & Construction (VDC) processes integrate all design parameters.

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All mechanical equipment will require service at some time during its operating life. Located in the Pacific Northwest, Hermanson Service provides quality maintenance, equipment retrofit, and emergency services for building mechanical systems – 24/7, 365 days a year.  From commercial retail to data centers and hospitals, our goal is always on call and focused on the following:

  • Extend equipment life
  • Minimize downtime
  • Maximize efficiency
  • Identify, fix, and avoid future risks
  • Improve energy efficiency
  • Provide systems to track, manage, and plan projects
  • Deliver quick, efficient 24/7 Emergency Service

Learn more about Service & Maintenance here.

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