All of Connecticut · Tax exemption
Property Tax Exemption for Home Renewable Energy, Solar Heating and Geothermal Systems
Run by Your town assessor
In Connecticut, home solar and other Class I renewable systems on 1-4 family homes and farms, plus solar water or space heating and geothermal systems, are exempt from local property tax. File with your town assessor by November 1.
Amounts
How much you get
The added assessed value of the system is exempt from property tax. For solar heating and geothermal systems, only the value above a conventional system is exempt.
Eligibility
Do I qualify?
You need to meet all 3 of these.
Your home is in Connecticut.
For renewable electricity systems: single family homes, 2-4 unit buildings and farms.
Renewable electricity systems must be installed on or after October 1, 2007, and estimated yearly production can't exceed the home's estimated yearly load. Net metering or third-party ownership doesn't disqualify the system.
Equipment
What equipment counts
Applying
How to apply
You apply in person.
- File the exemption application with your town assessor by November 1.
Use the state form from the Office of Policy and Management; include the system's estimated yearly load and production.
- File once.
No new application is needed in later years unless the system is altered in a way that needs a building permit.
Stacking
Use it with
You can get these too.
All of Connecticut
Sales and Use Tax Exemption for Solar and Geothermal Systems
Amount varies
No Connecticut sales tax on solar electric systems, solar water or space heating systems, or geothermal heat pump systems, including related equipment like inverters and batteries and the installation labor. Give the seller form CERT-140.
Checked Oct 26, 2026
Connecticut customers, Connecticut
Residential Renewable Energy Solutions (RRES) – Eversource
Up to $0.329
Eversource CT customers with new home solar (25 kW or less) are paid for their power for 20 years: $0.3289 per kWh under Buy-All for 2026 applications, or retail-rate netting, with extra per-kWh adders for low-income households.
Checked Oct 25, 2026
Your address
Next steps
Check that it covers your address. Then, if you want, ask for a contractor quote.
Is it available at your address?
Before anything else
Your quote request is in If a contractor we work with serves your ZIP, they can contact you. We take one request per person; contact us to change it.
Get an email if this program changes
We'll write if its amount, status or deadline changes. Nothing else.
FAQ
Questions
How much does Property Tax Exemption for Home Renewable Energy, Solar Heating and Geothermal Systems pay?
The added assessed value of the system is exempt from property tax. For solar heating and geothermal systems, only the value above a conventional system is exempt.
Can I combine it with other rebates?
Yes, with Sales and Use Tax Exemption for Solar and Geothermal Systems and Residential Renewable Energy Solutions (RRES) – Eversource. See Use it with.
Is it still available?
Yes. It was open when we last checked, on October 26, 2026.
Plain words
Words used on this page
References
Sources
This page is built from these official pages, run by the program itself.
When one of these pages changes, we re-check this page against it.
Nearby
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Energize CT Home Energy Solutions – Income Eligible
Amount varies
Households at or below 60% of Connecticut median income get a no-cost home energy assessment and energy-saving work from Eversource, UI, CNG or SCG, including up to 100% off approved insulation. Renters can apply.
Checked Oct 25, 2026
All of Connecticut
Energize CT No-Cost Heat Pump Consultation
Work done at no cost
A free virtual consultation with an Energize CT Heat Pump Specialist: how heat pumps work, which rebates apply, the right system for your home, and help comparing contractor quotes.
Checked Oct 25, 2026
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Energize CT Residential Air Source Heat Pump Rebates
Up to $1,500 back
Eversource and UI customers get $1,500 per ton (up to $10,000) for an air source or air-to-water heat pump that replaces oil, propane, gas or electric baseboard heat, or $250 per ton (up to $2,500) otherwise.
Checked Oct 25, 2026