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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

    Teresa Kelly
    2 days ago
    Nate was just outstanding! So fast! So knowledgeable! So polite! We can’t wait to do business again:)
    Mike Glatkowski
    2 days ago
    Alex is a great technician.
    Andrea Hyde
    3 days ago
    Excellent work in installing our furnace! Finished in just three hours, and it’s running wonderfully. Walked us all through our new thermostat and how to install and use the app. Such polite technicians and kept our home tidy in the process. Would recommend Southport to anyone.
    Sue N (SueN313)
    3 days ago
    Luke was on time, thorough, professional, and keeps you up-to-date with what’s being done. We have the maintenance program so we pay a small fee monthly and it covers the heating and ac maintenance yearly. Love this program and it works great in retirement
    Jody Davis
    4 days ago
    Southport rocks it every single time! They hire the most knowlegeable , kind, polite, professional people!!! Another fantastic service visit
    Brian Gleichauf
    4 days ago
    Adam was great, very professional and friendly and provided me with all the information I needed to get an estimate for mini -splits.
    Cathy Johnson
    4 days ago
    Great service Polite and knowledgeable young man. Explanation that could be understood as to what was needed to be done with pricing for different options.
    Marilyn Hammes
    4 days ago
    Thank You Riley and Southport Plumbing for a quick response to a very clogged toilet.
    Riley arrived within minutes of the scheduled appointment and completed the work quickly and efficiently. He answered all my curious questions politely and cleaned the area completely after the work.
    Lesson learned… don’t dump your cleaning water down the toilet with the sponges and rags you used!!!
    Eric Hensley
    5 days ago
    I had a boiler system installed by Southport and everyone I interacted with was fantastic! After several quotes I selected them because I thought the company had a lot of integrity. I first got a quote from Caleb who was most professional, walking me through all the options they had for me and being very reasonable on the pricing. They scheduled the installation within a week and, on that day, the technicians Ryan and Jacob were excellent and very hard workers. I appreciated that they were very careful inside the house, putting shoe protectors while upstairs and overall being very respectful. They stayed until the job was done and my heat was restored. I would highly recommend Southport if you need a new boiler installation or and work or maintenance on your boiler, home heat, or water heating system.
    Dave Frook
    6 days ago
    Justin did a great job explaining everything to us. He is very knowledgeable.
    Mario Maritato
    6 days ago
    Timely, professional and friendly service.
    David Geertsen
    6 days ago
    Southport did a good job, Justin was professional, thorough, did a great job !!
    Darlene Severson
    7 days ago
    Thank you for sending Andrew Wenk to test our furnace. He could answer our questions clearly and tested all the important components and measured various pressures, temperatures, speeds, and other technical factors. He gave us 3 estimates for replacing parts that are needed due to age of the furnace. Andrew was pleasant and respectful to us.
    JULIE GRIMM
    1 week ago
    Great technician. Grest communication and friendly. Jacob.
    chris kwong
    1 week ago
    Jacob came over to install a new heat pump and do an annual HVAC maintenance check for winter. Appreciate how Jacob was friendly, communicative on progress/steps/etc, and open for questions!
    Jackson ellis
    1 week ago
    Vincent came and assessed my furnace and was very helpful with diagnosing problems with it. Would definitely recommend them for any needs
    Jackie Lambert
    1 week ago
    Fast and friendly. Thanks for getting my heat back on!
    Karen Parrillo
    1 week ago
    Blake was very courteous and efficient in disconnecting our old dryer gas supply. We appreciate the quick response.
    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.