Vermont has 12 verified geothermal contractors and is a heating-dominated geothermal market with one of the most active state-level rebate frameworks — Efficiency Vermont rivals Massachusetts in per-customer rebate depth. Federal §25D was terminated by the One Big Beautiful Bill Act (P.L. 119-21) on December 31, 2025, but Green Mountain Power (GMP) + Burlington Electric rebates and the §48 commercial credit keep ground-source competitive.
- 12 listed contractors
- 11 cities covered
- ★ 4 avg rating (141 reviews)
- 5 WaterFurnace dealers
- 2 IGSHPA-certified
Top Vermont cities for geothermal contractors
Coverage spans Burlington, Montpelier, Rutland, Brattleboro. Browse contractors by city below.
Featured Vermont geothermal contractors
Vermont geothermal incentives in 2026
The federal §25D Residential Clean Energy Credit was terminated for new residential expenditures completed after December 31, 2025 by the One Big Beautiful Bill Act (P.L. 119-21). 2025 installations carry forward via IRS Form 5695. Vermont homeowners benefit from:
- Green Mountain Power (GMP) + Burlington Electric — Efficiency Vermont — statewide energy efficiency utility (independent of investor-owned utilities) that administers significant rebates for ground-source heat pump installations.
- Efficiency Vermont heat pump rebates — among the most generous in the U.S. Verify current per-ton rates with Efficiency Vermont.
- Federal §48 commercial credit remains active through 2034 with phase-down; widely used in third-party-owned residential leases.
For state-by-state matrix see geothermal rebates by state, and use our geothermal tax credit calculator.
Vermont climate, ground conditions, and permits
Vermont climate is humid continental (Dfb). Ground temperatures at typical loop depth stay around 46–50°F. glacial drift over schist and granite bedrock. Drilling encounters bedrock relatively shallowly.
Closed-loop installations require a Vermont Department of Environmental Conservation (DEC)-licensed well driller, a Vermont mechanical contractor licensing (handled at municipal level), and a local building permit covering the indoor unit and electrical service. For permit specifics see our geothermal permit lookup.
Frequently asked questions
How much does geothermal cost in Vermont?
A typical 3-ton residential system in Vermont runs $20,000 to $34,000 installed depending on loop type, soil conditions, and location. Utility rebates from Green Mountain Power (GMP) + Burlington Electric reduce out-of-pocket cost. Federal §25D no longer applies to 2026 residential installations.
Do I need a permit for geothermal in Vermont?
Yes. Closed-loop installations require a Vermont Department of Environmental Conservation (DEC)-certified well driller, a state-licensed mechanical contractor, and a local building permit covering the indoor unit and electrical service. Reputable Vermont contractors handle the full permit pull.
Vertical or horizontal loops in Vermont?
Lot size and soil determine loop type. Vertical bores dominate dense suburbs; horizontal loops are cost-competitive on rural lots with adequate land area (1,500–3,000 sq ft per ton). Pond loops work where adequate water access exists. An IGSHPA-trained designer matches loop type to your specific lot, soil, and load.