Do You Have to Replace a Lead Water Line Before Selling in Clarendon Hills?

A notice from the Village of Clarendon Hills lands in a homeowner's mailbox after a watermain break gets repaired down the block, or after a meter swap, or when the Village replaces a stretch of main near the house. The letter says the property's water service line has been identified as lead or galvanized. Nothing about the house has changed. The water is the same water it was last week. But the paperwork now exists, and paperwork like this doesn't expire when the homeowner stops thinking about it. It sits in a file, and it resurfaces the day that homeowner lists the house.

The instinct is to assume this means a plumbing project has to happen before a For Sale sign goes up. It doesn't. Illinois disclosure law has never required a seller to fix a known defect, only to tell the buyer about it in writing. The actual friction in Clarendon Hills isn't the line itself. It's a choice buried inside the Village's replacement program that most owners never realize they're making, and that choice outlives the sale it happened before.

The number that matters more than most sellers expect

The Village has been direct about the scope of this. Most homes in Clarendon Hills run on copper service lines, which don't carry the same lead concern. But 160 homes in the village currently have either lead or galvanized water service pipes, and every one of those addresses has already received a notice that the line needs to be replaced by the end of 2037, under a federal mandate the Village is required to follow.

Against a housing stock of roughly 3,300 units, that's a small slice of the village, not a crisis. But it isn't zero, and it isn't evenly distributed by age of the home the way a lot of people assume.

Why the year a house was built only partly predicts the line material

The village-wide median construction year in Clarendon Hills is 1982, which sits close to the point that matters here. Congress banned lead pipe and lead solder in new plumbing installations in 1986, and homes built after that point are far less likely to have a lead line running from the main to the foundation. Older subdivisions carry more variance. Stonegate, built between 1960 and 1973, and Blackhawk Heights, which spans construction dates from 1942 through 2007, both predate that federal ban by enough years that an original, never-replaced service line is more plausible there than in a home built in the 1990s or later.

None of this means a specific street or subdivision should be treated as a problem area. It means the age of a home's original plumbing installation, not its neighborhood, is the variable that actually predicts service line material, and a seller in an older section of town has more reason to check before listing than a seller in a newer one.

What the disclosure form actually asks

The Illinois Residential Real Property Disclosure Report is a 23-item checklist every seller of a one-to-four unit home fills out and hands to a buyer before a contract is signed. One line on that form, item 16, asks directly about lead water pipes. The seller's obligation under the statute is to answer based on actual knowledge, not to commission an investigation. But actual knowledge is exactly what the Village's own notice creates. Once a homeowner has that letter, guessing "I don't know" on item 16 is no longer accurate, and Illinois courts have treated inaccurate disclosure answers as grounds for a buyer to walk or sue, not just negotiate.

This is the part that catches sellers off guard. The notice arrives years before a listing goes up, gets filed away, and then resurfaces the moment a title company or attorney asks the seller to confirm the disclosure form is complete and accurate.

A lead line doesn't automatically mean lead in the water

The instinct to panic at item 16 is usually stronger than the facts support. Clarendon Hills draws its water from the DuPage Water Commission, which purchases Lake Michigan water from the City of Chicago, and the system adds orthophosphate specifically to coat the inside of aging pipes and keep lead from leaching into the water that reaches a tap. The Village's most recent mandated Lead and Copper Rule sampling, completed in September 2023, came back with a 90th percentile result of 2.19 parts per billion, more than 65 percent of tested homes showing no detectable lead at all, and not a single sampled location over the 15 ppb federal action level.

A homeowner with a lead service line can accurately disclose that fact on item 16 while also pointing a buyer toward the Village's public water quality reporting, which shows a system that has been meeting federal and state standards. Disclosure and reassurance aren't in conflict here. They're two different, both true, statements.

The decision that actually follows the house

Here's the mechanism that matters more than the line material itself. When the Village replaces a watermain and finds a lead or galvanized line running to a connected home, state law requires the water system to replace the entire line, including the portion that sits on private property. A homeowner can decline that free replacement. Doing so means signing a waiver, a form the Village keeps on file, acknowledging that the property owner chose to keep a known lead or galvanized line in place.

That waiver isn't a private arrangement between one owner and the Village. Illinois disclosure law treats a known unsafe condition or a known lead water pipe as something that has to be disclosed at every subsequent transfer of the property, not just the sale that happens to be pending when the notice first arrived. A homeowner who waives replacement today to avoid a construction disruption is creating a document that a future seller, possibly someone who bought the house without knowing any of this history, will need to track down and disclose.

The practical result is that the choice to accept or waive a free line replacement matters more at resale than the underlying question of whether the line is lead or copper. A homeowner who lets the Village complete the replacement removes the issue from every future disclosure form. A homeowner who waives it hands that paperwork forward.

What this means depending on where a seller sits on the calendar

The 2037 deadline gives this a longer runway than most people expect. A homeowner selling this year isn't being forced into a plumbing project by the state. The obligation that exists right now is honesty on the disclosure form, not a construction deadline. But a buyer weighing a long-term hold against a shorter one has a real reason to ask the question directly during due diligence, because a home that still carries a waived line in 2032 is closer to a mandatory conversation than one where the Village already finished the work.

For a seller who has already received the notice and hasn't decided whether to accept the Village's replacement, the practical move is to make that decision before listing, not after an offer is in hand. A completed replacement is one less item to explain during attorney review. A signed waiver isn't disqualifying, but it does mean the seller should be ready to walk a buyer through the same context the Village provides, including the water quality sampling that shows the broader system meeting federal standards.

A couple of questions worth settling before listing

How does a homeowner find out if their address is one of the 160? The Village maintains its service line inventory and Lead Service Line Replacement Plan through the Public Works Department, and both are posted on the Village's website. A homeowner who hasn't received a notice can still confirm their line material directly rather than guessing on the disclosure form.

What actually triggers the Village's notice? Three things, based on the Village's own posted policy: a watermain replacement on the block, a watermain break repair, or a replacement of the home's water meter. A homeowner who hasn't had any of those three events near their property may simply not have been tested yet, which is different from having a confirmed copper line.

Selling a house in Clarendon Hills with a lead service line notice in the file isn't a disqualifying event. It's a paperwork conversation that goes better when it happens early, with a clear answer on item 16 and the water quality context to back it up. If a notice like this has shown up at a property and it's not clear what to do with it before listing, Wenzel Select Properties can walk through what the Village's inventory means for that specific address and what belongs on the disclosure form when the time comes to sell.