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.
Blue panel van with 'Southport Mechanical' branding, lighthouse icon, and 'Dependable by Design' slogan on its side.

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!
    Poster for Top Work Places 2026 with a yellow shield on a dark blue background and 'journal sentinel' at the bottom; midsize business category stated at the bottom edge.
    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

    Richard Kugler
    3 days ago
    I excellent service, decent pricing. Definitely recommend and would use again.
    Susan Johnson
    3 days ago
    I have had two service calls now from Southport. Both times the servicemen were prompt and knowledgeable. Last evening I had called because I had a backup with my basement drain. I thought I could wait until Monday but when it backed up again, Thursday night, I called and they rescheduled me for an early morning appointment. Blake arrived and kept me informed of everything he was doing and what he was finding. He made sure to speak with his superior Throughout his time here.Even though it appears the drain was clear they stayed and made sure that I had no issues with the basement drain. Anytime I have had any questions or concerns the owner, Jackson has always addressed them
    Promptly and assures, his customers are satisfied! I have been very happy with Southport
    Kujt Sinani
    3 days ago
    After our home inspection flagged some plumbing issues, I contacted Southport Plumbing. From the very first phone call through the quote and final completion of the work, everything was handled professionally and smoothly.
    Their customer service was fantastic — friendly, responsive, and helpful every step of the way. The plumber (Joe) who came out kept me fully informed throughout the process, which I really appreciated. There were no surprises or hidden costs; the final price matched the quote exactly.
    They also left the worksite clean and tidy when they finished. Overall, a reliable, transparent, and high-quality service. I would definitely recommend Southport Plumbing and would use them again without hesitation
    Rick Hansen
    3 days ago
    Have been dealing with Southport for 15-20 years. This is a quality business ! Dependable, knowledgeable and professional. Does not get better !!!
    Quinn Warner
    3 days ago
    Everyone i delt with were really friendly. From the office girl that took my order to the two that did the install.
    Maranda Webber
    4 days ago
    Had a great experience with Southport!!! Very reasonable prices, great service and all around great company to work with.
    Carole Richard
    4 days ago
    Caleb was very, lvery professional, Answered our questions and assisted in providing the information I needed on the status of a furnace.
    Lauren Wolter
    4 days ago
    Very knowledgeable and helpful. Called in morning about plumbing issue and they were to us within few hours.
    We call Southport for all our havac and plumbing needs. Thank you.
    Lynne Pitts
    4 days ago
    Southport Home Services is a great company and a great choice to take care of your HVAC needs. Although we have dealt with a couple of the other local service companies, we were lucky to come across Southport when we were ready to replace our furnace and AC. They made good, solid, recommendations, suggested going with a heat pump, and did NOT try to upsell us on more than we needed.

    Jackson Barrow and the installation team were fantastic to work with; knowledgeable, patient, willing to explain and educate as they did their work. They fixed some issues with the previous system's infrastructure and made sure we were well taken care of. When we had a minor issue (no fault of Southport) Jackson and team came back out prompltly and took care of it, despite our request being a bit of extra work for them.

    I really can't recommend them highly enough!
    Gregory Polzin
    4 days ago
    Andrew was great from the beginning to end - got the problem solved. Even went the extra mile on servicing the furnace. Love how the company communicates and is right on time.
    Pamela Leonard
    5 days ago
    Henry did an excellent job. He explained everything in detail and clearly maded it easy for me to understand. I would recommend Southport to everyone.
    Josh Fessel
    5 days ago
    They replaced the whole house from outdated pipes, now my water pressure is where it should be.
    Great friendly service, and great price for 2 whole days of work, would highly recommend
    Mary Philips
    6 days ago
    Luke and Buck did a great job getting our furnace ready for winter, showed some tips on keeping our furnace running smoothly. They were personable, efficient, knowledgeable, and kept our mechanical room tidy. Thanks to Southport and Luke & Buck!
    Dave Cummings
    6 days ago
    Great service!! Tyler was very informative!!
    Wanda Alsten
    6 days ago
    We had an excellent experience with Caleb. He was professional, knowledgeable, thorough, and extremely helpful from start to finish. He took the time to explain everything clearly, answered all of our questions, and made sure we understood what was going on, and what our options were.

    What really stood out was Caleb’s attention to detail and the pride he takes in his work. He was friendly, respectful of our home, and never made us feel rushed or pressured. It’s refreshing to work with someone who generally cares about doing the job right and providing great customer service.

    We couldn’t have been happier with the service Caleb provided, and would absolutely recommend him and Southport, plumbing, heating and cooling. Thank you, Caleb, for the outstanding service!
    Donna Mackenzie
    7 days ago
    Very knowledgeable !
    An inspection of washer water valve
    Tina Hartlaub
    7 days ago
    Great work, as always!
    Frank Mazzie
    1 week ago
    Professional and personable installers. They did a great job.
    Definitely. Rob S was very informative.
    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 Milwaukee and the surrounding areas. Contact us today!