About Cardinal
The team Southern Wisconsin homeowners call when they want it handled right
For more than 40 years, we’ve been the local crew behind furnaces that start on the first cold morning, water heaters nobody has to think about, and electrical panels ready for whatever comes next. Heating, cooling, plumbing and electrical, all from one team you’ll get to know.
- 4.9★ Google Rating 4,500+ reviews
- 40+ Years Serving Wisconsin
- Locally Owned & Operated
- HVAC • Plumbing • Electrical One team for your whole home
Our Story
Started in Sun Prairie in 1984, and still answering the phone like neighbors.
Cardinal began as a heating and air conditioning shop for Sun Prairie families. As those families asked us to help with more of the house, we added plumbing and electrical so one trusted crew could look after all of it.
Today we serve homeowners across Southern Wisconsin, and the promise hasn’t changed: show up when we say we will, explain things plainly, and get it right the first time.
Here’s Exactly What Happens
When you call Cardinal.
No guessing, no pressure, and no surprises on the invoice. You stay in charge of every decision.
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A real person picks up.
Call, text or book online — whichever works best for you.
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You know who’s coming, and when.
You’ll get an arrival window and a name and photo when they’re on the way.
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You see options and the price first.
Your technician explains what’s going on and walks you through your options.
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We’re not done until you’re happy.
We make sure your system is working and you’re comfortable before we leave.
Three Locations, One Family
From our roots in Sun Prairie to our teams in Fitchburg and Sussex, we’re proud to serve homeowners across Southern Wisconsin. No matter which Cardinal location serves your home, you can expect the same people-first service and standards.
Whatever your home needs next, we’re one easy call away.
Book online whenever it suits you, or talk with a real person at 608-470-3876. Financing is available on larger projects.