A buyer touring two open houses on the same Saturday this fall sees two homes listed at $600,000. One sits in West Hartford. One sits in Avon. Same price, similar square footage, similar era of construction. On paper, it looks like a coin flip.
It isn't. The gap between what those two homes actually cost to carry each year runs past $6,000, and it has nothing to do with the mortgage. It comes from a line most buyers don't check until the closing disclosure lands in their inbox: the town's mill rate.
What Changed This Spring
West Hartford's Town Council voted 7-2 in late April to approve a $387.3 million operating budget for fiscal year 2026-27, and with it, a new mill rate of 46.77 for real and personal property, up from 44.78 the year before. For a home assessed at $350,000, that increase alone adds close to $700 in annual property taxes. Mayor Shari Cantor and five other councilors voted in favor; two Republican councilors voted no.
That 1.99-mill jump didn't happen in a vacuum. Every town on this list resets its rate on its own calendar, usually finalized between April and June, and this spring's cycle left West Hartford sitting further above its neighbors than it was a year ago. The gap a buyer sees this fall isn't the same gap they would have found touring the same towns last September.
The Math Nobody Runs Before Writing an Offer
Connecticut assesses real estate at 70 percent of market value, a rule set at the state level and applied the same way in every town. From there, each municipality sets its own mill rate, expressed as dollars owed per $1,000 of assessed value, and multiplies the two together to land on an annual tax bill.
The formula is simple. Assessed value equals 70 percent of market value. Annual tax equals that assessed value divided by 1,000, times the mill rate. A $600,000 home carries an assessed value of $420,000 anywhere in the state. What changes is the second number, and in Hartford County right now, that number swings by nearly 20 points depending on which side of a town line the house sits.
Six Towns, One Spring, Six Different Bills
Here's what that $420,000 assessed value actually costs across the towns Meghan works most closely with, using each town's fiscal year 2026-27 rate where one has been finalized:
| Town | Mill Rate (FY 2026-27) | Annual Tax on $600K Home |
|---|---|---|
| West Hartford | 46.77 | $19,643 |
| Wethersfield | 39.98 | $16,792 |
| Glastonbury | 33.81 | $14,200 |
| Simsbury | 33.67 | $14,141 |
| Avon | 31.80 | $13,356 |
| Farmington | 26.62* | $11,180 |
*Farmington's most recently confirmed published rate is 26.62 mills, set for fiscal year 2025-26. Confirm the current figure directly with the town before relying on it, since every town's rate resets annually and this year's cycle landed differently town to town.
Line those six numbers up and the spread on an identical $600,000 home runs from about $11,000 to nearly $19,700 a year. That's a difference of roughly $700 a month between the highest and lowest rate on this list, on a home that costs exactly the same to buy.
Why the West Hartford Number Moved the Most
Simsbury's path this spring shows how much can shift inside a single budget season. The town's Board of Finance initially proposed a rate of 33.78 for fiscal year 2026-27, based on a $130.7 million budget package that passed by referendum on May 16 with roughly 5.8 percent voter turnout. After the state allocated additional education funding, the board used part of that money to lower the final rate to 33.67 at its May 19 meeting. That's a small move, about eleven-hundredths of a mill, but it shows the rate isn't locked until the last vote is cast.
Wethersfield's council landed at 39.98 for the same fiscal year, a figure the town posted directly on its own budget announcement. Avon's collector of revenue set the rate for Grand List 2025 at 31.80 for fiscal 2026-27, with bills mailed and payments due by early August.
West Hartford is the outlier not because its home values are wildly different from its neighbors, but because its budget grew faster and its council chose to fund that growth primarily through the tax rate rather than other revenue. A 1.99-mill increase sounds modest in isolation. Stacked against towns that moved less, or moved down, it becomes the single biggest swing factor in a town-to-town comparison this year.
What This Means If You're Comparing Towns This Fall
None of this means West Hartford is a worse place to buy, or that a lower mill rate signals a better deal. Mill rate reflects a town's budget divided by its grand list, not the quality of its schools or its services. A town with a large commercial tax base can fund the same services at a lower residential rate. A town in the middle of a school construction cycle may carry a higher rate for reasons that have nothing to do with home values.
What it does mean is that comparing two listings by price alone leaves out one of the largest fixed costs of ownership, and that cost varies by town in a way that compounds every single year you own the home. A few things worth doing before you make an offer across town lines:
- Ask for the property's actual assessed value from the town assessor's card, not an estimate. Assessed value is public record and takes the guesswork out of the math.
- Run the tax line using the current fiscal year's mill rate, not a figure pulled from a listing sheet that may be a year old.
- Add that number to your monthly carrying cost early in the comparison, alongside principal, interest, and insurance, rather than discovering it at the closing disclosure.
- If you're comparing a home in West Hartford to one in Avon or Farmington, treat the tax gap as a real number that affects your monthly budget, not a rounding error.
The mortgage payment is the number most buyers focus on. The mill rate is the number that keeps showing up every July and January for as long as you own the house.
A Few Common Questions
Does a lower mill rate mean I'm getting a better deal on the house itself? Not directly. Mill rate is a function of a town's budget and its grand list, the total assessed value of everything taxable within its borders. It tells you what you'll pay in taxes, not what the home is worth or how well it's built.
Will these rates change again before I close? Rates are set annually and hold for the full fiscal year, which runs July through June. Barring a supplemental budget action, the number you see for the current fiscal year should hold through the year, though it's always worth confirming with the town before closing.
What about towns not in this list, like Marlborough or East Hartford? Rates outside these six towns vary just as widely, and the same math applies. The formula doesn't change. Only the mill rate does.
If you're comparing towns and want the real math run on a specific address, not just the sticker price, that's the kind of side-by-side Meghan Girard puts together for buyers before they write an offer. Request Your Instant Home Valuation to start with your own numbers.
