Commercial HVAC
Design and Build Services

Our commitment to your commercial HVAC design & build goes far beyond merely meeting a schedule and staying within a budget. Before we cut a single piece of sheet metal, we carefully plan every aspect of the job, coordinating with other trades and figuring out the smallest details in advance.

Project Management

Our job is to make your projects go smoothly. If your project is not properly managed, a lot of things can go wrong: costs overrun, schedules slip, building occupants complain, and efficiencies are lost.

At Home Comfort Alliance, we understand, which is why we take a proactive and comprehensive approach to defining, designing, and delivering every project. We provide professional, trusted advisor Project Management designed to define and meet your expectations every time. We’ve been specializing in HVAC related projects since 1965, so we know buildings and we know how to get projects done on time and within your budget.

Comfortable Environments. Smooth Projects. Energy Efficiency. Tenant Retention. If these are the concerns you have, call on the company you can trust: Home Comfort Alliance.
project planning

Tenant Improvements

When you want it done yesterday, call us today.

Every time a tenant leaves, there’s potential for expensive downtime until a new tenant moves in. But you can drastically reduce downtime and ensure a smooth, quick transition by calling in the Home Comfort Alliance Special Projects & Tenant Improvements team.

We're extremely aware of the importance of responding quickly to your tenants’ needs. Because of this, we have assembled a quick-response team that excels at performing work on very fast track projects.

And we don't just do our work fast, we do it right. Whether you're changing office space, revising computer room systems, correcting poor zoning, or undertaking any other kind of tenant work or retrofit project, you're assured of Home Comfort Alliance quality and attention to detail throughout.

This all adds up to the fastest, most comprehensive, experienced, and expert remodeling and retrofit team available. But of course, you wouldn't expect less than that from Home Comfort Alliance.
MMCS commercial
Commercial HVAC service, design in Seattle-Tacoma

Why Choose Home Comfort Alliance?

Your Comfort is Our Promise
We promise...
Reliable heating, air conditioning, plumbing and electrical service - all from one trusted company.
To educate and guide you through your options so you’ll find the right solution at the right price.
Knowledgeable and respectful workers who ensure both your own comfort during the installation process, and lasting comfort from your home systems.
Outstanding service, communication, and follow-up, so your home is comfortable now and for years to come.

It's a promise we've kept with thousands of homeowners across Western Washington

Years Experience
Installations Completed
Comfort Club Members

What our Customers are Saying!

Technician arrived promptly at the scheduled appointment time. He went through the HVAC system thoroughly and has a good understanding of our different heating and air conditioning needs for the whole house..We look forward to the different estimates of the work to be done.I did not decide to use this company since I am still waiting for the estimates.
Willie Li
Willie Li
Technician arrived on time , courteous and explained maintenance performed.Thank you !
Brian Smith
Brian Smith
great experience with Adam on site installation.Patient and high quality
Jasmine Chen
Jasmine Chen
Michael did an excellent job checking my furnace for the yearly maintenance check.
Lf Rogers
Lf Rogers
Matt was very knowledgeable and professional during the visit. Did not find the intermittent noise of our water tank when he visited but will definitely call back if the issue comes back.
William Chen
William Chen
Jongwook Kim
Jongwook Kim
john sitton
john sitton
Dave Clements
Dave Clements
Very fast and friendly. Good communication and explained all in good detail that was easy to understand.
Cody Armstrong
Cody Armstrong
Always excellent service.
marjorie moore
marjorie moore
Kevin Dunlap
Kevin Dunlap
Pros - Professional, friendly, quality products, large enough to be able to handle difficult projects, no pressure on an upsellCon - Scheduling can be a couple weeks out, but that is more a result of a lack of foreplaning on me than it is on them.We had a new furnace and AC unit put in a year ago, the installation team was great and did a lot of work to make the installation go smoothly in a tight and hard to reach area.Fast forward to today, had our first annual maintenance done and the tech (Zachary S.) was just as responsive to concerns and accommodating to questions. He finished the project faster than anticipated, but at no point seemed to rush or give the impression that he was "phoning it in" while working. As a bonus, Zachary had such a calm demeanor that my highly alert working dog settled down for a nap almost as soon as work began.
Wilson Attebery
Wilson Attebery
Paul Padgett
Paul Padgett
The job’s not quite done today, but they’re coming back tomorrow for the wrap up. So far, so good. A hard working crew.
Lawrence Brandt
Lawrence Brandt
Isaac was great! Explained everything and made sure we understood what he had done. We appreciated all the information and feel good knowing our heating and cooling systems are in good working order!
Barb Robillard
Barb Robillard
Great communication with the company/office. Scheduling was easy and flexible. Isaac was on-time, explained that he was here to clean and inspect the furnace, and got right to work. When he was finished he told me what he'd cleaned and tested, and that he'd changed the filter. He'd even fixed the filter cover (it was bent when we purchased the house) so the cover now fits properly. Isaac was very professional, polite, and efficient. And just as importantly, he had a great sense of humor.
IrishEyes 1971
IrishEyes 1971
I have used Sullivan's for years for my annual inspections. They have always been courteous and diligent in their work.
Great, fast experience. I feel confident about his work.
Holly Brewer
Holly Brewer
Halie Hajek
Halie Hajek


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Office: M-F 8am - 5pm
Emergency Service Available
9680 153rd Ave NE,
Redmond, WA 98052

1404 Riverside Drive
Suite G
Mount Vernon, WA 98273

3409 Everett Ave.
Everett, WA 98201

5373 Auto Center Way
Suite 205
Bremerton, WA 98312

3202 C St NE
Auburn, WA 98002

13701 24th Street E.
Suite A5
Sumner, WA 98390

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