If you own a home in the Chicago area and something goes wrong with your sewer, one of the first questions you'll ask is: Do I have to pay for this, or does the city?
The answer catches a lot of homeowners off guard. In most Chicago-area municipalities, the section of sewer line running from your home out to the public main is your responsibility — not the city's. That includes the part buried under your yard, your driveway, your parkway strip, and in some cases, even the portion under the street itself.
Here's what that means in practice, and how to find out exactly where your responsibility ends.
Where the homeowner's line ends and the city's begins
Every sewer connection has two parts:
The service lateral is the pipe that runs from your home's plumbing to the public sewer main. It's the section you own.
The public main is the larger sewer line running under the street, typically owned and maintained by the municipality or a regional wastewater agency.
The point where the two connect is called the connection point or wye. In most Chicago-suburb municipalities, homeowners are responsible for the entire service lateral all the way to that connection, which often sits under the street or the parkway, well past the property line.
That's why a "small" sewer problem can turn into a big excavation project fast. Restoring a lateral under a street or sidewalk usually means permits, traffic control, pavement restoration, and coordinating with the municipality — costs that homeowners rarely budget for.
Why this matters more in older Chicago-area neighborhoods
The homeowner-owns-the-lateral rule applies almost everywhere, but it lands harder in the Chicago metro because of the age of the housing stock.
A lot of homes in Chicago and the older suburbs — Oak Park, Berwyn, Evanston, La Grange, Homewood, Flossmoor, and dozens of others — were built between the 1900s and the 1950s. Their laterals were installed in clay tile or cast iron. A clay pipe is prone to root intrusion at every joint. Cast iron scales and corrode from the inside. Both were engineered for a service life that most of these homes have long since exceeded.
If you own an older Chicago-area home, there's a good chance the lateral running to the street is original to the house. And because it's your responsibility, it's your problem to solve.
How to find out for sure — your municipality's specific rule
Ownership rules vary slightly by town. A few examples:
Some municipalities define the homeowner's responsibility as ending at the property line, with the town owning everything beyond that.
Others — and this is more common in the Chicago area — define the homeowner's responsibility as running all the way to the connection with the main, regardless of where that point actually sits.
A few communities in the region will cover repairs to the portion of the lateral under the public right-of-way if certain conditions are met.
The only way to know for certain is to check your municipality's public works or building department. Ask two questions:
- Where does the homeowner's responsibility end?
- Are there any cost-share or reimbursement programs for lateral repairs under the street?
Some homeowners are pleasantly surprised to find their town offers partial reimbursement. Most find out the whole run is on them.
What to do before you have a problem
If you own an older home, the smartest thing you can do is get a video inspection of your sewer line before something goes wrong. A camera inspection shows you exactly what condition the lateral is in — cracks, root intrusion, offset joints, scaling — and gives you time to plan a repair on your terms instead of scrambling during a backup.
For homes with clay or cast iron laterals, an inspection also lets you see whether the pipe is a good candidate for cured-in-place pipe lining (CIPP). Lining creates a new pipe inside the old one without digging up your yard or the street — which matters a lot when your lateral runs under a driveway, mature landscaping, or the road itself.
If a backup happens: what's covered, what isn't
If you experience a backup, the first question is where the blockage is. If it's in the city main, the municipality is responsible. If it's in your lateral — which is where most residential backups originate — it's yours.
Homeowner's insurance typically does not cover the repair of the lateral itself. It may cover damage inside the home caused by a backup if you carry a specific sewer backup rider, but the pipe is on you.
That's a topic worth its own conversation — we'll be covering it in a follow-up post.
The bottom line
If you own a home in the Chicago area, assume the sewer line from your house to the main is yours. If something goes wrong, the repair is yours to pay for and yours to schedule.
The good news is that lateral repairs don't have to mean tearing up your yard or your street. Trenchless methods like CIPP lining can restore an old clay or cast iron lateral in place, often in a single day, with minimal disruption.
If you're not sure what shape your lateral is in — or you've already had one backup and want to know what's coming next — the honest starting point is a camera inspection. No guessing, no upselling, no surprises.
Schedule a Sewer Camera Inspection
Or if you've already gotten a repair quote from another company and want a second set of eyes on it, we offer a Free Second Opinion on any sewer repair estimate.