Old Lyme's Beach Sewer Project Split in Two. Which Half Is Your Cottage On?

If you're touring a cottage in one of Old Lyme's beach communities this fall, the listing price is only part of the number you need. Depending on which side of a property line you're standing on, that cottage might also come with a five-figure sewer assessment that's either already been paid off, is being financed over the next two decades, or hasn't been triggered yet at all. Those are three very different financial pictures wearing the same shingled exterior.

This isn't a hypothetical. As of this spring, three of Old Lyme's four beach associations were preparing to break ground on new sewer construction, while the fourth was sent back to the drawing board after voters rejected the plan. The project has been moving for more than a decade, but right now it's moving at two very different speeds, and which speed applies to a given house depends entirely on its address.

Why These Four Neighborhoods Were Never Going to Stay on Septic

Sound View, Old Colony Beach, Miami Beach, and Old Lyme Shores share a layout problem that predates any of the current arguments about cost. Most of the cottages in these neighborhoods went up in the postwar decades on small lots designed for seasonal use, not for the septic systems modern health codes expect. Add rising groundwater from sea level change and decades of use by families who now live there year-round, and you get systems the state considers a genuine pollution source into Long Island Sound.

The Connecticut Department of Energy and Environmental Protection has been on this for longer than most current homeowners have owned their properties. A 2015 consent order targeted the town's own Sound View area, and a 2018 unified consent order pulled in the three private beach associations. Neither order gave anyone the option of doing nothing. The question was never whether sewers were coming. It was how the bill would get split, and that fight has consumed the better part of the last two years.

Two Speeds, One Town

Here's where it gets specific enough to matter for a buyer. In December 2025, Old Lyme voters rejected an additional $11.03 million in borrowing for the town's Sound View portion of the project, with the measure failing by a wide margin. That vote only covered Sound View and the adjacent Miscellaneous Area B, both of which fall under the town's own Water Pollution Control Authority. It did not touch the three private associations, which operate under their own governance and their own financing.

Those three associations kept moving. In late January 2026, DEEP gave Old Colony Beach, Miami Beach, and Old Lyme Shores the go-ahead to proceed independent of the town's stalled vote. By April, contracts were awarded and Old Colony's board chairman was telling local reporters he expected a shovel in the ground by June.

Meanwhile in Sound View, the town's WPCA lost four members after the referendum failed and shifted its posture entirely, moving toward well testing through the spring, summer, and fall of 2026 to determine independently whether the pollution concern is as urgent as DEEP has argued. That testing window we're currently inside as of this writing. Nobody in Sound View knows yet what the town's next move will be.

A home in Old Colony right now is inside a project that has funding, contracts, and a construction calendar. A home in Sound View is inside a question mark. Both are technically "Old Lyme beach property." Neither situation should be assumed from the other.

What an EDU Actually Costs You

The assessment mechanism across all four areas works the same way in theory: every property gets assigned a number of Equivalent Dwelling Units, or EDUs, and pays a share of construction costs based on that number. In practice, the dollar figure attached to one EDU has moved substantially and often.

Back in May 2025, the WPCA's own chairman estimated roughly $1,938 per year per standard EDU. By November, after actual construction bids came in rather than estimates, that number had climbed toward $3,100 per year, which works out to somewhere in the neighborhood of $62,000 over the full 20-year loan term for a single EDU, before connection fees and the cost of tying in your own house to the new line. A separate accounting that included those connection charges and hookup costs put the total closer to $67,000 for a standard property. Old Lyme Shores, which has consistently carried some of the highest per-unit estimates in the project, saw figures approaching $74,600 for its EDU assessment in earlier reporting.

And EDUs aren't distributed evenly. Some Sound View parcels on Hartford Avenue are assessed at 1.25 EDUs or more, several sit above 2.25, and at least one property is assessed as a full 3 EDUs. On Swan Avenue, more than a third of properties carry an assessment above the standard 1 EDU baseline. A vacant lot over 10,000 square feet can be assessed too, since the WPCA treats any buildable lot as eligible once sewer service reaches it. None of this shows up on a listing sheet. It shows up when you ask.

The Legal Ceiling Everyone's Arguing About

One reason these numbers have been so contested is a Connecticut statute that caps what a town can charge a property owner for a sewer betterment at the increase in value the sewer actually creates. That cap is the center of an ongoing dispute in Old Lyme. An appraiser hired by opponents of the project found in 2020 that sewer installation would raise residential property values by about 7 percent and commercial values by about 10 percent. A separate document prepared to support the project cited an outside real estate study claiming sewered shoreline homes can command as much as 25 percent more than comparable unsewered properties.

Those two figures don't agree, and that gap is exactly why Sound View residents have pushed back so hard on assessment totals that, by some calculations, exceed what the statutory cap would allow. If you're buying into any of these four communities, you're buying into a legal argument that hasn't fully resolved, not just a construction timeline.

What This Means If You're Looking at a Cottage This Fall

Old Lyme's median sale price sat at $769,000 in August 2026, with homes moving faster than a year earlier. None of that figure tells you whether the specific cottage you're considering carries a sewer bill that hasn't been paid off yet. Before you write an offer on anything in these four neighborhoods, get specific answers to a short list of questions:

1. Which of the four project areas is this property actually in? The line between Sound View and Miami Beach, for example, can run down the middle of a street.
2. How many EDUs is this specific parcel assessed at? Ask for the number, not an estimate.
3. Has the seller already paid the assessment as a lump sum, or is it being financed over the 20-year loan term? If it's financed, confirm with a title search and your closing attorney whether that remaining balance attaches to the property going forward.
4. If the property is in Old Colony, Miami Beach, or Old Lyme Shores, what does the association's current construction calendar say about when your street gets dug up?
5. If the property is in Sound View, has the town's 2026 well testing concluded, and has DEEP said anything new about a formal consent order?

These aren't questions a listing photo answers. They're questions a local agent who's been tracking this project through every referendum and every bid cycle can help you get in front of, before the number becomes a surprise at your own closing table.

Frequently Asked Questions

Does this affect every home in Old Lyme, or just the beach cottages? Only properties inside the four project areas: Sound View, Old Colony Beach, Miami Beach, Old Lyme Shores, and the adjacent Miscellaneous Area B. Homes along Lyme Street or elsewhere inland were never part of this assessment district.

If a seller already paid off the assessment, is the buyer in the clear? If the seller chose the one-time lump sum payment at hookup, that obligation is retired. If they've been paying over the 20-year term, don't assume anything. Have your attorney confirm through the title search whether the remaining balance is tied to the property or the individual owner before you close.

Could Sound View still end up paying, even after the referendum failed? It's possible. State officials warned in late 2025 that continued delay could lead to a formal consent order similar to the one already governing the three private associations, which would remove the town's ability to simply vote the project down again. The outcome depends on what the town's current well testing shows and how DEEP responds.

Sewer assessments are exactly the kind of detail that separates a smooth closing from a stressful one, and in a town where four neighborhoods are running four different playbooks at the same time, the only way to know your number is to ask before you're under contract. If you're considering a home in Old Lyme's beach communities, or trying to figure out what a specific address's assessment status actually is, Chris Maynard can help you get real answers before you make an offer. Let's Connect.