Seaport Advisory

The list price tells you what a home costs to buy. It says nothing about what it costs to own — and in 2026, that second number is where Connecticut buyers get surprised. The same home, one town line apart, can carry a tax bill that differs by well over a thousand dollars a month.

The number most buyers never check

Everyone shopping for a home watches the price. Far fewer ask the question that actually sets the monthly payment: what’s the property tax? In Connecticut, the answer comes from the town’s mill rate — the dollars of tax charged per $1,000 of assessed value — and it varies more than almost anywhere in the country.

The mechanics are simple. Connecticut assesses every home at 70% of its market value, then applies the local mill rate. A $400,000 home has an assessed value of $280,000; multiply by the mill rate and divide by 1,000 for the annual tax. But because the rate ranges from under 11 mills to nearly 69 across the state, that simple math produces wildly different outcomes town to town.

The same $415,000 home, taxed across Connecticut

Take one home priced at $415,000 — near the statewide median — and drop it into each town without changing anything else. The tax bill is a different animal in every one.

Over a ten-year hold, that gap alone is the difference between about $32,000 and $200,000 handed to the tax collector — on identical houses. It’s the single biggest reason we tell buyers to underwrite the tax before they fall for the price.

Cheap to buy often means expensive to own

You’d assume the lowest-priced towns would be the cheapest to live in. Statewide, the opposite is frequently true. Measured as a share of what a home actually sells for — the true effective tax rate — many modest-priced markets carry the heaviest load, while some of the priciest carry the lightest.

The extremes tell the story: Washington taxes its homes at just 0.76% of value, the lightest in Connecticut, while Hartford reaches 4.83%, the heaviest. A dollar of home in Hartford carries more than six times the annual tax it would in Washington. Between those poles sit 167 other towns — and the table below lets you find any of them.

Every Connecticut town, ranked and searchable

Search for your town, filter by county, or sort any column. The bar beside each effective rate shows where that town falls on the statewide scale, from lightest (green) to heaviest (amber).

The tax that isn’t in the mill rate

Every figure above is the town rate. For roughly half of Connecticut, that is the whole bill. For the other half, it isn’t.

Connecticut has 320 special taxing districts spread across 89 of its 169 towns — fire districts, boroughs, sewer and improvement districts, beach and lake associations. Each levies on top of the town rate and bills separately, and most buyers never hear about them until a second envelope arrives.

Lakeridge is the extreme, but the effect is ordinary. In Groton, a house in the Poquonock Bridge Fire District pays 29.51 mills against the town’s 24.81 — moving its effective rate from 1.74% to 2.07%, which is the difference between a middling tax town and a heavy one. Neighbours on the same street can sit on opposite sides of the line.

Three things about districts catch people out:

They overlap. A parcel in the City of Groton can also sit in the Groton Sewer District. Stonington Borough and the Stonington Fire District are separate levies on ground that overlaps. You are not choosing one from a list; you can be in several, and they add together.

Some charge a flat fee instead of a rate. Nineteen of them bill a fixed dollar amount a year regardless of what the house is worth — $675 in Watertown’s Lake Winnemaug Association, $550 in Madison’s Lee Manor. A flat charge is regressive against a modest house and trivial against an expensive one.

They cluster where you least expect. Greenwich has twenty-nine districts, more than any other town in the state. Westport has sixteen, Branford fourteen, Stonington eleven. These are not struggling municipalities bolting on levies — they are places where private roads, beaches and sewers get funded parcel by parcel.

Find the districts in your town

Type a town to see every district OPM lists for it, with the rate each one adds. Whether a specific address falls inside one is a question only the assessor can answer — but this tells you whether there is anything to ask about.

Our Connecticut Property Tax & Affordability Tool lets you tick every district that applies to a parcel and adds them to the bill properly — including the flat-fee ones.

If you’re buying in 2026, watch the revaluation clock

A point of confusion we clear up constantly: your purchase price does not become your assessment. Connecticut doesn’t tax you on what you paid. You inherit the town’s existing assessment — 70% of appraised value from its last townwide revaluation — and that figure holds for the full five-year cycle.

Buying doesn’t trigger a reassessment of your one home. Instead, your sale becomes a comparable the assessor studies at the next townwide revaluation — so the price catches up on the town’s schedule, not at your closing. The “Next Reval” column above shows exactly when that clock strikes for each town. If yours reads 2026, assessments there are being recalculated to today’s market right now.

One exception worth knowing: New Milford assesses primary residences at 60% rather than the usual 70%. Same house, same mill rate, a materially lighter bill if you live there — and the full ratio if it’s a second home.

Our backyard: the southeastern shoreline

Close to home, the shoreline tells a clear story. The premium coastal towns — Lyme, Old Saybrook, Old Lyme, Stonington, Essex — carry high prices but remarkably light effective rates, near 1.0–1.3%. You pay more up front, far less to hold. The value markets and cities run the other way: lower entry prices, steeper annual carry.

And the shoreline doesn’t stop at the state line. If your search runs east into Rhode Island — Westerly, Watch Hill, Narragansett, Newport — the tax math changes entirely: Rhode Island assesses at nearly 100% of value, taxes homes and commercial property at different rates, and now adds a state surcharge on high-value second homes. We built a companion Rhode Island Property Tax & Affordability Tool for exactly that stretch of coast.

What this means for your move

If you’re buying, put the tax and the revaluation year into your underwriting from day one — not as a surprise at closing. Ask the assessor whether the parcel sits in a district before you write the offer, because that answer can move the monthly number by hundreds. Choosing the right town can be worth thousands a year on the same home. If you’re selling in a low-rate town with no district, that’s part of your home’s competitive story and belongs in the marketing. And if you’re weighing the shoreline against the value towns, know that you’re really choosing between a higher entry price with a light annual carry, or a lower entry price with a steeper one.

At Seaport Advisory, we weigh mill rates alongside median price, effective tax rate, district levies, revaluation timing, and local affordability to give you the full cost-of-ownership picture across Connecticut — so the home that looks affordable actually is.

Posted by Tim Bray · Seaport Advisory

Mill rates are the official Connecticut Office of Policy and Management FY 2025–2026 primary real property rates (Grand List of October 1, 2024), all 169 towns. Median sale prices reflect current Market Pulse data. Revaluation years are from the CT OPM schedule under Public Act 22-74, adjusted for town-level deferrals. Effective rates apply each town’s mill rate to its median sale price at the 70% assessment ratio and will differ for any individual home; New Milford assesses primary residences at 60%. Special taxing district rates are the OPM FY 2025–2026 published figures. Districts levy on top of the town rate, bill separately, and can overlap, so a single parcel may sit in more than one — and most parcels in a town with districts sit in none of them. Nineteen districts bill a flat annual charge rather than a mill rate, and six set a variable rate OPM does not publish as a single figure. Whether any district applies to a specific address is a question for the town assessor. Verify any figure with the assessor. Not tax or legal advice.