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Plumbing & Water
From small repairs to complex replacements, you can count on our family-owned and ‑operated business to take care of your plumbing. Whether for an emergency or scheduled maintenance, customer satisfaction is guaranteed. 
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Heating & Cooling
We’ve built our reputation on reliable, knowledgeable and friendly service. Whether for maintenance, repairs or instal­lation, experience the Martens Plumbing & Heating difference for yourself. 
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Indoor Air Quality
Odors, humidity, pollution and dust are just some of the ways your air quality can be compromised. If you’re ready to clean up the air inside your home, Martens Plumbing & Heating can help. 
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Showroom & Remodeling
It starts with a showroom full of inspiration and continues with profes­sional workmanship at every step of the way. As our full-service team of pros takes your remodeling job from vision to completion, you can be confident the job is being handled correctly. 
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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.
About Martens Plumbing

See what our customers say about us.

Excellent work. Very knowledgeable and profes­sional technician. Didn’t leave a mess and even got me in a day earlier for a water heater replacement.

Michael B.

Always prompt, always friendly, always good work.

Ron V.

Great service and excellent staff. My serviceman figured out the plumbing problem right away and did a great job of fixing it! Great local company.

Sharon R.

Neil came out on an emergency no water call, came out very quickly. Let us know our problem and gave us a solution quick.

Brenton K.

Great service, and our plumber John was awesome!! Will definitely be requesting him for our next service.

Karlie D.

Dependable and honest!! Suggested a short term solution for AC issue rather than rushing into a whole new system right now. And it worked. Will never use anyone else!!

Jill W.

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

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Air Conditioning Jul 31st, 2024
The top 7 signs your AC system needs repair
Losing your air conditioning on a hot summer day is the worst! But it’s easier than you might think to spot trouble signs and get ahead of them. If your system is showing any of these signs, there’s a very good chance repairs are needed.
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Air Conditioning  |  Furnace Jul 8th, 2024
8 Great Benefits of an HVAC Maintenance Plan
When heating and cooling systems are functioning well, you barely realize they’re there. But, like anything, wear and tear can take a toll over time. When left unattended, this can mean less comfort, higher utility bills and, at worst, sudden breakdowns.
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Indoor Air Quality May 1st, 2024
Why should I consider an air exchanger or ventilator?
Fresh air exchangers and ventilators are all-in-one systems that work along with your furnace and air conditioner to trap dust, bacteria, and other contaminants.
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