MacDonald-Miller Facility Solutions
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About MacDonald-Miller Facility Solutions
MacDonald-Miller Facility Solutions operates as a commercial mechanical contractor headquartered in SeaTac, Washington. The company holds a 4.0-star rating compiled across 26 client reviews, indicating solid performance with notable room for improvement. Their service area extends throughout the greater Seattle metro and surrounding Western Washington communities, supporting markets ranging from healthcare and life sciences to industrial and data center facilities.
The contractor distinguishes itself through vertically integrated capabilities spanning design, preconstruction, fabrication, and ongoing service. Their portfolio includes landmark projects such as the T-Mobile Headquarters in Bellevue and Providence Swedish North Tower in Seattle, demonstrating experience across demanding commercial sectors. A 24-hour emergency line at 1-800-962-5979 ensures clients can reach support outside standard business hours.
Customer experiences reveal inconsistent but sometimes exceptional service delivery. Reviewers credit Carlos with transforming persistent heating issues through diligent follow-through and extended troubleshooting. Another client specifically praised the company's attention to detail and project execution on commercial tenant improvements. However, several negative reviews document communication breakdowns and service disputes, particularly regarding HVAC performance following maintenance visits.
What Customers Say
Of 26 reviews, multiple clients rate service 1 star citing unresolved issues and billing conflicts, while positive reviews highlight specific technicians like Carlos who delivered thorough follow-through. Three negative reviews mention fleet vehicle behavior or service quality concerns following maintenance visits, contrasting with commendations for attention to detail in project execution.
Working Hours
| Sunday | Closed |
| Monday | 7:30 AM–4:30 PM |
| Tuesday | 7:30 AM–4:30 PM |
| Wednesday | 7:30 AM–4:30 PM |
| ThursdayToday | 7:30 AM–4:30 PM |
| Friday | 7:30 AM–4:30 PM |
| Saturday | Closed |
Services
Commercial HVAC Installation
Full mechanical system design and installation for new construction and tenant improvement projects.
Design & Preconstruction Services
Engineering support and project planning beginning at initial design phases.
In-House Fabrication
Custom sheet metal and piping fabrication for project-specific requirements.
Service & Maintenance Contracts
Ongoing maintenance programs for installed systems across commercial facilities.
Energy & Sustainability Consulting
Performance optimization guidance for efficiency goals and environmental standards.
Healthcare Facility HVAC
Specialized climate control for hospitals, medical offices, and certified care environments.
Data Center Cooling
Precision cooling systems engineered for server room and technology infrastructure applications.