Connecticut Property Tax: What You Actually Pay in Every Gold Coast Town

Connecticut property taxes work the same way across every Gold Coast town. The assessed value of your home is set at 70 percent of fair market value. That assessed value is multiplied by the town mill rate. The result is your annual tax bill. What changes dramatically from town to town is the mill rate, and in some cases the assessed value itself based on when the last revaluation happened.

The practical implication for Gold Coast buyers: two homes priced identically in different towns can produce annual tax bills that differ by $8,000 to $15,000. That difference compounds over a 10-year ownership period into $80,000 to $150,000. It belongs in your buy-versus-rent calculation and your mortgage qualification budget before you fall in love with a specific address.

How the Mill Rate System Works

A mill rate is the number of dollars owed per $1,000 of assessed value. A mill rate of 17 means you owe $17 for every $1,000 your home is assessed at. Connecticut assesses at 70 percent of market value, so a $1,500,000 home has an assessed value of $1,050,000. At a 17-mill rate, the annual tax is $17,850.

Mill rates are set annually by each town's governing body as part of the budget process. They change every year, sometimes significantly. The figures below reflect approximate recent rates. Always confirm with the specific town assessor before closing on any property.

Mill Rates and Real Tax Bills by Town

The table below shows approximate mill rates and the resulting annual tax bills at three price points. All figures assume the Connecticut 70 percent assessment ratio. Update these numbers with the specific town assessor before any offer.

Town-by-Town Tax Reality

Greenwich

Greenwich has the lowest mill rate of any Gold Coast town, typically around 11 to 12 mills. It is the clear winner on rate, which is one reason backcountry Greenwich estate owners pay a lower percentage of home value in taxes than homeowners in Norwalk or Fairfield, despite their homes being worth ten times more. On a $3M Greenwich home assessed at $2.1M, annual taxes run approximately $24,000 to $26,000. On a $1.5M home, expect $12,000 to $13,500.

The low rate partly reflects Greenwich's enormous commercial and grand-list tax base. Greenwich Avenue retail, significant corporate real estate, and one of the highest per-capita assessed values in the state all contribute to keeping residential rates lower than surrounding towns.

Darien and New Canaan

Darien and New Canaan both run in the mid-to-high 16s, making them the second-lowest tier on the Gold Coast. On a $1.5M home, Darien buyers pay approximately $17,500 to $19,000 per year. New Canaan is comparable at $16,000 to $18,000.

Darien's rate reflects the cost of funding the most consistently top-ranked public school district in Connecticut. Most families with school-age children do the math and find the $17,000 annual tax bill favorable compared to $40,000 to $55,000 in annual private school tuition per child. At two children, the tax premium pays for itself in year one.

New Canaan's school district performs at nearly the same level as Darien at a slightly lower mill rate, making it one of the better value propositions on the Gold Coast when school quality is weighed against tax burden. See the full guide to every Gold Coast town ranked for NYC commuters for a complete comparison.

Westport

Westport runs in the mid-17s, slightly above New Canaan and below Wilton. On a $1.5M home, the annual bill is approximately $18,000 to $19,500. Westport justifies the rate with Staples High School, one of the nationally ranked public high schools in the state, Compo Beach access, and a downtown corridor that gives the town genuine cultural infrastructure.

Westport buyers should note that the town's strong appreciation history means assessed values can be higher relative to recent sale prices in neighborhoods that appreciated rapidly since the last revaluation. Request the current assessed value for any specific property before modeling your tax bill on the purchase price alone.

Stamford

Stamford runs in the mid-20s, reflecting the cost of funding a full city's worth of services including Stamford Public Schools across multiple campuses. On a $1.5M home, expect approximately $25,000 to $27,000 per year. On the entry end of the Stamford market, a $600,000 condo in Harbor Point generates an annual tax bill of approximately $10,200, which is more comparable to Gold Coast single-family equivalents than the headline rate suggests.

Stamford's tax burden is the primary reason it offers the lowest entry prices of any Gold Coast town. You pay more in taxes per dollar of home value than in Greenwich or Darien, but your purchase price is lower. The total housing cost math often balances more closely than the mill rate comparison suggests.

Norwalk, Fairfield, and Ridgefield

These three towns run in the high 20s, producing the highest effective tax burdens among the primary Gold Coast towns at comparable home values. On a $1.5M home in Norwalk or Fairfield, expect $27,000 to $30,000 per year. Ridgefield runs similarly.

The trade-off is purchase price. Norwalk and Fairfield both offer meaningfully lower home prices than Darien, Westport, or New Canaan. Ridgefield offers no Metro-North access but lower prices and the Aldrich Contemporary Art Museum and a walkable Main Street that rival any Gold Coast downtown. The buyers who land in these towns are often the ones who ran the full monthly cost comparison and found the lower purchase price more than offset the higher mill rate.

Wilton

Wilton's mill rate in the upper 20s is the highest among the primary inland Gold Coast towns. On a $1.5M home, annual taxes run approximately $29,000 to $32,000. Wilton compensates with Wilton High School in Connecticut's top three, Cannondale village character, and home prices that are lower than comparable Darien or New Canaan properties. Buyers who prioritize school quality and can absorb the higher mill rate find Wilton delivers strong value. Buyers who are focused on minimizing carrying costs should look at Darien or New Canaan first.

What Changes at Revaluation

Connecticut requires towns to revalue all real property every five years. If you buy a home several years into a revaluation cycle in a market that has appreciated significantly, your assessed value may be based on conditions from years earlier. This is a temporary advantage: your tax bill may be lower than you would expect based on your purchase price.

It evaporates at the next revaluation. If you buy a $1.5M home in a town that last revalued when comparable homes were worth $1.1M, your assessed value may be $770,000 rather than $1.05M. At a 17-mill rate, that is a $4,760 annual difference that disappears at the next revaluation cycle. Model your tax budget at the fully valued rate, not the current one, and treat any underassessment as a temporary discount.

The Full Monthly Housing Cost Calculation

Property tax is one of four carrying costs that should be in your monthly budget before any Gold Coast offer. The complete picture for a $1.5M purchase in Darien with 20 percent down at a current 30-year fixed rate:

• Mortgage payment (principal and interest): approximately $7,200 to $7,800 per month depending on rate
• Property taxes: approximately $1,500 to $1,600 per month in Darien ($18,000 per year)
• Homeowners insurance: approximately $300 to $500 per month for a $1.5M home
• Maintenance reserve: 1 to 1.5 percent of home value annually, or $1,250 to $1,875 per month equivalent

Total monthly carrying cost on a $1.5M Darien purchase: approximately $10,250 to $11,775. A buyer modeling only the mortgage payment is missing 25 to 35 percent of the true monthly cost. This is the number that matters for qualifying, for budgeting, and for comparing the purchase to continued renting in New York City.

For the equivalent analysis of how Connecticut property taxes work in the Farmington Valley, see Connecticut Property Tax Explained: What You Actually Pay in Every Farmington Valley Town.

How to Appeal an Overassessment

If your property is assessed at more than 70 percent of its actual fair market value, you have the right to appeal. The process begins with an informal review at the town assessor's office, typically in February following the October 1 assessment date. If the informal review does not resolve the matter, you can appeal to the Board of Assessment Appeals and ultimately to Connecticut Superior Court.

An appeal is worth pursuing if you can demonstrate through recent comparable sales that similar homes sold for less than your implied market value. On a $1.5M Gold Coast home, a successful appeal that reduces the assessed value by 10 percent saves approximately $1,800 to $3,000 per year depending on the town. Over a five-year revaluation cycle, that is $9,000 to $15,000. The informal hearing stage costs nothing beyond your time.

Frequently Asked Questions

How much is property tax in Greenwich CT?

Greenwich CT has one of the lowest mill rates in Fairfield County, typically in the low-to-mid 11 range. On a $1.5M home assessed at $1.05M, annual taxes run approximately $11,500 to $13,000. On a $3M estate, expect $23,000 to $26,000 per year. Greenwich's low rate reflects its large commercial tax base. The dollar amounts are still substantial by most standards, but the effective rate as a percentage of home value is the lowest on the Gold Coast.

What is the mill rate in Darien CT?

Darien CT's mill rate is typically in the mid-to-high 16 range. On a $1.5M home assessed at $1.05M, annual property taxes in Darien run approximately $16,000 to $18,500. The higher rate versus Greenwich reflects the cost of funding Darien's consistently top-ranked school district. Most families with school-age children find the math favorable compared to private school alternatives. Darien's rate has been relatively stable because the school funding model is entrenched and broadly supported by residents.

Which Fairfield County town has the lowest property tax rate CT?

Among the primary Gold Coast towns, Greenwich CT has the lowest mill rate by a significant margin, typically around 11 to 12 mills. New Canaan and Darien are next, in the 16 to 17 range. Westport runs similarly. The towns with the highest mill rates are Wilton, Fairfield, Norwalk, and Ridgefield, all in the high 20s. Greenwich's low rate does not mean the lowest dollar amount for all buyers. A $3M Greenwich home generates more tax dollars than a $900K Norwalk home at a much higher rate.

How do Connecticut property taxes compare to New York City CT?

Connecticut property taxes are significantly higher in effective rate than New York City residential taxes. NYC co-op and condo owners benefit from Class 2 assessment rules that cap effective rates well below market value, producing annual bills of $3,000 to $7,000 on properties worth $700,000 to $1.5M. In Connecticut, the same buyer pays 70 percent of market value at the full mill rate. A $1.5M Gold Coast home produces $12,000 to $30,000 per year depending on the town. Budget this difference before you model your monthly housing cost.

What mistakes do Gold Coast buyers make with property taxes in CT?

The three most common mistakes: modeling the tax based on the purchase price rather than the current assessed value (which may differ due to revaluation cycles); ignoring the tax when comparing monthly costs to renting in New York City; and not accounting for the tax increase that will occur at the next revaluation if the current assessment is below 70 percent of market value. See also: The One Thing Every NYC Buyer Gets Wrong About Moving to Connecticut for the full breakdown of underestimated costs.

Is buying in Norwalk CT cheaper than Westport CT when you factor in property taxes?

Norwalk has a higher mill rate than Westport but significantly lower home prices. On a comparable $900,000 purchase, Norwalk buyers pay approximately $16,000 per year in taxes versus Westport buyers paying approximately $11,000 at a lower mill rate. However, a comparable home in Westport at a 4-bedroom level costs $400,000 to $700,000 more than in Norwalk. The total monthly cost including mortgage and taxes often favors Norwalk for buyers whose priority is monthly cash flow. See the full town comparison at Every Gold Coast Town Ranked for NYC Commuters.