A homeowner in Fairfield opened their tax notice this summer and found the mill rate had dropped from 28.39 to 19.19, a drop of nearly a third. The instinct is to read that as a tax cut. It isn't. The town completed a state-required revaluation in 2025, which reset assessed values upward across the board, and the mill rate came down to offset that reset. Whether any single household's bill actually fell, rose, or stayed flat depends entirely on how that specific property's value moved relative to everyone else's, not on the headline number.
That single fact unravels a habit almost every relocating buyer brings to Fairfield County: comparing towns by their mill rate the way you'd compare listing prices. The rate alone tells you shockingly little about what you'll pay, and it can mislead you in opposite directions depending on whether you're comparing two towns or watching one town over time.
The Number Everyone Misreads
Connecticut expresses property tax as mills, where one mill equals a dollar of tax per thousand dollars of assessed value, and assessed value is set at 70 percent of a town's appraised fair market value. Multiply the two together and divide by a thousand, and you get the bill. That's the whole formula, and it looks simple enough that buyers treat the mill rate as a single, stable proxy for how expensive a town is to own in.
It isn't stable, because two separate town bodies control the two halves of that equation. The assessor's office sets assessed values through periodic revaluations, required by state law at least every five years. Separately, the Board of Finance or its equivalent sets the mill rate each spring based on the town's budget. Stamford's own property assessment office is explicit that these two processes are unconnected: the office can lower an individual's assessment while the finance board raises the mill rate to cover budget needs, and the homeowner's bill can still go up. Stamford's own 2022 revaluation pushed the town's grand list up an estimated 18 percent, which is the same mechanism now playing out in Fairfield three years later.
Three things determine your actual bill, and only one of them is the mill rate:
- Your assessed value, set at 70 percent of appraised value, which resets in revaluation years and can lag or overshoot the current market in between
- The mill rate, set annually by the town's finance board based on that year's budget
- Whether you appeal, since Connecticut gives homeowners a window after a revaluation notice to challenge the assessment with the Board of Assessment Appeals
A falling mill rate in a revaluation year isn't good news by itself. A rising one isn't necessarily bad news either. They're answers to different questions.
Same Summer, Three Towns, Three Directions
This year's budget season put that on full display. Norwalk's Board of Estimate and Taxation just finalized its mill rates for the fiscal year that began July 1, 2026, and homeowners across the city's six taxing districts are facing increases of roughly 3 percent, according to reporting from Nancy on Norwalk, the city's independent local news outlet. That's actually a smaller increase than the mayor's office originally proposed, which ran as high as 4.9 percent in some districts before the board scaled it back.
In the same budget cycle, Greenwich proposed cutting its rate from 11.59 mills to 10.12, and Bridgeport's mayor proposed lowering the city's rate from 43.45 mills all the way down to 27.75, per the same reporting. Three towns in the same commuter belt, moving in three different directions in the same season, for three different reasons tied to each town's own budget and grand list growth.
Here's where those rates stood as the 2026 budget cycle played out:
| Town | Recent Mill Rate | What's Happening This Cycle |
|---|---|---|
| Greenwich | 11.59 | Proposed cut to 10.12 |
| Darien | ~14.20 | No update found in current reporting |
| Westport | ~16.86 | No update found in current reporting |
| Fairfield | 19.19 | Just reset via 2025 revaluation, effective the July 2026 tax year |
| Stamford | 23.27 | Confirmed current rate, synced from Connecticut Open Data in July 2026 |
| Norwalk | Rising roughly 3 percent from last year's base | FY2027 rates just finalized by the Board of Estimate and Taxation |
| Bridgeport | 43.45 | Proposed cut to 27.75 |
Darien and Westport haven't shown up in current budget reporting the way Norwalk, Greenwich, and Bridgeport have, so treat those two figures as the most recent confirmed rates rather than this year's final word. Every one of these numbers is set town by town, since Connecticut abolished county government back in 1960 and left each of its 169 municipalities to fund its own schools, police, and public works independently.
Why the Richest Towns Charge the Least
The pattern across that table looks backward at first. Greenwich, the priciest town in the county, has one of the lowest mill rates in the state. Bridgeport, among the least expensive places to buy in Fairfield County, has one of the highest. That's not because Greenwich residents get a discount and Bridgeport residents get penalized. It's because the mill rate is a function of the size of the tax base it's spread across, not a judgment about affordability.
A town's total assessed property value is called its grand list, and a low rate applied to an enormous grand list can raise the same money as a high rate applied to a small one. Greenwich's grand list runs into the tens of billions of dollars, so a rate under 11 mills still funds full municipal services. Bridgeport's grand list is a fraction of that size, so it takes a rate four times higher to raise comparable revenue per capita. The mill rate isn't measuring how much a town charges its residents. It's measuring how much property value that town has to spread the bill across.
The Same House, Six Towns
To see the rate effect in isolation, take an identical, imaginary $400,000 house and place it in each town, applying Connecticut's 70 percent assessment ratio to get to $280,000 of assessed value in every case:
- Greenwich at 11.59 mills: about $3,245 a year, or about $2,834 if the proposed 10.12 rate passes
- Darien at roughly 14.20 mills: about $3,976 a year
- Westport at roughly 16.86 mills: about $4,721 a year
- Fairfield at 19.19 mills: about $5,373 a year
- Stamford at 23.27 mills: about $6,516 a year
- Bridgeport at 43.45 mills: about $12,166 a year, or about $7,770 if the proposed 27.75 rate passes
Same house, same assessed value, and the bill still swings by roughly $9,300 a year depending purely on which side of a town line it sits. No buyer is shopping for a $400,000 house in Greenwich, of course, which is exactly the point of holding the price constant. Once you plug in real prices, the story gets more interesting rather than less. Fairfield's median sale price hit roughly $1,072,500 in early 2026, according to a market report referenced by local brokers, still trading at a real discount to Westport and Darien, where comparable product routinely clears $1.5 million to $2 million. A buyer priced out of those two towns and landing in Fairfield isn't just buying a cheaper house. They're buying into a meaningfully lower rate on top of it, and that gap compounds every year they own the home.
The Four-Year Wrinkle Buyers Miss
Connecticut's revaluation cycle creates one more quirk worth knowing before you sign anything. Some towns, including Norwalk, choose to phase in the assessed value increases from a revaluation over several years rather than applying them all at once. Norwalk's last revaluation was in 2023, and the city phased those increases in over four years rather than resetting assessments immediately. That means a buyer who closes in Norwalk this year isn't necessarily locking in a stable assessed value. The number can keep climbing on its own schedule for the next few years, independent of anything the mill rate does, simply because the phase-in hasn't finished working through the system yet.
That's a detail worth raising with whoever is running your numbers before you finalize a budget on a Norwalk purchase, since the assessed value on day one may not be the assessed value three years in.
What the Federal Tax Code Just Changed
One more variable moved in 2025 that changes how these town-to-town gaps actually feel to a buyer's wallet. The federal deduction cap for state and local taxes rose from $10,000 to $40,000 starting with the 2025 tax year, which means many Connecticut homeowners who itemize can now deduct a much larger share, and in many cases the full amount, of their property tax bill. That doesn't erase the differences between towns shown above, but it does mean the after-tax gap between a high-rate town and a low-rate one may be smaller than the raw mill rate comparison suggests, especially for buyers who previously hit that lower cap. Anyone weighing this heavily should run the specific numbers with a tax professional rather than relying on a rule of thumb.
The Actual Comparison That Matters
None of this means mill rate is meaningless. It means it's the wrong unit to compare across towns and the wrong signal to read in isolation during a revaluation year. The number that actually matters is the projected bill on the specific assessed value of the specific house you're considering, checked against that town's current rate and its place in the revaluation cycle, not the rate on its own and not last year's number carried forward as if nothing changes.
For a buyer comparing Fairfield, Norwalk, and Stamford, or weighing whether Greenwich's proposed cut makes this the year to act, that comparison depends on details specific to each address and each town's budget calendar. That's the conversation worth having before you write an offer, not after.
FAQ
Does a lower mill rate mean I should rule out higher-rate towns? No. A high mill rate on a lower-priced home can still produce a smaller annual bill than a low mill rate on a much higher-priced one. Run the actual dollar figure for the specific house, not just the rate.
How do I find the projected tax bill before I make an offer? Pull the current assessed value from the town assessor's records, apply the current mill rate, and ask specifically whether that town is mid-revaluation or mid-phase-in, since either one can change the number within a year or two of your purchase.
Can I appeal my assessment after I buy? Yes. Connecticut gives homeowners a window after a revaluation notice, generally running into the winter following the reval, to file with the Board of Assessment Appeals. Deadlines and procedures vary by town, so confirm the current schedule with your town's assessor.
Comparing towns on tax burden alone is only half the picture, and the other half changes by budget cycle. If you're weighing Fairfield against Stamford, or timing a Greenwich purchase around this year's proposed rate cut, Sunbelt Realty can walk through the actual numbers on a specific address with you. Schedule a tour, call or text Juan Carlos today.
