Commercial Plumbing, HVAC & Metal Fabrication Services

A.G. O’Brien leads the way in commercial construction by offering robust cooperation amongst trade partners, prompt communication between all parties, uncompromising quality in our work, and an unwavering commitment to safety. Whether you’re breaking ground on a new project, renovating a historic building, or just adding on to a commercial structure, we treat every project as an audition for the next one. Customer satisfaction is our primary focus.

Commercial Plumbing Services

  • Commercial Remodels
  • New Commerical Construction
  • Water Heater repair & replacement
  • Tankless water heater repair & replacement
  • Faucet, shower, tub & toilet leaks repair & replacement
  • RPZ testing, repair/replacements
  • Water/waste pipe repair/replacements
  • Commercial Water treatment services
  • Commercial Water filtration services
  • Commercial Sump Pump install/repair/replace
  • Commercial Waste Pump install/repair/replace
  • Commercial grinder Pump install/repair/replace
  • Booster pump install/repair/replace
  • Commercial Drain Maintenance – snake/clog/removal

Commercial HVAC Services

  • Commercial heating
  • Cooling
  • Commercial Ventilation
  • Commercial Remodel
  • New Commercial Construction
  • Heating/Cooling unit repair
  • Heating/Cooling unit service/tune up
  • Heating/Cooling unit replacement
  • Commercial Boiler
  • Commercial Furnace
  • Ductless mini splits for heating or cooling
  • Central heating
  • Central air conditioning
  • Humidification control
  • Air exchanger install/repair/service
  • Exhaust fans
  • Kitchen hoods
  • Steam equipment/system service

Metal Fabrication

Our extensive experience at A.G. O’Brien provides us with the capabilities to achieve all types of metal fabrication projects. We provide high-value custom components for a variety of industries and work closely with our clients to guarantee 100% satisfaction with each service.


Office (218) 729-9662
[email protected]

Service Locations

Saint Louis County

Douglas County

Cook County

Carlton County

Pine County

Itasca County

Bayfield County