If you've been comparing towns in Fairfield County this year, you've probably seen the headline: Greenwich just posted the lowest mill rate in Connecticut. Westport cut its rate by nearly a third. Fairfield's rate fell by almost as much. On paper, it looks like the best year for property taxes in a decade.
Ask the homeowners actually opening these bills and you get a different story. In Westport, town officials said plainly that many residents will pay more this year even though the mill rate dropped 30 percent. In Fairfield, the rate cut was accompanied by nearly 900 assessment appeals. A falling mill rate and a falling tax bill are not the same event, and the gap between them is the thing worth understanding before you use any of these numbers to compare towns.
The Revaluation Cycle Just Landed on Three Towns at Once
Connecticut requires municipalities to revalue taxable property, and towns don't run the cycle on the same calendar. This year, Greenwich, Westport, and Fairfield all completed revaluations that took effect for the 2025 grand list, and all three saw property values jump enough to force a mechanical reset of the mill rate.
Here's the part that gets lost in the headlines: a revaluation is designed to be revenue-neutral for the town as a whole, not for any individual homeowner. If a town's total grand list rises 26 percent, the mill rate has to fall to keep the same budget from generating a windfall. Greenwich's grand list did exactly that, rising an estimated 26 percent after the 2025 revaluation, and the town's Board of Estimate and Taxation ultimately set a mill rate of 10.12 for fiscal year 2026-27, down from 12.041 the year before, which town officials say gives Greenwich the lowest mill rate in the state. The budget behind that rate, roughly $542.4 million, still grew year over year and cleared the Representative Town Meeting on a 170-13-1 vote in May. BET Chair David Weisbrod, as quoted by the Greenwich Sentinel, called the process "feeling really great," a notably calm outcome after a budget season that has been contentious in past years.
None of that tells you what happened to any single tax bill. That depends on how much your specific assessment moved relative to the town average, and that number is different for every house.
What Changed, Town by Town
| Town | Prior Mill Rate | FY2026-27 Mill Rate | What Actually Drove the Change |
|---|---|---|---|
| Greenwich | 12.041 | 10.12 | 2025 revaluation lifted the grand list roughly 26 percent |
| Westport | 18.86 | 13.2 | Revaluation lifted the grand list more than 50 percent, but residential values rose far faster than commercial |
| Fairfield | 28.39 | 19.19 | Revaluation triggered nearly 900 assessment appeals |
| Darien | Mid-14s (sources vary) | 16.05 | No revaluation reset this cycle, budget grew to $191.9 million |
| New Canaan | 16.691 | 16.967 | No revaluation reset, grand list grew a modest 0.81 percent |
Read across that table and the real pattern shows up immediately. It isn't that Fairfield County had a good tax year. It's that three towns hit their revaluation reset at the same moment, and two didn't.
Why Westport's 30 Percent Rate Cut Didn't Cut Anyone's Bill by 30 Percent
Westport is the cleanest example of why the mill rate alone can mislead a buyer. According to Patch, the town's Board of Finance unanimously approved a rate of 13.2 for the current fiscal year, down from 18.86, after the grand list grew more than 50 percent. Finance Director Gary Conrad explained the mechanics behind that growth: residential property values rose an average of 59.55 percent in the revaluation, while commercial values rose only 16.55 percent.
That gap matters more than the headline rate. When one category of property appreciates much faster than another, the tax burden shifts toward whichever category grew the most, even as the overall rate falls. Large commercial parcels, the kind occupied by employers like Bridgewater Associates at its Nyala Farm headquarters, didn't see anywhere near the appreciation that single-family homes did. Town officials were direct about the consequence: most homeowners will still see higher bills this year, not lower ones, because their individual assessments outpaced the town average by enough to swamp the lower rate.
If you're comparing Westport to a neighboring town using the 13.2 figure alone, you're comparing the wrong number.
The Fairfield Appeals Rush: What Transaction Friction Actually Looks Like
As reported by Patch, Fairfield's revaluation produced the most visible version of this friction. The Board of Finance set the new rate at 19.19, a steep drop from 28.39, but getting there required working through a wave of pushback. Nearly 900 homeowners filed assessment appeals, and 77 percent of the appeals heard by the Board of Assessment Appeals resulted in a full or partial reduction. Board member Jim Walsh argued that volume amounted to a failure of the revaluation process itself. Board Chair Craig Curley pushed back, framing the high appeal rate as evidence the system worked as intended given how sharply residential values had climbed.
For a buyer, the practical lesson isn't about who was right in that argument. It's that an assessment can still be moving after the mill rate is finalized, particularly in a town that just went through revaluation. If you're closing on a Fairfield property this year, the assessed value on file may not be the final word, and that number feeds directly into what you'll actually owe.
New Canaan and Darien Show What a Normal Year Looks Like
The contrast towns make the pattern easier to see. New Canaan wasn't part of this revaluation cycle, having completed its own reset earlier, and its Board of Finance approved a mill rate of 16.967 for fiscal year 2027, up just 1.65 percent from 16.691. The grand list grew only 0.81 percent, which is ordinary incremental growth, not a valuation shock. Darien, also outside this cycle, saw its Representative Town Meeting approve a $191.9 million budget and a 16.05 mill rate on a 73-0-1 vote, another year of standard budget growth rather than a math reset.
Put side by side with Greenwich, Westport, and Fairfield, the difference is stark. The towns mid-cycle just had their tax math rewritten. The towns that already went through their reset are having a normal year. Comparing a "normal year" number to a "just reset" number without knowing which is which will give you the wrong read on which town is actually more or less expensive to hold property in.
What to Ask Before You Compare Two Towns
- When did the town last complete a revaluation, and is this year a reset year or a normal budget year?
- How did the specific property's reassessed value move relative to the town average, not just the headline mill rate?
- Did commercial and residential values move together in the last revaluation, or did one category outpace the other the way it did in Westport?
- Is there a pending assessment appeal on the property, since appeals can still change the final number after the mill rate is set?
A Few Questions Worth Asking Early
Does every Connecticut town revalue property on the same schedule? No. Each town runs its own revaluation cycle under state law, which is exactly why Greenwich, Westport, and Fairfield reset together this year while New Canaan and Darien did not.
If a town's mill rate falls, does that mean the town cut spending? Not necessarily. Greenwich's budget grew to roughly $542.4 million even as its mill rate fell, because a larger grand list let the town raise the same or more revenue at a lower rate.
If my assessment rose less than the town average, will my bill fall? Generally yes, but the final number depends on the adopted budget for that year and whether any appeal is still pending on the property.
Comparing carrying costs across Fairfield County towns takes more than lining up mill rates on a spreadsheet. It takes knowing which towns just went through a revaluation reset, which didn't, and how a specific property's assessment actually moved. That's the kind of analysis Brenda Colon builds into every buyer and seller consultation across Greenwich, Westport, Fairfield, Darien, and New Canaan. Book a complimentary market consultation to run the real numbers on the town and property you're actually considering.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
