Free estimates on your bath or kitchen remodeling projects

Visit our design center showroom for inspiration.

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.

I had an emergency situation (with no water on a Saturday) and they jumped on it when I called. They had the part in stock and their on call service person, Jim, was A +. Thanks so much.

Tom H.

This is one business that I know when I call them, they get me scheduled on a timely manner. Martens has completely changed over my heating, cooling, and water system. Everyone at the office you speak to is profes­sional and the tech that comes to your home does the job and keeps you in touch of what is going on.
I will use them for life…I’m not kidding!

Andy C.

Martens continues to provide excellent service for all of our plumbing and heating needs. We have been in our home for more than 37 years and Martens is the only place we have used. They have provided fast service for emergency situations. This has included 2 deep well pump replacements. Their technicians are always personal and professional.

Frank U.

We have been with Martens Plumbing & Heating for years. They installed our new furnace and first ever A/​C unit. They have been servicing both once a year since then. They are always prompt and courteous. As always thank you for running your business so efficiently.

Lisa H.

The service that we received from Martens Plumbing & Heating was outstanding! Whether it be installing a new hot water heater or problem solving a plumbing problem, their positive manner & thoughtful approach to the work instilled confidence & peace of mind. Thank you!


We always get prompt and profes­sional service when we use Martens.

Dan B.

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