Connecticut property tax by county

Property tax rate by county in Connecticut

Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103 and B25077.

Why county rates vary so much

Property tax is set locally, not by the state, so the rate depends on the county, city, school district, and special districts where a home sits, and on how those local budgets compare to local home values. A county with low home values can still have a high effective rate if its local budgets are large, and a wealthy county can have a low effective rate. The effective rate shown here is the median tax bill divided by the median home value, which is the standard way to compare places; your own bill depends on your assessment and any exemptions.

For Connecticut's income and retirement taxes, see Connecticut income tax and Connecticut retirement taxes.

How does Connecticut assess homes for property tax?

Connecticut assesses homes at 70% of market value, the same in every county. Connecticut towns assess every property at 70% of its fair market value as of October 1, the same assessment date statewide. So a house the assessor values at $400,000 goes on the grand list at $280,000, and the town's mill rate applies to that figure rather than to full market value.

Each town must revalue all of its real estate at least once every five years. Since October 2023 the state has grouped towns into five revaluation zones on a schedule set by the Office of Policy and Management, so neighboring towns can revalue in different years. The assessor must also physically inspect each improved parcel at least once every ten years.

Is there a homestead exemption in Connecticut?

Connecticut has no statewide homestead exemption, and the word homestead does not appear in the property tax chapters of the General Statutes. Since 2024 a town may vote to exempt between 5% and 35% of the assessed value of owner-occupied homes of no more than two units, but that is a percentage and only applies where the town adopted it. Ask your town assessor whether yours did.

Other state relief for homeowners:

• Seniors and disabled owners: The Circuit Breaker program is a credit subtracted from your tax bill by the tax collector, not an exemption of assessed value. You qualify if you own and live in the home and were 65 or older at the close of the preceding year, or are under 65 and receiving permanent total disability benefits. For the 2026 application year, based on 2025 income, total income must not exceed $46,300 unmarried or $56,500 married, counting taxable and nontaxable income. The credit is graduated by income, up to $1,000 for a single person and $1,250 for a couple. Apply with your town assessor between February 1 and May 15. The limits are re-indexed annually to the Social Security cost of living adjustment.
• Disabled veterans: A wartime veteran gets a statutory exemption of $1,000 of assessed value, and veterans with a VA disability rating get more, on a sliding scale from $2,000 to $3,500. No single figure is safe to quote, for two reasons: each town must scale those amounts up at revaluation by the growth in its grand list, and income-qualified veterans get triple the base while towns may vote to add up to $20,000 more. Since the October 2024 assessment year, a veteran with a VA service-connected permanent and total rating gets a full exemption on their primary residence, meaning no property tax on the home at all.
• Several relief programs are local options a town must vote in. A town may freeze the bill of a homeowner 65 or older who meets the income test, so it never exceeds the first qualifying year's amount, and may run its own additional program for owners 65 and over or on permanent total disability. There is also a flat $1,000 exemption for permanently and totally disabled residents, which towns may increase. None of this is automatic statewide, so what you get depends on where you live.

Connecticut sets these rules and each county's property tax office applies them, which is where the application, the filing deadline and the form come from. Some counties add programs of their own; where we have checked a county, its page lists them.

When are property taxes due in Connecticut?

Connecticut does not set property tax due dates at the state level. Each town's legislative body decides whether tax is payable in one, two, or four installments and picks the dates, subject to one rule: the last installment must fall at least 45 days before the end of the town's fiscal year. You get a one month grace period, after which interest runs at 1.5% per month, 18% a year, charged back to the original due date.

That is the state rule. Each county issues and collects its own bill, so the dates printed on your statement are the ones that bind you.

How do you appeal a property assessment in Connecticut?

You contest the assessed value with the the town's Board of Assessment Appeals, then Connecticut Superior Court. The filing deadline is typically February 20 following the October 1 assessment date, or March 20 if your town's assessor got an extension. File a written appeal with your town's Board of Assessment Appeals stating your own estimate of the property's value and your reason. The board tells you your hearing date by March 1 and notifies you of its decision within a week. It can decline to hold a hearing at all for commercial, industrial, utility or apartment property assessed above $1,000,000, in which case you go straight to court. If you disagree with the board you have two months from the mailing of its decision to file in Superior Court, and the town can still collect up to 75% of the tax meanwhile.

Connecticut property-tax rules from primary state sources (revenue department and statute), reviewed September 7, 2026. Exemption amounts and credits change; confirm the current figures with your county assessor. Sources: assessment, exemptions, due dates, appeals.