You should do a septic inspection once every one to three years to ensure you don’t have any issues. Learn about septic inspection costs before scheduling.
How Much Does Sewer Line Installation Cost? [2025 Data]
Normal Range: $1,426 - $5,758
Most people pay $3,466 to install a sewer line, but depending on materials and labor costs in your area, you may end up paying between $244 and $10,000.
How we get this data
Photo: Ursula Page / Adobe Stock
Photo: Ursula Page / Adobe Stock
Highlights
The length of the sewer line you need is the single most important cost factor to consider, as additional linear feet will drive up material and labor costs.
Copper sewer pipes are the most durable but cost 10 to 15 times more than standard materials like cast iron.
If you don’t already have a backflow preventer installed, local regulations may require one during the line replacement, potentially adding thousands to your total.
Consider permitting costs, which vary by location but can add hundreds to your labor and material costs.
The average cost of sewer line installation is $3,466 and ranges between $1,426 and $5,758. If your home is connected to a sewer system, it enables you to do the dishes, wash your hands, take a shower, or even just flush the toilet. Sewer lines connect to the main sewer drain and are the homeowner’s responsibility to install, repair, or replace when necessary.
Cost to Install a Sewer Line and Connections by Location
The cost to hire a local sewer pro to install a sewer line varies slightly by location since different cities set prices depending on local water resources and the current setup on your street.
Here are a few examples of what it might cost to install a sewer line in areas across the country:
| City | Average Cost |
|---|---|
| Boston | $2,420 |
| Miami | $1,760 |
| Chicago | $2,310 |
| New Orleans | $1,600 |
| Detroit | $3,420 |
| New York | $3,400 |
| Portland | $4,160 |
| Houston | $2,940 |
| Los Angeles | $4,130 |
| Dallas | $1,630 |
From one homeowner to another
I had another company design my septic system replacement, but Paul re-designed it to avoid having to remove a 50+ ft tall tree and added a drainage system for the water from the gutters. The old no-longer-up-to-code 2-cesspool septic system was replaced by a drainfield and Ecoflow septic tank. The work was done on the days I was told workers would be here (unlike the company that drew up the first set of specs), and Paul and Jon were always friendly and great to work with.
Review of PR Environmental Designs, Inc., in Chester Springs, PA
Cost to Hook Up to City Water and Sewer
Hooking your sewer connection up to the city’s water and sewer line costs anywhere from $500 to $20,000. The price varies greatly depending on local requirements. If you need to make any changes to your property to accommodate the hookup, there’s a good chance that you’re responsible for the cost of those improvements.
In some cases, your local municipality subsidizes some of the cost to connect to the public water and sewer lines. This assistance also depends on regional regulations and the complexity of the project. To know just how much you’ll pay, contact your local municipality.
Cost to Hook Up to City Water and Sewer
Hooking your sewer connection up to the city’s water and sewer line costs anywhere from $500 to $20,000. The price varies greatly depending on local requirements. If you need to make any changes to your property to accommodate the hookup, there’s a good chance that you’re responsible for the cost of those improvements.
In some cases, your local municipality subsidizes some of the cost to connect to the public water and sewer lines. This assistance also depends on regional regulations and the complexity of the project. To know just how much you’ll pay, contact your local municipality.
Sewer Line Installation Cost Factors
Photo: Stock PK / Adobe Stock
The main factors that affect the cost of sewer line installation are materials, labor, trenching, permits, and regulations.
Sewer Line Cost per Linear Foot
The average cost to install a sewer line ranges from $50 to $250 per linear foot. Sewer line pipes are typically about 5 inches in diameter and run underneath your yard from your house to the main sewer drain.
Materials
To install a sewer line, you’ll need to purchase the pipes that connect the main sewer drain to your home. New pipes cost approximately $3 to $20 per linear foot. Factor in the type of piping material to gain a closer estimate as to how much you’ll pay per linear foot by referencing the following chart:
| Piping Material Type | Best For | Average Cost per Linear Foot |
|---|---|---|
| Cast-iron | Replacing, newer materials are more viable | $2–$10 |
| Copper | Durability | $20–$30 |
| PEX | Extreme temperature resistance | $2–$5 |
| PVC | Affordability | $0.50–$5 |
Labor
You’ll also need to pay a licensed plumber to install the sewer line. While it might be tempting to cut costs, you should always leave projects like sewer line installation to the professionals. Labor for sewer line installation costs between $30 and $247 per linear foot.
Trenching
Depending on the state of any existing sewer line, you may also need to pay for trenching. The cost to dig a trench runs about $800 per 100 linear feet. The total expense depends on the length and depth of the trenches needed.
This price usually does not include removing landscaping or hardscaping before digging, so be sure to get a quote from your plumber before you begin.
You can save money on landscaping repairs if no-dig trenchless sewer repair is an option.
Backflow Preventer
To prevent backflow into your basement, you may need to install an overhead sewer, which costs between $8,000 and $10,000 on average. These pipes run above the ground to ensure that no waste flows in the wrong direction.
Sewer Cleanout
A sewer cleanout can cost between $500 and $2,000. Sewer cleanouts are access points for cleaning out clogs or inspecting the lines through the use of a camera. A two-way sewer cleanout costs up to $3,500 and requires more work—especially if you need major excavation work done to install the cleanout.
Permits and Regulations
You’ll also need to purchase permits to connect to the city sewer line. These permits range from $400 to $1,600, with an average cost of about $1,000.
The price may vary depending on local regulations, and homeowners are usually required to obtain the permits in advance of the project. If your city isn't in control of your installation, ask your plumber what you need to do. In some cases, plumbers or contractors may be able to obtain permits on your behalf.
Housing Type
Your housing type impacts how much the sewer line installation will cost you. Here’s a breakdown of the different housing types and the amount of coverage you may or may not have:
Single-family: You are responsible for the total cost of the sewer line installation.
Twin home: Both owners must negotiate who will cover the cost of the installation.
Duplex: The property owner covers the costs.
Townhome or condo: Your HOA may cover the expenses, but this coverage may include increased HOA fees.
Additional Costs to Consider
Additional costs may sneak up that could affect the total cost to install a sewer line on your property. Keep the following in mind as you budget for the installation.
Obstacles
Obstacles can make navigating a sewer line installation akin to following a winding—and costly— labyrinth. From tree removal services to driveway reparations, some obstacles are pricier than others. Here's a list of some of the most common hurdles you may face when installing a sewer line and the costs that come with such obstacles.
Boulder removal cost: $650 to $1,200 per boulder
Tree removal cost: $200 to $2,000 per tree
Pavement removal cost: $8 to $15 per square foot
Landscaping
The cost to landscape your yard after a sewer line installation can range anywhere from $1,200 to $6,200. This wide cost range boils down to the size of your yard, the extent of the sewer line, your landscaping design, and the landscaping materials.
Don't plant trees or anything with invasive root systems near a septic field because the roots can infiltrate your pipes, clog the system, or even rupture the pipes.
— Bethany Uribe, Division Manager/Estimator at ASAP Restoration LLC, Tempe, AZ
Repairs
If there’s something wrong with your sewer lines or if you’re experiencing a clog or blockage, you may need to get your sewer line repaired or replaced. Depending on the issue, sewer line replacement or repair costs are between $1,400 and $4,100.
Cost to Switch From Septic to Sewer
Switching from a septic system to a sewer system costs around $6,000 on average. You have to factor in several components to arrive at a cost estimate when you're making this switch, including:
| Component | Average Cost |
|---|---|
| Permits | $1,000 |
| Decommissioning | $500–$1,000 |
| New sewer line | $2,900 |
| Trench | $150–$200 per foot |
| New pipes | $1,050 |
Most Common Sewer Main Projects
According to Angi data, the largest percentage of homeowners looking to complete a sewer main project—nearly 33%—aren't sure what type of work they need. In those cases, a pro can offer recommendations. About 30% of homeowners report that they need sewer main repairs.
Why You Should Hire a Sewer Line Installation Pro
You should always hire a local sewer contractor to install your sewer line—this is not a DIY-friendly project. This task requires specialized knowledge and experience that the average homeowner just doesn’t have. Since a malfunctioning sewer line can lead to backed-up drains and costly repairs, it’s best to leave this home project to the professionals.
Here's why it's ideal to hire a sewer line installer
Installing a sewer line isn’t your average weekend project. It’s a major, high-stakes job that can turn messy (and expensive) fast if something goes wrong. That’s why homeowners need to lean on a licensed pro to handle it from start to finish:
Pros know exactly which permits are required and ensure the installation meets local building and plumbing codes.
Sewer lines must be installed at a precise slope to prevent backups, and a pro knows how to get this right so your system flows the way it should.
Trenching, boring, and pipe-laying require heavy machinery, which pros already have and know how to use safely.
A pro can assess soil conditions, existing plumbing, and potential obstacles, such as tree roots or utilities.
Pros know how to make tight, durable connections that resist shifting soil and long-term wear.
A properly installed sewer line reduces the risk of future clogs, backups, or costly repairs, giving you peace of mind for decades.
Next Steps: Finalize Your Project With a Pro
Be prepared to discuss the permitting process and coordinate required inspections.
Ask whether trenching, trenchless, or pipe bursting is best for your property (and why).
Ask how the pro plans to identify underground utilities before digging.
Discuss the types of pipe they recommend (PEX, PVC, ABS) and the expected lifespan of each option.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We’ve surveyed over 10,000 real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
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