Mechanical Construction

Since 1979, Hermanson Company has been a regional leader in Mechanical Systems Construction – HVAC Sheet Metal, Pipe-Fitting & Plumbing – design, fabrication & installation for projects ranging from large, complex new & renovation construction to quick-hit retrofits and tenant improvements. Learn More

Design-Build Engineering

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. Learn More

Service & Maintenance

All mechanical equipment will require service at some time during its operating life. Hermanson Service provides quality maintenance, equipment retrofit and emergency services for building mechanical systems – 24/7, 365-days a year. Learn More

Lean Fabrication

Standardization of systems components, off-site prefabrication and simplicity of installation are key components of Lean Construction practices. Hermanson’s fabrication facilities – designed and operated to incorporate Lean practices – fabrications and assembles ductwork, piping and plumbing assemblies to drive Lean Construction. Learn More

Featured Projects

UO Knight Campus for Accelerating Scientific Impact
Eugene, OR Learn More

Asante Rogue Regional Medical Center
Medford, Oregon Learn More

Battery Active Materials Factory (BAM-2)
Moses Lake, Washington Learn More

Climate Pledge Arena
Seattle, Washington Learn More

University of Washington Hans Rosling Center for Population Health
Seattle, Washington Learn More


"I talked to the facility manager this morning; he had nothing but compliments for your crew.  He said they were professional, kept him updated, and there were no surprises.  He also said they can work here any time!  Thank you very much!"

- Suzanne Arnal

"Hermanson completed the project on time, within budget and with minimum disruption of the staff.  Their planning and execution of the construction was exceptional."

- Terry Williams

"At the start of this job, I dreaded the potential of this interface of existing and new systems coming on line, but your team has truly eased my concern… On top of the coordination, the overall installation has been excellent and the work laid out in such a manner that when Hermanson is all done, it will look as if it was the original installation and not a third renovation."

- Keith Geary, Director of Engineering

"We wish to extend our appreciation to Hermanson Company for participating with the Boeing - 767 Relocation project and your Company's contributions to its successes.  The list of challenges to the team was lengthy and with your assistance and perserverance, each was resolved safely, timely, and on budget."

- Ken Graves

"The company you can always count on, always follows through, and always has a unique solution for the problems at hand. I enjoy working with Hermanson and look forward to many labs in our future. You have an exceptional team!"

- Melinda DeWalt