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Commercial
Dependable
By Design
Looking for commercial or industrial mechanical services in Wisconsin? Count on Southport Mechanical for highly professional results.
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Industries We Serve

Industrial
Manufacturing Facilities
Educational Facilities
Government Facilities
Healthcare Facilities
Nursing/Assisted Living Facilities
Multi Family and Hotels
Business and Retail Facilities
Warehousing and Storage Facilities
Our Services

We Are There
When You Need Us

We assemble a versatile team of professionals equipped with the knowledge necessary to accomplish tasks effectively.
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About Us

Engineered Systems Built for Performance

Southport Mechanical has delivered expert HVAC, plumbing, and fire protection solutions across Southeastern Wisconsin since 2005, now serving the Madison and Wausau regions. Backed by over a century of combined experience, we’ve grown into a full-service design-build firm with a 45,000 sq. ft. facility and in-house fabrication capabilities.

From commercial and industrial systems to residential projects, we provide efficient, high-performance solutions tailored to your building, helping you achieve reliability, comfort, and long-term value.

Schedue a Consultation Today

Ready to take the next step toward a more efficient and comfortable property?

Our Completed Projects

Siena on the Lake

Siena Center is a multiyear, multi-phased, renovation of a senior community originating from an ecumenical partnership between the Racine Dominicans and Lincoln Lutheran of Racine. On the shore overlooking Lake Michigan, the project consisted of multiple facilities. Phase 1 consisted of 70 retreat center rooms with conference and retreat space. In addition, there are 64 new residences for the Sisters along with 4 guest rooms. Phase 2 consisted of 32 skilled nursing rooms, 16 skilled rehabilitation rooms, physical and occupational therapy space along with a wellness clinic.

Dickson Hollow

Dickson Hollow is a one-of-a-kind assisted living facility located in Menomonee Falls, WI. This project features 4-story wood, 120-unit senior apartment building. Two Story town center along with an underground garage. A three-story, 60-unit assisted living and memory care apartment building of steel framing. The approximate size is 300,000 square feet of new construction that feature 180 new units.

Springs of Kenosha, WI

Complete plumbing for over 180 two- and three-story residential buildings featuring studios, one-, two- and three-bedroom configurations with contemporary appliances and finishes. The Springs properties also offer fully-featured community clubhouses including fitness centers, meeting and business centers, outdoor pools and gathering spaces.

Olympia Brown Science School in Racine, WI

A one-story, 67,500 square-foot elementary school in Racine County that serves Pre-K through 5th grade with 20 general classrooms and 8 specialty teaching spaces. Located near the shores of Lake Michigan, the school was designed to be a science-focused school where students will get hands-on learning experiences to better prepare them for careers of the future.

Sun Prairie Public Library

Sun Prairie Public Library in Sun Prairie Wisconsin. We are currently installing the plumbing and HVAC of a renovation and a 25,000 square foot addition to the existing library. The renovation portion of the job is projected to begin summer of 2025.

Lake View Technology Academy

We completed the HVAC install of this brand new 48,000 square foot school that specializes in STEM fields and trades education.  We prefabricated the majority of the ductwork as well as the controls for the VAV boxes on this job.

Woodman’s Racine

Woodman’s Racine in Racine Wisconsin.  We are currently installing the HVAC for a brand new 250,000 square foot Woodman’s going up in Racine, Wisconsin. We prefabricated both the spiral and rectangular ductwork.

West Allis DPW

We are currently installing the plumbing and HVAC on a 175,000 square foot brand new municipal building.  We ran BIM coordination for the job resulting in many conflicts between trades alleviated prior to installation.

Summer Ridge Apartments

We completed the design and install of both plumbing and HVAC for a new apartment complex consisting of eight 2-story stacked flats.  We prefabricated all of the underground sanitary piping for this project.

    Affiliations

    Award-Winning Service
    & Proud Partnerships

    Our NATE-certified HVAC team provides heating and cooling system services with one-stop repairs from a fully loaded warehouse on wheels, and skilled diagnostic services to target problems quickly. We can also help when it's time for HVAC system replacement or installation for new construction with a carefully selected and sized system that meets your needs and budget. Whether it's snowing, raining, or a hot summer day, we can make sure that your home is a haven!
    Award poster for Top Work Places 2026 with a yellow shield on a dark blue background, labeled Journal Sentinel and Midsize Business Category.
    Why Choose Us

    The Southport Difference

    Certified Excellence

    With an A+ BBB rating and over 2,000 local reviews, we are built on trust and proudly deliver with precision and care.

    Expert Technicians

    Our NATE-certified HVAC team offers fast heating and cooling repairs with a fully stocked mobile warehouse and expert diagnostics.

    Upfront Pricing

    Transparent, detailed estimates provides before work begins. No hidden fees, just honesty in our business practices.

    Locally Owned

    Proudly serving Southeast Wisconsin, combining climate expertise with a personal touch for every home.

    Guaranteed Quality

    We stand behind every weld, wire, and bolt. If it's not perfect, we return to make it right – guaranteed.

    100% Satisfaction

    All our systems come with a 100% satisfaction guarantee, plus 30-day coverage on all repairs, parts, and labor.

    Read About Our Customers’ Recent Experiences

    cy gu
    3 days ago
    Great experience! Blake did an excellent job repairing a leaking water pipe in our basement. He was professional, efficient, and got the repair done quickly. Everything is working properly now and the water supply is back to normal. I really appreciate his help and would definitely recommend him.
    Sherry S
    3 days ago
    Had a concrete tub taken out and a new single tub put in. Some plumbing and new faucet that I can actually turn now.... yay!! A great job done, thanks to Travis H.
    Joshua Wilson
    4 days ago
    It was nice seeing Logan again. He worked on my previous AC and Furnace for me when he was with his previous employer. Done a spectacular job with the hvac tune-up.
    Cheryl Sarasin
    4 days ago
    Highly recommend. Always has the customer’s best interests in mind. Always on time and friendly.
    Dave Cummings
    4 days ago
    Great service!! Tyler was very informative!!
    DeSaVi S.
    5 days ago
    Southport does a great job. Team is always friendly, and they don't try to sell you on what you don't need. Had Jacob out checking the furnace and troubleshooting a leak issue. He was so thorough and went above and beyond toske sure everything was addressed. So polite, friendly and knowledgeable. Love the whole team!
    Gail Seianas
    6 days ago
    Everything is absolutely beautiful! We are so pleased. Everything was explained and pretty much spelled out before they did things. Thank you so much!
    Janine Fellows
    7 days ago
    Vicent did a great job! He explained things clearly, answered questions and was respectful of my environment. Thanks for your great work!
    Daniel O'Brien
    1 week ago
    Seamless process. Our 28 year old A/C unit made it as long as she could. Southport came in gave us options and installed a new unit the following day.
    Angel Basabe
    2 weeks ago
    Great quality work. Very professional and above all very knowledgeable.
    James Young
    2 weeks ago
    Southport was referred to me by my realtor and they delivered quickly during an AC breakdown of my old furnace. They performed the work with professionalism and did not leave a mess.
    Madelon Wise
    2 weeks ago
    I tried Southport because I got a coupon in the mail, and the price for a furnace inspection was excellent. Everybody that I spoke to was helpful and prompt. The technician was knowledgable and he explained everything in detail while showing me photos of each aspect of the system. I appreciated the kindness and expertise of the technician, and I will definitely call on Southport again.
    Emory Wedel
    2 weeks ago
    Furnace checkup was thorough and professional. Recommendations for additional work were clear and well supported. Both guys were knowledgeable and cordial.
    Caroline Mohr
    2 weeks ago
    Southport’s staff were professional, friendly, knowledgeable, and very supportive! They arrived on time and completed multiple drain reroutes in our basement on schedule. Someone was always available whenever we had questions. I can’t recommend them highly enough, and I look forward to working with them in the future!
    Joe Ramsak
    2 weeks ago
    4STAR-Great knowledge & outstanding customer interface.
    Judy Groth
    2 weeks ago
    Andrew was prompt thorough he provided explanations I would highly recommend Andrew and Southport The services were part of the service plan. I really appreciate having everything in one place.
    Peggy Henning
    2 weeks ago
    Jake was a Rockstar! He tackled the AC problem and wouldn't give up until it was fixed. Excellent service!
    Preston Coleman
    2 weeks ago
    Southport serviced my furnace a day earlier than scheduled. Phil was courteous and thorough. Southport does a great job, and the price is right. I highly recommend.
    Stylized blue map of southern Wisconsin showing a service-area with orange location pins across many cities (e.g., Madison highlighted with an orange banner, plus Milwaukee, Wausau, Green Bay area, and others). The image conveys the locations served by Southport Plumbing, Heating and Cooling, with the company logo and name at the bottom.
    Service Area

    Areas We Proudly Serve

    From Caledonia to Madison to Wausau, we proudly serve homeowners throughout Greater Wisconsin with reliable plumbing, heating, and cooling services you can count on.

    Schedule Service For Your Home Or Business Today!

    Are you looking for great HVAC and plumbing services? Our Southport team serves you with quality plumbing, heating and cooling services in Wausau and the surrounding areas. Contact us today!