Old Lyme, CT Property Tax: The FY2025-26 Mill Rate, a 64% Revaluation, and the Beach Associations' Own Dues

How Connecticut Property Tax Works, in General Terms

Connecticut towns fund local budgets through a property tax built on two components: an assessed value for each property and a mill rate the municipality sets, where one mill equals $1 of tax for every $1,000 of assessed value. The mill rate is applied to the assessed value, not directly to a property's market or sale price, to produce the annual bill. Connecticut does not cap mill rates the way some other states cap annual property-tax increases - each municipality sets its own rate through its own annual budget process - so this page keeps that framing general rather than asserting a specific statewide limit that may not apply, or may not apply the same way, in Old Lyme.

Because assessed value and market value are not the same number, and because a town-wide revaluation resets every property's assessed value at once, a mill rate can move sharply in a revaluation year for reasons that have nothing to do with the town spending more or less money. That is exactly what happened in Old Lyme's 2025 revaluation cycle, described in detail below, and it is the single most important mechanic for a buyer to understand before comparing this year's rate to a prior year's rate.

The FY2025-26 Mill Rate: Approximately 16.2 Mills, and Why the Drop From 24.4 Is Not a Tax Cut

According to April 2025 budget-cycle reporting from LymeLine.com, Old Lyme's proposed mill rate for fiscal year 2025-26 was approximately 16.2 mills. That figure follows a 2025 town-wide property revaluation in which median property values reportedly rose by approximately 64%. The pre-revaluation mill rate is cited elsewhere at 24.4 mills, and on the surface a drop from 24.4 to roughly 16.2 mills looks like a large tax cut - it is not. The decline is a mechanical result of the same tax levy being divided across a much larger total assessed grand list after revaluation, not a reduction in the town's actual tax burden. A buyer comparing a 24.4 figure to a 16.2 figure should not read that gap as money saved; it is largely an artifact of the revaluation math, and the two numbers describe different assessed-value bases.

The clearer measure of actual burden, per the same reporting, is that the proposed post-revaluation rate of approximately 16.2 mills represented a 4.5% effective tax increase, after the town's Board of Finance voted - following what was described as much disagreement - to withdraw $800,000 from the town's rainy day fund specifically to offset the increase. Without that offset, the reported effective increase would have been 6.8%. Those percentages, not the headline mill-rate number, are the figures that describe whether the town's tax burden actually went up.

The revaluation did not raise every property's tax bill by the same amount. Approximately 2,200 of the town's roughly 5,500 households were reported to see above-average tax increases as a result of the revaluation, meaning a substantial minority of owners - not the whole town uniformly - absorbed a disproportionate share of the increase. A buyer evaluating a specific property should ask the Assessor's office how that property's assessment moved in the 2025 revaluation specifically, rather than assuming a town-wide average applies to it.

What Was Driving the Budget: A $45.39 Million Proposal and a $57.5 Million School Project

The proposed FY2025-26 town budget was reported at $45.39 million, a $3.28 million increase - 7.8% - over the prior year. Education costs made up the largest share of that increase: $31.52 million, up 6.72% year over year, driven in part by debt service on a $57.5 million multi-building school renovation project. A buyer trying to understand why the town's budget, and therefore its tax levy, grew in this cycle should look to that debt service and the broader education budget as the primary drivers, per this reporting, rather than to any single discretionary spending category.

Important Caveat: This Was the Proposed Rate, Reported at the April 2025 Budget-Hearing Stage

Every figure in the two sections above - the approximately 16.2 mill rate, the 64% median revaluation increase, the 4.5% and 6.8% effective-increase percentages, the $800,000 rainy day fund withdrawal, the 2,200-household figure, and the $45.39 million budget total - comes from April 2025 LymeLine.com reporting on Old Lyme's proposed FY2025-26 budget, at the budget-hearing and proposal stage. None of these figures has been independently re-confirmed here as the final rate adopted after Old Lyme's May 2025 town budget meeting, and none is presented as a current, re-verified 2026 figure. Town budgets and mill rates can and do change between a Board of Finance proposal and a final town meeting vote, and the actual current mill rate for any fiscal year after FY2025-26 is not addressed by this page at all.

Anyone who needs the confirmed, currently effective mill rate - for FY2025-26 as finally adopted, or for any subsequent fiscal year - should contact the Town of Old Lyme's Assessor's office directly and ask for the current mill rate notice, which is the only authoritative source for that figure. Nothing on this page should be used to calculate an expected tax bill for a specific property.

Private Beach Associations: A Second, Separate Layer of Local Assessments

Old Lyme's shoreline is organized into several private beach associations - Sound View Beach, Old Colony Beach, Miami Beach, Old Lyme Shores, White Sands Beach, Point O'Woods, and Hawks Nest Beach among them - each a separate, quasi-municipal entity distinct from Old Lyme town government itself. These associations levy their own local assessments or dues on top of the regular town mill rate, typically to fund road maintenance and other local infrastructure within the association's boundaries. This is a genuinely distinctive dual-tax-layer structure, broadly similar in spirit to beach-tax-association arrangements found elsewhere along the Connecticut shoreline, but Old Lyme's specific set of associations is its own distinct fact set and should not be assumed to match the details of any other town's associations.

No specific per-association dollar figure for any of these seven beach associations was confirmed in the research behind this page, so none is stated here. A buyer looking at a property inside Sound View Beach, Old Colony Beach, Miami Beach, Old Lyme Shores, White Sands Beach, Point O'Woods, or Hawks Nest Beach should budget for the likelihood of a second annual bill beyond the town property tax bill, and should get the current assessment amount directly from that specific association's own office, since each association sets and bills its own dues independently.

A Two-Tier Housing Character: Lyme Street's Historic District Versus the Beach Associations

Old Lyme's real estate stock splits broadly into two distinct characters that carry different tax and assessment considerations. The Old Lyme Historic District, centered on Lyme Street and listed on the National Register of Historic Places in 1971, anchors the town's historic, walkable downtown - a stock of older, architecturally significant homes distinct from the shoreline beach-association neighborhoods. The beach-association communities along the shore, by contrast, are subject to the additional local-assessment layer described above, on top of the same underlying town mill rate that applies to Lyme Street and every other property in town. A buyer should treat these as two meaningfully different property types within the same town, not interchangeable options, when comparing total carrying costs.

Home Values, for Context - Two Different Sources That Should Not Be Blended

Two different, methodologically distinct sources report Old Lyme home values, and they should not be averaged together or treated as confirming one another. The Census Bureau's American Community Survey (2020-2024, a five-year estimate) puts Old Lyme's median home value for owner-occupied units, as self-reported by owners, at $484,200. Separately, Zillow's page for Old Lyme (as of data through June 30, 2026) states an average home value of $690,556, up 11.4% year over year. The Census figure is an owner-reported median from a multi-year survey sample; the Zillow figure is a proprietary average-value estimate for a single point in time. The two numbers use different methodologies, different statistical measures (median versus average), and different time windows, so the roughly $200,000 gap between them should not be read as market appreciation or as an error in either source - it is a product of the two approaches being different tools measuring different things.

Where This Page Stops, and Who to Call Instead

This page does not state, and does not invent, any current 2026 mill rate beyond the reported FY2025-26 proposed figure of approximately 16.2 mills, the final mill rate as adopted after Old Lyme's May 2025 town budget meeting, any specific per-association dollar assessment figure for Sound View Beach, Old Colony Beach, Miami Beach, Old Lyme Shores, White Sands Beach, Point O'Woods, or Hawks Nest Beach, or a current home sale price or price-per-square-foot figure for Old Lyme. None of those were confirmed in the research behind this page.

Anyone who needs those figures should get them directly from the Town of Old Lyme's Assessor's office for the town mill rate and current mill rate notice, from the specific beach association's own office for its local assessment, and from a licensed tax professional before making any purchase, rental, or financial decision based on figures from this page.