The Connecticut Heating Cost Problem
Connecticut's old housing stock — particularly in towns like Westport, Greenwich, and Litchfield — makes oil-to-geothermal conversion a strong economic play. The state's Energize CT program provides substantial rebates, and the dual exemption from state sales tax and local property taxes for geothermal systems is unique in the region.
Connecticut Heating Fuel Breakdown
Avg. residential heating oil: $3.70–$4.30/gal (2025–26 season) · Source: EIA, state energy offices
Connecticut Utility Providers
Understanding your utility provider is important for maximizing geothermal incentives. Here are the major providers in Connecticut:
Eversource
Electric & Gas · Serves ~75% of CT (1.2M customers)
United Illuminating (Avangrid)
Electric · Greater Bridgeport & New Haven (~347K customers)
Southern Connecticut Gas
Gas · Now part of Eversource
Connecticut Geology & Drilling Conditions
Connecticut's geology transitions from eastern highlands (hard crystalline bedrock similar to MA — ideal for standing column wells) to the Connecticut River Valley (sedimentary deposits requiring closed-loop systems). GDNE evaluates each site to determine the optimal system type based on local bedrock and groundwater conditions.
Communities We Serve in Connecticut
💡 Connecticut's unique dual tax exemption (sales + property) makes geothermal one of the most financially advantaged HVAC investments in the Northeast.
Get a Free Estimate
Serving Connecticut with professional geothermal drilling since 1997.
📞 1-800-339-9051Energize CT Incentives
Up to $15,000 residential rebate. Commercial: $4,000/ton for systems up to 11.25 tons. Plus dual exemptions from state sales tax AND local property taxes.
View all Connecticut incentives →Our CT Services
- ✓ Standing Column Wells
- ✓ Closed-Loop Vertical Systems
- ✓ HDPE Fusion & Manifolds
- ✓ Thermal Conductivity Testing
- ✓ Grouting & Well Completion
- ✓ Permitting Assistance