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Sewer Main Installation Price

Most homeowners spend between $1,630 to $3,000 nationally.
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No one likes to deal with their sewer line, but it serves one of the most important functions of a working home. Carrying waste water from your home to the city’s sewer system, a faulty sewer main can seriously wreak havoc inside and outside your home. Nonetheless, sewer line installations or replacements are not as much as you’d assume and can be completed in just a few days.

See how much it costs to install a new sewer line in your town below. As always, if you need help with your sewer system project, ImproveNet can help you find reputable plumbers in your area.

National Install a Sewer Main Costs

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Median Cost


Minimum Cost


Maximum Cost
Average Range:


National Average Cost $2,595
Minimum Cost $75
Maximum Cost $6,764
Average Range $1,630 to $3,000
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How do we get this data? This info is based on 1371 cost profiles, as reported by ImproveNet members.

Table of Contents

  1. Sewer Line Installation Cost
  2. Sewer Main Cost Factors
  3. Cost To Hook Up To City Sewer
  4. Sewer Line Installation Cleanup Costs
  5. When To Install A New Sewer Line
  6. Sewer Main Basics
  7. DIY Or Hire A Plumber?
  8. Find A Sewer Main Contractor

Sewer Line Installation Cost

No two sewer line installations are the same. Some require minimal work with minimal materials. Other sewer main installs require lots of excavation and red tape to ensure everything is up to code. As such, it’s hard to pinpoint an exact price for a sewer installation. However, after analyzing over 1,300 sewer line projects, the average cost to install a sewer main is $2,500, with most homeowners paying between $1,900 and $2,900 to have a new sewer main installed.

While you may not be able to control everything, knowing all cost factors and understanding how each affects the bottom line will surely help you keep your final sewer line replacement price down.

Sewer Line Installation Cost

Sewer Main Cost Factors

Since our personal sewers connect to the city’s sewer system, it’s no wonder sewer main installation prices defer from project to project. Besides your pipe’s location, there are a few other cost factors one must be aware of before any sewer line installation or replacement:


Like any plumbing project, bigger projects demand bigger pocketbooks. For a sewer main, the distance between your home and the connector line will largely determine how big this project will be. Longer sewer lines require more materials and more time for installation. Therefore, the longer the sewer line that is needed, the more the project will cost.

Unfortunately, you can’t alter the location of your home or the connector line. As such, this is one cost you can’t decrease.

House Type

Most of us prefer a stand-alone house to a condo or townhouse, but sewer line installations present a unique benefit to those in the latter. If you live in a condo, townhouse or multi-family unit, the cost of a new sewer line could be shared, depending on the homeowner’s association. If it’s covered, you could shave off as much as 75% of that total sewer main installation cost.


Municipal permits are usually required for a sewer main installation. Contractors or plumbers typically take care of the necessary paperwork, but as the homeowner, it's ultimately your responsibility to ensure everything is handled properly.

The cost of a permit depends on the nature of the work and the cost of the project, and it often varies between jurisdictions. Usually, permit prices range from $398 to $1,561, with an average cost of $979.


While you can’t see it, there’s a lot going on below ground. Beyond concrete, if they’re directly above your sewer line, your plumber will have to work around bushes, trees, grass and more. Anything in the way has to be removed before a new sewer line can be installed. Depending on the work, you may have to call a mason or landscaper to complete all the work. This of course raises your new sewer line cost.

Existing Sewer Pipe

Sewer main replacement is a bit different than a sewer line installation in that the existing pipe does play a role in your final price. First off, removing old pipes may not be as easy replacing a modern sewer line. If the existing pipe is very old and you need to save costs by excavating less, ask your local plumber about the slip lining process. In this scenario, the plumber inserts a smaller pipe within an existing pipe. If it’s possible, slip lining could save you up to $1,000 off your sewer line installation.


We’ll jump into specifics later, but even after the new sewer line is installed, chances are, you’ll be left with a mess in and around your front yard. From replacing concrete or replanting your front yard, sewer line cleanup costs can add thousands of dollars to your total sewer main installation price.

Sewer Main Cost Factors

Cost To Hook Up To City Sewer

If you’re lucky, your sewer line will already be connected to the city’s sewer system. However, if you’re buying brand new construction, you may have to incur an additional hook up charge. Sadly, the cost to hook up to the city’s water and sewer line is not cheap. Prices range by city, sewer line size and distance to the street, but the cost to tie into a public sewer can bulge all the way to $20,000.

To get the most accurate price, call your city sewer’s department to get all the details and pricing options.

Sewer Line Installation Cleanup Costs

Working below ground is never fun, but for your contractor and your bank account. Sadly, in order to replace a sewer line, you have to dig, remove flowers and ultimately get your hands really dirty for a successful project. As such, beyond the actual replacement, other costs tend to follow a sewer line installation.

Some of the following expenses will be covered in your overall sewer main installation, but others will not. Therefore, before you hire any plumber, make sure they outline exactly what is covered in their contract.

  1. Land Clearing Cost: While the average land clearing cost is roughly $2,600, the cost to clear land for a sewer replacement is much less. If clearing land is not included in your sewer main project, don’t spend more than $375 on this portion of the project.
  2. Tree Removal Cost: If you can help it, we never recommend removing trees. Trees augment beautiful landscapes. Sadly, trees can get in the way of a sewer line replacement. In this scenario, you have no choice but to remove it. Removing tree roots costs roughly $300, but an entire tree removal may cost closer to $600.
  3. Re-Sodding or Replanting: Chances are, your sewer line and connector line will run through your front yard. For replacement, the plumber has to dig and basically tear up your yard. Once your sewer installer places your old sewer main, you have to fix up your yard. Re-sodding costs roughly $2/sf and seeding a small patch of land should not cost more than $450 (with hiring a landscaper.)
  4. Repaving: Hopefully, your sewer line does not go through your driveway, but if it does, your total sewer installation cost just went up. Repaving costs depend on the material. Prices range from $3/sf to $19/sf. See the average repaving costs by material.

Cost To Hook Up To City Sewer

When To Install A New Sewer Line

Believe it or not, sewer line repair prices are very similar to sewer line installations. Simply put, the only difference is the actual sewer line, which is a small expense compared to the labor involved. Nevertheless, there are scenarios where replacement is absolutely the right call to make:

  1. Consistent Clogs: We all have to clear a clog or two over the years. However, if your toilets constantly back up, a plumber already cleaned the sewer and he/she can’t determine anything wrong with your pipes or toilet, chances are, there is either a blockage in your sewer line or your sewer line is beyond repair. In this case, consider replacing your sewer main.
  2. Constant Flooding Around Home: Your yard should not flood, especially if there wasn’t a recent storm. If there is flooding around your home, chances are, you have a faulty foundation or sewer line. Pray for a sewer line issue, as it’s much cheaper to replace (see plumber costs). Ask your plumber for a repair first, but if this issue occurred before, you may need a sewer main replacement.
  3. Sewer Line Damaged: Tree roots can invade and intersect sewer line. Luckily, good plumbers can patch up small holes, but strong tree roots and old sewer lines do not mix. If the hole is large enough, you’ll have to replace your sewer line.
  4. Burst Pipe: Too much pressure can cause a sewer line to burst. If that is the case, most likely, you’ll have to install a new sewer line.

Just like any sewer line repair, talk to your city and homeowner’s association before you sign any contract. Chances are, they will cover a portion of the costs.

Sewer Main Basics

The role of properly functioning sewer main is simple. It carries waste water from your home to the city’s sewer system. If something is wrong, you either have to clear a clog, patch a hole or replace the sewer line.

Sewer mains are installed when a home is built. Over the years, tree roots, frost, soil movement and hard water can cause the pipe to deteriorate and require a replacement. In most cases, the initial installation of a sewer main will cost less than replacement. This is because driveways, sidewalks and landscaping are often placed atop of the sewer main. Sewer main installations require heavy equipment to be hauled onto your property and the entire process can take several days.

Sewer Line Installation Cleanup Costs

DIY Or Hire A Plumber?

We never want to deter homeowners from taking the DIY leap of faith, but sewer line replacements are not DIY projects. Sewer main installations require extensive planning and coordination with city inspectors and the utility company. Additionally, professional sewer main companies supply the needed heavy equipment and have the skills, such as soldering of pipes, to ensure nothing goes wrong. Sadly, if one mistake is made, you could ruin your foundation, disrupt the city’s sewer system or turn off the water supply to your neighbors. All these issues cost way more than a simple sewer main replacement.

Find A Sewer Main Contractor

No one likes to deal with plumbing issues. While sewer replacements are not common, they’re also not as expensive as many think. As such, many agree that a properly working sewer system is well worth the costs.

If you need help with your sewer main, ImproveNet can assist. If you think your sewer line isn’t 100%, let us help you find local sewer line contractors.

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