Since Carl Coffman founded our company in 1979, Coffman Excavation has grown from a specialist in residential septic systems to a full-service contractor specializing in site preparation and roadway construction.


From small scope projects to major public works endeavors, we have gained a reservoir of knowledge that only four decades of experience can impart.

Carl Coffman, Founder

By focusing on integrity, service and long-term relationships, we have remained a premier contractor in the Portland Metropolitan area.


Our longevity in the marketplace and collaborative project approach has created enduring partnerships that are based on loyalty and trust.


Coffman Excavation promotes employee retention by fostering a team-based atmosphere, continued opportunity for growth and a culture based on respect.

This philosophy has resulted in a diverse management and ownership team comprised of both field and office employees. Our team takes personal responsibility for meeting your project’s timelines, budgets and overcoming the inevitable hurdles that can challenge even the most successful project.




At Coffman Excavation, safety is our first and most important value. We have an exceptional safety record resulting from our thorough processes and a core belief that all incidents are preventable.



We get the job done right.

Every time.

Our team is committed to excellence, and takes personal responsibility for meeting your project's timeline, budget, and for overcoming any obstacles. 



Integrity, respect, loyalty, and long-term relationships are

some of our top priorities. These values have helped us remain a premier contractor in the Portland Metropolitan area.

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Giving Back

We are committed to making a difference in our communities

by contributing to various organizations across the Pacific Northwest. See some of our partners below.