When Is the City Responsible for Sewer Lines?

In most homes, the city is responsible for the public sanitary sewer main, and you’re responsible for the sewer lateral that runs from your home to that public line. Local ordinances, municipal code, and the cause of the problem can override that default split.

If sewage is actively backing up, stop using fixtures and call the city or a plumber immediately for emergency sewer line repair. Who is responsible for the sewer line repair when things go wrong depends on where exactly the plumbing issue originates.

How Sewer Responsibility Is Divided

To figure out who’s responsible for what, it helps to understand how your sewer system is laid out.

Your property line is where your lot legally ends. The public right-of-way is the strip under the sidewalk, curb, or street that the city controls. The cleanout is the capped access pipe plumbers use to inspect or clear the line. The tie-in, or connection point, is where your sewer lateral joins the city’s sanitary sewer main.

City Sanitary Sewer Main

The sanitary sewer main takes the wastewater from several houses and carries it to the municipal wastewater treatment plant. Any issues with the main line itself are usually the city’s responsibility, including removing clogs and fixing burst pipes. In many cities, the public sewer main is city-owned, but local rules can differ.

Getting a current property survey can help you pinpoint exactly where your property ends and the city’s responsibility begins. Knowing exactly where your property lines are may go a long way towards determining what, if any, responsibility you have for the repairs.

Your Sewer Lateral

If the sewer issues stem from the sewer lateral that runs off the main line, especially if it’s clearly on your property, plumbing repair becomes your responsibility. In these cases, it’s generally attributed to a plumbing “user error” on your part, such as flushing stuff that shouldn’t be flushed (only waste and toilet paper, please) or pouring cooking grease down the kitchen sink. There are other causes for sewer problems, but if it’s a problem with just your lines, and on your property, then you’re the one who shoulders the financial responsibility.

There are two sections of the sewer lateral: the upper lateral, which carries waste from your home to the property line, and the lower lateral, which runs from the property line through the public right-of-way to the connection point at the main sewer. While this section of the sewer pipe technically may sit outside your property line, you may still be responsible for damage to this area, especially if the damage is due to clogs in the pipes or from tree root systems exerting pressure on the pipes and joining seams.

When the City Is Responsible for Sewer Repairs

The main sewer line belongs to the city, and it’s their job to complete most repairs. That means you won’t usually need to pay for those repairs. Local ordinances and municipal code can still override the default ownership split, so it’s always smart to confirm the rule where you live.

The following examples show cases where the city will likely be responsible:

• Repairing a leaking public sanitary sewer main.
• Clearing a blocked public sewer main caused by other users.
• Handling ongoing maintenance of the public sewer main.
• Addressing damage tied to city negligence.
• Fixing problems caused by a failure to maintain the public sewer main.
• Correcting an improper installation of the sewer connection or tie-in.
• Responding to backups that originated in the public sewer system.

There are a few exceptions worth knowing about. If the sewer line is on your property and the damage was caused by tree root incursion or other things you could have prevented, the city might demand you pay for the work.

How to Prove the City Is Responsible for a Sewer Backup

If you think the backup came from the public system, gather proof before cleanup or repair work changes the evidence. A short checklist can make a city claim much easier to support.

• Get sewer camera footage from a sewer camera inspection showing where the blockage or break starts.
• Ask the plumber for written notes about the source of the backup and the likely cause.
• Take photos of the backup, the affected rooms, and any visible damage.
• Confirm the cleanout location and whether it sits before or after the connection point.
• Save all city correspondence, case numbers, work orders, and claim forms.

What Causes Sewer Backups?

Some common causes of sewer backups include:

• Clogs: Your sewer lines can become blocked if you flush things you shouldn’t. It also can happen naturally over time, with debris building up on the inside of the pipe.
• Tree roots: Mother Nature damages sewer lines when tree roots grow through the pipes. This situation damages the pipe and often causes clogs as waste gets caught in the roots.
• Old age: Old sewer pipes may deteriorate, which causes them to collapse or break.
• Damage: Newer pipes can also be damaged and cause backups. This might happen if the ground shifts or if the pipe gets hit by construction equipment while you’re renovating.
• Main sewer line issues: When the main sewer line has issues, such as a clog, damage, or an excessive amount of water from heavy rainfall, it could create a sewer backup.

When Sewer Repairs Are Your Responsibility

Sewer repairs are your responsibility if:

• The issue is with the upper sewer lines that carry waste from your property to the pipes in the street.
• The issue is with the lower laterals, which collect waste and transport it to the main sewer.
• The main sewer line on your property has been damaged by something within your control.

So, if you’ve flushed non-degradable wipes down the toilet and clogged your own pipes, that’s your job to fix. It may also be your job to fix the main sewer line if you’ve been digging up your driveway and damaged it, even though that pipe isn’t your property.

Depending on the damage, your repair options may include cleaning, spot repairs, trenchless sewer line options or full sewer line replacement.

Will My Insurance Cover Sewer Line Repair?

When you choose a homeowner’s insurance policy or renter’s policy, check your coverage for sewer line repairs. Sewer backup or line repair coverage often requires an endorsement or rider instead of being included automatically. In some cases, an insurance adjuster may ask how the problem was caused. Did you flush too many baby wipes and feminine hygiene products down the toilet, for example? In other cases, the problem may be covered if the cause is determined to be from an outside agency.

A sewer camera inspection can also help document where the damage starts and whether the problem involves your sewer lateral, the connection point, or the public main. If you’re facing a major repair, ask whether your policy covers cleanup, excavation, and sewer line replacement.

It’s always best to discuss the financial responsibility for common problems before taking out an insurance policy. If you’re renting, check your lease for plumbing responsibility, and if it looks like you’re responsible for some of it, ask for a renter’s insurance policy that covers unexpected emergencies.

How to Prevent Sewer Line Issues

You can take steps to keep your sewer lines in good shape, including:

• Watch what you flush. Avoid flushing anything other than waste and toilet paper.
• Protect drains. Keep grease, food particles, and other items from going down kitchen and bathroom drains.
• Schedule an inspection. At bluefrog Plumbing + Drain, we offer video inspections to see what’s going on underground. We can spot early issues before they cause a backup.
• Clean the lines. While we’re there, we can hydrojet your lines to clear any buildup in the pipes.
• Install a backwater valve. This can help reduce the risk of a public-system backup entering your home.

Know Your Responsibility Before Problems Start

Even if your plumbing seems to run smoothly, you should know who’s responsible when it doesn’t. In most cases, the homeowner is responsible for the sewer line from the house to the street. But even when the city sewer line is clogged, the repair costs could be assigned to you, depending on what, exactly, caused them.

Sewer clogs and the resulting plumbing repair can be expensive. It’s important to understand what your responsibilities are, when homeowner’s insurance covers the bill and, if you’re a tenant, whether it’s yours or the landlord’s responsibility to fix problems. Luckily, the team at your local bluefrog Plumbing + Drain is here to help, even for after-hours emergencies. If you need a sewer line repair specialist, schedule a service appointment with your local bluefrog Plumbing + Drain expert.

Frequently Asked Questions

When Is the City Responsible for a Sewer Line Under the Street?

The city is usually responsible for the public sewer main under the street, especially after the connection point where your sewer lateral ties into that public line. But local ordinances can make the homeowner responsible for part of the lower lateral, even when that pipe runs under the public right-of-way.

Is the City Responsible If My Sewer Backs Up Into My Home?

Sometimes, yes. If the backup originated in the public sewer system, or if city negligence, poor maintenance of the public sewer main, or an improperly installed sewer connection caused the problem, the city may be responsible. You’ll still need proof of where the backup started.

Who Pays If the Blockage Is in the Lower Lateral?

In many areas, the homeowner pays if the blockage is in the lower lateral. That’s true even though part of that line may sit in the public right-of-way. Local ordinances, municipal code, and the cause of the damage can change that answer.

How Do I Prove the City Caused the Damage?

Start with a sewer camera inspection, plumber notes, photos of the backup, and the cleanout location. Then keep all city correspondence and claim paperwork. The goal is to show that the blockage, break, or overflow started in the public system rather than in your sewer lateral.

Does Homeowners Insurance Cover Sewer Line Repair?

It can, but many policies require a separate endorsement or rider for sewer backup or line repair coverage. Review your policy details, and ask whether cleanup, excavation, backups, and line replacement are included before you need to file a claim.