Old Greenwich, Fairfield County, Connecticut Property Taxes
Median Old Greenwich, CT effective property tax rate: 1.16%, significantly higher than the national median of 1.02%, but lower than the Connecticut state median of 3.14%.
Median Old Greenwich, CT home value: $1,007,580
Median annual Old Greenwich, CT tax bill: $11,724, $9,324 higher than the national median property tax bill of $2,400.
How are property taxes in Fairfield calculated?
Property taxes in Old Greenwich, CT 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 Old Greenwich’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Old Greenwich, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
Old Greenwich, Fairfield County, Connecticut Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.16%
Estimate Property Tax Bill
$11,688
$10,846
Property Tax Rates Across Old Greenwich, Fairfield County, Connecticut
Local government entities set tax rates, which can vary widely within a state. Why? 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 Old Greenwich’s effective property tax rate to other cities in Connecticut and the median property tax rates in Connecticut and the U.S.
In Old Greenwich, located in Fairfield County, property owners encounter a median property tax rate of 1.16%, which is above the national median of 1.02%. This rate reflects the local government's commitment to funding essential services and infrastructure. Compared to other regions in Connecticut, Old Greenwich shares its median property tax rate with other areas in the state, showcasing consistency in how property taxes are assessed. Understanding how these rates are determined and how they compare nationally can empower homeowners to make informed decisions about their property investments.
Property Tax Rates Across Old Greenwich, Fairfield County, Connecticut
Source: Ownwell

1.16%
2.75%
4.35%
Our median effective property tax rate (tax bill ÷ 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 Old Greenwich Tax Rate
1.16%
Our median effective property tax rate (tax bill ÷ 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 Fairfield County Tax Rate
2.52%
Median Effective Connecticut Tax Rate
3.14%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Old Greenwich, Fairfield County, Connecticut
Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
06870 | 1.16% | 1.16% | 1.16% | 1.16% | 1.16% |
Source: Ownwell
Property Tax Assessment Values Across Old Greenwich, Fairfield County, Connecticut
When examining property taxes in Old Greenwich, CT, 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 Fairfield 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.
In Fairfield County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of May. 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 providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Old Greenwich.
For example, the median home price in Old Greenwich is $1,007,580, with tax bills ranging significantly across the county. The zip code 06870 has the highest median home price at $1,007,580.
Property Tax Assessment Values Across Old Greenwich, Fairfield County, Connecticut
Source: Ownwell

$133,910
$628,705
$1,123,500
Median Old Greenwich Market Value
$1,007,580
Median Fairfield County Market Value
$310,800
Median Connecticut Market Value
$189,900
Median United States Market Value
$235,294
Property Tax Assessment Values Across Old Greenwich, Fairfield County, Connecticut
Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
06870 | $346,990 | $646,730 | $1,007,580 | $1,565,410 | $2,262,680 |
Source: Ownwell
Property Tax Bills Across Old Greenwich, Fairfield County, Connecticut
In Old Greenwich, property tax bills are calculated based on the assessed value of a home, which is typically a percentage of its market value. The local tax rate is applied to this assessed value to determine the annual tax bill. Factors such as home improvements, neighborhood developments, and changes in market conditions can influence the assessed value, potentially raising the tax bill. With a median property tax bill of $11,724, Old Greenwich homeowners face higher costs compared to the national median of $2,400. This substantial difference underscores the importance of ensuring that your property is not over-assessed.
Ownwell assists homeowners in Old Greenwich by providing expert property tax appeal services. By analyzing market data and assessment records, Ownwell identifies opportunities to challenge over-assessments, potentially lowering tax bills. With a success rate that speaks for itself, Ownwell’s services can lead to significant savings, ensuring that homeowners only pay their fair share. This can be particularly beneficial in a region where property taxes are notably above the national average.
Property Tax Bills Across Old Greenwich, Fairfield County, Connecticut
Source: Ownwell

$4,549
$11,839
$19,128
Median Old Greenwich Tax Bill
$11,724
Median Fairfield County Tax Bill
$8,346
Median Connecticut Tax Bill
$6,162
Median United States Tax Bill
$2,400
Property Tax Bills Across Old Greenwich, Fairfield County, Connecticut
Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
06870 | $4,037 | $7,524 | $11,724 | $18,215 | $26,329 |
Source: Ownwell