As the tidal wave of construction booms in Seattle and rapid expansion takes over the Pacific Northwest, we’ve built up a team of professionals capable of taking on every new challenge. Because of our ability to acquire an unparalleled volume of new construction work, we can tackle the largest mechanical projects Seattle has ever seen.

Our depth and breadth of services is unmatched

From design, to build, to installation, to TAB and commissioning, we can be a true partner from concept to completion. MacDonald-Miller has both management and field experience to meet the growing demand of new construction in our industry.


Union Stables

500 Fairview

Union Stables

Amazon Block 45

UW Medical Center Expansion Phase 2

UW Medical Center Expansion Phase 2

Amazon Block 45

Amazon Block 45

2030 8th Ave

Union Stables


It’s all about quality

At MacMiller, we recognize the importance of delivering on-schedule and within budget, all while providing the highest quality possible to your project. In alignment with our Lean principles, we have a quality assurance program in-place to ensure projects are built with the utmost level of craftsmanship and attention to detail, while minimizing waste and re-work. From project start to finish, our quality assurance program has a procedure at every stage to guarantee the success of your building.

Collaboration is key

We maintain certified specialists in every field, which leads to fluid cross-collaboration between departments. Our representatives and managers draw upon this expertise to find solutions and make suggestions to our customers for any challenge they encounter. Commencing from a napkin sketch all the way to onsite implementation, the transparency of our communication fosters success every step of the way.

Let's get started

Are you working with our team on a new construction project? If you have questions, we have answers.

Contact us today!

We make buildings work better.