How much does geothermal installation cost in Illinois?

A residential geothermal installation in Illinois typically runs $15,000–$30,000 depending on the home size, the loop field configuration (horizontal trenches vs. vertical bores), and existing ductwork condition.

The 30% federal tax credit (Inflation Reduction Act, currently available through 2032) reduces this significantly — a $20,000 installation becomes $14,000 after the credit.

Most homeowners who stay in their homes 10+ years see a positive ROI through energy savings. Vinson and Sill can provide a site-specific assessment and quote.