Partial orange curved logo on a black background.
Commercial

Dependable
By Design

Looking for commercial or industrial mechanical services in Wisconsin? Count on Southport Mechanical for highly professional results.
Commercial van with Southport Mechanical logo and the slogan 'Dependable by Design' on its side panel

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.
Southport Mechanical logo: blue 'SOUTHPORT' wordmark above orange 'MECHANICAL' letters with a curved orange accent on the left.
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!
    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

    Brian Childers
    22 hours ago
    I have a Shield maintenance agreement with Southport Plumbing Heading and Cooling.

    The value for the plan is fantastic! They come out and help maintain your plumbing, heating and cooling systems. Jacob from the HVAC side has come out to my home and has done an excellent job of keeping me aware of what is working well, and what I may need to keep an eye on.

    Justan and Nathan from the plumbing side have also come out to my house and did the regular yearly maintenance. They too, do an awesome job of keeping me updated on how the plumbing is within my house.

    I also was alerted to the battery being bad for my sump pump backup system and Justan and Nathan installed a new sump pump and a new backup system as well. The timing was impeccable as we faced a power loss for around 24 hours, and the battery was fully charged and the backup sump pump worked while we didn't have power! It was better paying for the backup system than a repair bill for a flooded basement.

    To round it out, the office staff, Sarah did a great job helping me coordinate not only the visits for the maintenance, but also helped facilitate the installation of the plumbing work.

    They keep giving great reasons why I'm a long term Southport Plumbing, Heating & Cooling customer!

    Thank you!
    Kate Cahill
    2 days ago
    Highly recommend for your HVAC needs! The salesman that came out to do the quote was professional and informative. The installers were incredible! Everyone was on time and on budget. Highly recommend! 10 out of 10 stars
    sonam raptenpa
    3 days ago
    I am very satisfied with their service and products, they really did good job for installing new A/C this hot summer. The cost was reasonable and I am very happy with it, so thank you so much
    Carli Brunner
    5 days ago
    I recently had a technician from Southport come out to provide a quote for a new furnace and air conditioning unit, and I was very impressed with the experience. They did a thorough inspection to determine the best fit for my property rather than offering a one-size-fits-all solution.

    Caleb, the representative, was knowledgeable and took the time to explain all of my options. He educated me throughout the entire process, and made sure I understood the differences between each system so I could make an informed decision. The customer service was truly superb.

    I would definitely recommend Southport to anyone looking for an honest, professional HVAC company. They primarily carry Carrier equipment but they do other options exclusively made by Carrier for Southport as well.
    Jeff Knuth
    5 days ago
    Your team did a great job. They were very professional and friendly.
    Stacy Ellsworth
    6 days ago
    Excellent customer Service! The technicians were professional, and highly experienced! They were able to come out the same day I called to give an estimate and do the actual install installations.
    Shelby Williamson
    6 days ago
    Technician Anthony was professional, friendly and knowledgeable. I learned a lot during my scheduled visit and he fixed some minor nagging problems with noisy vents in my home. Appointment ended with a good plan going forward outlined. Thanks for the help!
    Phil Tobin
    7 days ago
    Good discussion, options to consider, and a good, thorough installation
    Jeanine Hanson Lewis
    1 week ago
    Tommy and Blake were so helpful. They went out of their way to explain everything throughly and left me with clear documentation on my issue as well as a full Plumbing System Evaluation. I received 3 different price structures and ways to save money. I would highly recommend this company! Thank you ever so much!
    Lisa Moreno
    1 week ago
    Great service. Andrew was wonderful and made sure the installation was to his satisfaction by calling the vendor to ensure the faucet was seating correctly and got replacement parts shipped.
    Susan Ventura
    1 week ago
    Very fast response, thorough, and very professional! Impressive service all around!
    Brett Trulson
    1 week ago
    Technician diagnosed unit and found the problem within minutes. Very professional, highly recommended.
    Beth Bourne
    1 week ago
    If you want WOW service, contact Southport! From my first call to schedule an emergency air conditioner unit replacement to the installation, Southport was professional, prompt, and priced fairly. (I originally called another company who was the complete opposite--Southport, however, fixed the issue and made sure I was completely satisfied!)
    Nathan McCollough
    1 week ago
    Vincent good dude. Good work.
    Ken Slagg
    2 weeks ago
    Going to get new central air. Caleb was absolutely great.
    Sherley Benicek
    2 weeks ago
    Was having issues with my Generic generator trying to start up and misfiring. Smelled gas. Long story short HVAC team came out and tested all of the gas pipes. Everything tested good..
    Cathy Koshak
    2 weeks ago
    My entire central air system needed to be replaced. The team that came out was very professional, thorough and knowledgeable. I had a very short timeframe to get this done and they accommodated everything I needed. I would definitely call them again for any of my future needs.
    John
    2 weeks ago
    Very fast responses and action plans
    Map of southern Wisconsin with orange pins marking multiple towns and cities (Madison highlighted) including Milwaukee, Janesville, Kenosha, Watertown, Baraboo, Wisconsin Dells, Oak Creek, Caledonia, Stoughton, Waunakee, and more.
    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 Madison and the surrounding areas. Contact us today!