Commercial HVAC, Plumbing & Process Piping Repair Company in Franklin, WI

Franklin Mechanical Contractors & Engineers

Southport employs the top commercial engineers and mechanics in Wisconsin. From commercial HVAC repair and installation to process piping installation to custom-designed mechanical systems, you can trust our expert engineers to get the job done quickly and affordably. Our engineers arrive at the job site promptly, professionally, and ready to solve any challenge. Visit our project gallery to see on-site photos of our past work.


We offer 24-hour emergency HVAC maintenance calls. No matter the project, no matter the hour, you can count on us to fix the problem. Our extended services include prefabrication, plumbing system installation, VRF systems, geothermal heating systems, and fire protection systems. Southport has worked with hospitals, nursing homes, industrial manufacturers, laboratories, restaurants, schools, and governmental buildings. We service all Franklin neighborhoods including:

  • 76th and Southview
  • 88th/Lions Legend Park
  • Berkshire Drive
  • Briarwood
  • Deerwood
  • River Highlands
  • Southwood 41st to 48th
  • Stonewood
  • Froemming Park
  • Hales
  • Marquette Ave
  • Princeton Heights
  • Red Wing Meadows
  • Victory Creek
  • Whitnall Grove
  • Wyndham Hills