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


"In the workplace, our company has been able to count on you to be an integral part of our projects and play an essential role in their completion.  We are delighted that you made the decision to be our partner in supporting our community as well."

- Bob Babitsky

"This was a tough project. Compared with other contractors, Hermanson Company was head and shoulders above the rest!"

- Dick Dunham

"Your entire team was so easy to work with.  There were no problems - just solutions!"

- Andre Belerjean

"Hermanson's involvement from the pre-construction of the project to the commission allowed us to build a terrific end product for the client."

- Bill Kent

"Your company's ability to listen to our expectations and translate this information into the final designed systems demonstrates your 'can do' attitude.  Once construction was complete, the training and follow-up we obtained have shown that Hermanson Company also backs up what you provide with quick action and timely responsiveness.  Thank you!"

- Melvin Sheldon, Jr.