How geothermal works
A few metres down, the ground stays at a steady temperature all year. A geothermal system circulates fluid through a buried loop to pick up that warmth in winter and dump heat back into the ground in summer. A heat pump in the basement concentrates it and moves it through your ductwork or in-floor heating. Because it moves heat rather than burning fuel, it delivers several units of heat for every unit of electricity it uses.
Loop types and what they cost
| Loop | Best for | Typical installed cost |
|---|---|---|
| Horizontal | Rural lots with open land | Lower end of $22k to $45k |
| Vertical (drilled) | Smaller lots and town properties | $30,000 to $48,000 |
| Pond or lake | Waterfront lots with enough depth | $18,000 to $28,000 |
Ranges are typical 2026 Ontario market figures from published cost guides (Builders Ontario 2026 geothermal guide), shown to help you plan. They are not a quote. Your project gets its own fixed price after a site visit, with every line item written out.
Rebates
Ontario's Home Renovation Savings Program lists ground-source heat pumps at up to $12,000. Sources disagree on what homes heated with natural gas receive, the installer has to be on the program's contractor list, and the equipment has to be on the qualified products list. Check the program's current terms before you budget on it; we help you confirm eligibility. See our geothermal cost guide for the details.
Geothermal or an air-source heat pump?
Geothermal costs more to install and lasts longer, with ground loops rated for decades. A cold-climate air-source heat pump costs much less up front and works well in most of our area. For a new custom home or a rural property on oil or propane, geothermal often pays back. For many existing homes, a cold-climate heat pump is the smarter money. We tell you honestly which fits.
Why plan it with the house
Geothermal works best in a tight, well-insulated house, with ductwork or in-floor heating designed for it and a loop field planned before landscaping. Building it in during a custom home or major renovation avoids digging up a finished yard later.
We work across Northumberland County (Colborne, Cobourg, Port Hope, Brighton), Quinte, Peterborough and the Kawarthas, with Barrie from early 2027.
Questions, answered
Most Ontario geothermal systems cost about $22,000 to $45,000 installed before rebates in 2026. Vertical drilled loops run higher, around $30,000 to $48,000, and pond loops lower.
Ontario's Home Renovation Savings Program lists up to $12,000 for ground-source heat pumps, depending on how the home is heated now. The installer must be on the program's contractor list. Confirm current terms before budgeting.
It usually pays back best on new custom homes and rural homes heating with oil, propane or electric baseboard. For many existing homes on natural gas, a cold-climate air-source heat pump is the better value.
We plan and coordinate the project, and specialist drilling and HVAC partners install the loop and heat pump.