Who is responsible for the sewer line depends on which part of the pipe failed: in most of central Indiana, the homeowner owns and maintains the pipe from the house all the way to the public main, and the utility owns the main itself. That surprises a lot of people, because part of the homeowner's pipe usually runs under the yard, the sidewalk, and sometimes the street. Indiana Flow is a family-owned plumbing company run by Omar and Ahmad Saltagi, licensed in Indiana under PC12000053, and we field this question every time a main line backs up. Call 317-463-3569 if you are not sure whose problem you have.
Where the Homeowner's Sewer Line Ends and the City's Begins
Every house connects to the public sewer through a single private pipe. Inside the home, the drains from your sinks, tubs, toilets, and washer all feed into one building drain. That drain leaves through the foundation wall or floor and becomes the pipe that carries everything out to the street.
The dividing line is usually the point where your pipe joins the public sewer main, often called the tap or the connection. Everything upstream of that joint is private. Everything downstream, the main and the manholes, belongs to the utility. Because sewer mains typically run down the middle of the street or along the back of the lots, the private section can be 50 to 150 feet long and cross ground the homeowner does not otherwise maintain.
A cleanout, the capped pipe you may see sticking out of the yard near the house or by the curb, does not mark the property line. It is an access point for clearing and inspecting the pipe, and the pipe on both sides of it is still yours in most cases.
What a Sewer Lateral Is and Why It Fails
The sewer lateral is the technical name for that private pipe between your house and the main. Utilities use the word in their rules, and you will see it on permits and repair estimates, so it is worth knowing.
Laterals in older Indianapolis neighborhoods were commonly laid in clay tile or cast iron. Clay joints separate and let roots in. Cast iron corrodes from the inside and eventually scales over or cracks. Newer homes usually have PVC, which holds up far better but can still sag or separate where the soil has settled. The common failures look like this:
- Root intrusion: tree roots find the moisture at a loose joint, grow inside, and catch paper and grease until the pipe blocks.
- Bellies and sags: a low spot holds standing wastewater and solids, so the line backs up again a few weeks after every cleaning.
- Cracks and collapse: age, heavy equipment, or shifting soil breaks the pipe, and dirt starts washing in.
- Offset joints: two pipe sections slip out of line, leaving a lip that snags waste.
How Local Sewer Utilities Split the Pipe
In Indianapolis, the wastewater system is run by Citizens Energy Group. Its general rule is that the property owner is responsible for the lateral from the building to the connection at the public main, including any portion that runs under the right-of-way. The utility maintains the main itself.
The suburbs are not all served by the same utility. Carmel, Fishers, Noblesville, Westfield, Zionsville, and McCordsville each have their own sewer provider or contract, and the exact line can differ, for example on who handles the tap or a cleanout at the curb. Before any digging, call the number on your sewer bill and ask two questions: where does my responsibility end, and do you need to be present when the connection is exposed?
Whatever the split, the repair still needs a permit. Indiana Flow handles that paperwork on every sewer line repair and replacement job we do, so the work is inspected and on record if you ever sell the home.
Who Pays When the Main Line Backs Up
If the blockage or break is in the lateral, the homeowner pays for the repair. That includes the cost of digging up and restoring a sidewalk or a section of street when the damage sits under the right-of-way, which is why a camera inspection before the shovels come out matters so much.
If the problem is in the public main, the utility fixes it at no cost to you. The usual sign is that several houses on the street back up at once, or sewage rises in your floor drain after a heavy rain while your own fixtures were barely in use. Call the utility first in that situation.
Standard homeowners insurance policies often exclude wear, tear, and root damage to a lateral, and many treat sewage backup as a separate add-on. Read your policy, or ask your agent about a service line or water backup endorsement, before you need it.
Finding the Break Before You Pay for a Repair
The only way to settle whose problem it is, and what it will cost, is to look inside the pipe. We run a waterproof camera from a cleanout or through a pulled toilet down the lateral, record the footage, and mark the depth and distance of every defect from the surface. That tells you whether the damage is in your pipe, at the tap, or out in the main.
If it is a simple clog with sound pipe, a cable or jetting through our drain repair service may be all you need. If the camera finds a break or a belly, we price a spot repair or a full replacement in writing with Good/Better/Best options, and 0% financing is available through Wisetack and Klarna.
Indiana Flow is open Monday through Friday, 8am to 5pm, and every job carries a 1-year labor warranty. If sewage is coming up into the house after hours, stop running water, keep everyone away from the backup, and call us first thing in the morning. You can also read more about the homes we serve on our Indianapolis plumbing page, or call 317-463-3569.
Frequently Asked Questions
Does the city fix sewer lines?
The city or sewer utility fixes the public sewer main, but not the private lateral that runs from your house to that main. In Indianapolis, Citizens Energy Group maintains the main, and the homeowner pays to repair the lateral, even the portion under a sidewalk or street. Call the utility first if several homes on your street back up at the same time.
What is a sewer lateral?
A sewer lateral is the private pipe that carries wastewater from your house to the public sewer main. It usually runs under the yard and often under the sidewalk or street, and in most central Indiana communities the homeowner owns it from end to end.
Is the sewer pipe under the sidewalk my responsibility?
Yes, in most cases the section of your lateral under the sidewalk is the homeowner's responsibility. Rules vary by utility, so confirm with the provider on your sewer bill before work starts.
How do I know if a sewer backup is my line or the city's main?
A camera inspection is the most reliable way to know whether a backup is in your line or the city's main. If several neighbors back up at the same time, the main is the likely cause and the utility should be called first; if only your home is affected, the problem is usually in your lateral.
Does homeowners insurance cover sewer line repair?
Standard homeowners insurance usually does not cover sewer line repair caused by age, wear, or tree roots. Some insurers sell a service line or water backup endorsement that does, so check your policy or ask your agent.