More than 80 years of local PNW experience

Other contractors have a one-size-fits-all approach to construction projects, but we've been at the forefront of process and industry innovation for more than 80 years. Our Portland headquarters offers modern, comprehensive mechanical construction solutions for innovative companies, industries, and specialty markets in the Pacific Northwest and beyond.

Comprehensive services

Your modern mechanical construction projects deserve groundbreaking thinking that delivers results. Discover end-to-end solutions grounded in collaboration, safety, and eight decades of proven expertise.

Concrete Installation

A rock-solid foundation for your project—any size, any place. Expert prep and pour for performance you can count on.

Design Services

In-house design-assist services lower costs, boost constructability, and reduce overall schedules for success from the very start.

Equipment Installation

Decades of experience with the most demanding equipment challenges means we get the job done—and we mean the whole job.


Specializing in complete single-source piping solutions that achieve optimal results. You name it, we build it.


Sophisticated, not complicated, for peak performance at any scale. Proven processes keep your projects on track.

Process Piping

Powering innovation and infrastructure for every industry. Specialized systems you can rely on for the long haul.

Service Department

Our dedicated service team will work with you to create a customized maintenance plan that satisfies the needs of your facility.

Sheet Metal

Harder's sheet metal division provides complete HVAC and industrial duct fabrication and installation for all major industries.

Skids & Modularization

Prefabrication reduces downtime and labor costs while minimizing the impact on your operations, no matter where you’re located.

Structural Steel

Strong, safe, secure—infrastructure that holds to the highest standards. Discover workmanship backed by 80 years of experience.

Tank Installation & Modification

Smooth, disruption-free service for every phase of your project. Our expertise guarantees safety and success.

Virtual Design & Construction

State-of-the-art tech for designs that deliver. We combine leading-edge tools with decades of experience to envision and execute with excellence.


ilani Casino

Harder assembled the Mechanical, Electrical, and Sheet Metal IPD team for this new casino in Southwest Washington.


PDX Baggage Conveyor Upgrades

Harder is upgrading the baggage conveyor and catwalk systems within the Portland International Airport during the major Terminal Core remodel.


Aviation Gin Distillery

Harder designed the new mechanical system using owner-provided equipment including stills, condensers, tanks, and conveying lines.


Port Westward Unit 2

At PGE Port Westward, Harder self-performed everything from the concrete pour to process piping.


Legacy Emanuel West Tower

Harder provided full mechanical and design-assist services for this new, $210,000,000, seven-story, 330,000 SF hospital expansion.


RA4 Office and Manufacturing Building

This design-build BIM project included over 160,000 LF of piping, all process and wet HVAC, multiple cooling tower installations, and any associated equipment.


Georgia Pacific Converting Roof Replacement

Harder's Pulp and Paper project experts executed the converting area roof replace and MAU installation.


NuStar Energy Piping and Installation

For NuStar, we built a new pipeline and installed equipment at their Oregon and Washington terminals.

Portland industry expertise

The Portland area’s most innovative companies count on us for region-specific expertise. We know your landscape, your industry, and the singular challenges you face—and have been a part of it since we began more than 80 years ago.

Start the conversation

We understand the unique challenges of building in the Portland-area environment. Find out how our go-big, go-bold approach can make your next project exceed every expectation.

*Required fields

Portland Office

Contact Info

(503) 281-1112


2148 NE Martin Luther King Jr. Blvd., Portland, OR 97212

Contractors License

CCB 74

Follow us

Join our Portland experts

When it comes to talent and teamwork, we go harder than anyone. Join the team that sets the bar for excellence.