Groton, New London County, Connecticut Property Taxes
Property Taxes in Groton, Connecticut
Median Groton, Connecticut effective property tax rate: 2.89%, significantly lower than the national median of 1.02%, and lower than the Connecticut state median of 3.05%.
Median Groton, Connecticut home value: $166,285
Median annual Groton, Connecticut tax bill: $4,799, higher than the national median property tax bill of $2,400.
How are property taxes in New London calculated?
Property taxes in Groton, Connecticut are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Groton's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Groton, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Groton, New London County, Connecticut Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
2.89%
Estimate Property Tax Bill
$4,806
$4,459
How Does the Groton Property Tax Calculator Work?
Use this Groton property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Groton's median effective tax rate of 2.89% — based on actual property records in New London County — to generate your estimate.
Enter your property's estimated assessed value — the figure used to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Groton's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Groton: rates are 2.89% in 06340, with the highest and lowest median tax bill both at $4,799. Groton’s median effective tax rate is higher than the 3.05% state median tax rate, and the median tax bill is $2,399 higher than the state median tax bill.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Groton.
About Groton Property Taxes
About Property Taxes in Groton, New London, Connecticut
Groton’s median effective property tax rate of 2.89% is lower than the Connecticut state median of 3.05% and higher than the national median of 1.02%. This rate reflects the New London County base levy combined with local school district levies and special assessment districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Groton. Homeowners in the 06340 ZIP code carry a median effective rate of 2.89%, while those in the same ZIP code also pay 2.89%. This reflects how local assessment districts are drawn across New London County. Understanding where you live in Groton can still help you better evaluate your annual tax bill.
Groton homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the February 20, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Groton, New London County, Connecticut
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Groton's effective property tax rate to other cities in Connecticut and the median property tax rates in Connecticut and the U.S.
Our median effective property tax rate (tax bill Ă· assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Groton Tax Rate
2.89%
Our median effective property tax rate (tax bill Ă· assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective New London County Tax Rate
2.80%
Median Effective Connecticut Tax Rate
3.05%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Groton, New London County, Connecticut
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 06340 | 2.64% | 2.82% | 2.89% | 2.95% | 2.95% |
Source: Ownwell
Property Tax Assessment Values Across Groton, New London County, Connecticut
When examining property taxes in Groton, Connecticut, understanding the distinction between market value and assessed value is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The New London County appraisal district estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In New London County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month when notices are sent.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By understanding how assessed and market values are determined, property owners can better navigate property taxes in Groton.
For example, the median home price in Groton is $166,285, with tax bills ranging significantly across the county. 06340 has the highest median home price at $166,285.
Property Tax Assessment Values Across Groton, New London County, Connecticut
Source: Ownwell
$128,800
$283,745
$438,690
Median Groton Market Value
$166,285
Median New London County Market Value
$192,015
Median Connecticut Market Value
$209,000
Median United States Market Value
$235,294
Property Tax Assessment Values Across Groton, New London County, Connecticut
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 06340 | $73,780 | $115,500 | $166,285 | $254,905 | $497,875 |
Source: Ownwell
Property Tax Bills Across Groton, New London County, Connecticut
Groton property tax bills are based on the assessed value of a home and the local tax rate set by the city and county. For homeowners, that means the bill is determined by how the property is valued for tax purposes, not by what it would sell for on the market.
With a median home price of $166,285, the typical tax burden in Groton is substantial. The median property tax bill is $4,799, which is above the $2,400 national median property tax bill and the 1.02% national median property tax rate. Bills can vary widely, with the 25th percentile at $3,371 and the 75th percentile at $7,165, while the 90th percentile reaches $13,569.
For homeowners, this can have a major impact on monthly housing costs and long-term affordability. Even within the same city, differences in assessed value and local tax rates can lead to very different tax bills.
Median Groton Tax Bill
$4,799
Median New London County Tax Bill
$5,354
Median Connecticut Tax Bill
$6,666
Median United States Tax Bill
$2,400
Property Tax Bills Across Groton, New London County, Connecticut
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 06340 | $2,177 | $3,371 | $4,799 | $7,165 | $13,569 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
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| Appeal Deadline | February 20 |
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