Geothermal.contractors

G.O. Loop LLC is a dedicated geothermal loop drilling and installation contractor headquartered in Fox Lake, Wisconsin, serving all of Wisconsin and northern Illinois. Founded in 2005, the company has completed over 2,500 closed-loop geothermal systems across residential and commercial projects. Their scope covers turnkey loop field work including vertical drilling, directional drilling, trench excavation, and water system flushing — the below-ground portion that connects a property to earth-stable temperatures for year-round heating and cooling efficiency. G.O. Loop partners with HVAC contractors who supply the heat pump equipment, providing precision loop design supported by advanced software and IGSHPA-certified team members. The company is a member of the Wisconsin Geothermal Association and Wisconsin Builders Association. Verified active operator per goloopwi.com (founded 2005, 2,500+ loops installed) + Wisconsin Geothermal Association membership — WI bundle audit 2026-06-02