Sit back, relax, we’re in controls.

MacDonald-Miller is a full-service HVAC Building Controls Contractor. As a factory certified provider of global industry leading building controls solutions, we can be your one-stop shop for all your HVAC building control systems, lighting, small commercial, and balancing & commissioning solutions. We implement open-sourced web-based systems, allowing for remote monitoring and control of a building from a system-wide holistic standpoint. Now you can rest easy knowing you have a single system to make your buildings work better.

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What We Do

All Building Types

  • Critical Environments / Life Sciences
  • Commercial Office / Mixed-Use
  • K-12 & Higher Education
  • Federal, State and Local Municipalities
  • Hospitality & Entertainment
  • Industrial
  • Data Centers
  • Healthcare


Mechanical Construction


  • Plan & Spec
  • Preconstruction Services
  • Design/Build – New Construction and Tenant Improvements
  • Turnkey Projects including In-house Electrical
  • HVAC System Retrofit and Modernization


Full Service Automated

Controls & Maintenance

  • Extended Warranty for all customers with a Service Agreement
  • 24/7 Emergency Services
  • Factory Certified and Trained Technicians
  • Software Upgrades


We give you options.

We take great pride in offering customers the ultimate freedom of choice in products and service providers. We use off-the-shelf, IT-centric, building automation solutions where integration is seamless and cost effective.

Hear what Our Customers Say…

“MacDonald-Miller implemented a software platform that allows us to create energy baseline metrics for each of our buildings. This tool gives us a way to measure the energy performance for our entire portfolio in real-time. Energy monitoring is better for building performance, and it’s better for our bottom line. We see cost reduction through energy savings. It saves KCLS money by reducing energy consumption, improving performance, and saving time and resources.” – Greg Smith, King County Library System

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We make buildings work better.