Free estimates on your bath or kitchen remodeling projects

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Mukwonago’s Choice for Heating and Cooling Since 1956


Martens Plumbing & Heating is in its fourth generation and seventh decade as a family-run business. Knowing how important your home is to you and your family, we are committed to helping it function safely, efficiently and reliably. With 65+ years of experience, we are experts in our field and proud of our reputation for top-notch customer service. You can count on us to:

  • Connect you with a person when you call, and follow up quickly.
  • Get the job done properly the first time.
  • Respond promptly to emergency and after-hours calls.
  • Deliver our services on time and on budget, at the best value possible.
  • Meet the highest standards for instal­lation and remodeling by experienced, trained professionals.
  • Guarantee your satisfaction 100 percent. If you’re not happy with your system within one year of instal­lation, we’ll come back and make things right.

See what our customers say about us.

We had one scheduled repair (leak from a shower) and one mild emergency (water heater). They were able to get someone here quickly in both cases, and the servicemen were friendly and took care of the issues for me quickly. I have used Martens for years and have always been happy with their service.

Jon L.

Neil did an excellent job tackling a handful of projects in our new house. He looked at things that were not on my list as he was working and made sure I was aware of past work and potential improvements. He completed the work in a timely manner.

Kelly B.

Thirty minutes before our dinner guest showed up on a Saturday night, our lift pump died, and our basement was filling up with water. Clueless as to what to do and somewhat panicked, I called Martens Plumbing. Neil got right back to me, talked me through a couple steps and, when we realized there were no quick solutions, he came out to our house. He immediately diagnosed the issue and got to work. He was done in a little over an hour and everything now works perfectly. No mess, no hassle, our dinner plans progressed without a hitch. Thank you, Neil, and Martens!

Brien F.

We have been using Martens for over 25 years and have always been very happy with their profes­sionalism, communi­cation, products, and services. They not only provide the maintenance/​service called for, but also provide suggestions for what I as the homeowner can do to maintain or extend the life of my system.

Nancy B.

Our technician Colin did a great job. The people answering the phone and scheduling our appointment were very pleasant and helpful. I’ll call them again for service.

Pat M.

We have used Martens for years for A/​C and furnace maintenance. In the past had them remodel a bathroom, replace furnace, replace thermostat, install water heater, and water purifying systems. Have confidence in their work.

Piroska F.

Martens Plumbing & Heating wants to be your first choice for heating, cooling, plumbing and remodeling needs. Call us today!


Our promise: Urgency, integrity, response and value. While others may focus on one or two of these, we consis­tently deliver on all four. They are the keys to our success and our customers’ satisfaction. Our mission is to continually focus on our customers’ needs through staff training, quality products and exceptional service. This starts with listening to our customers.

Learn More With Martens Minute