Sewer Line Replacement Cost in Nashville: Full 2026 Pricing Breakdown
Quick answer: A full sewer line replacement in Nashville typically costs $5,000 to $29,000, depending mostly on how long your line is — not just which method you choose. A short 25-35 foot line runs roughly $1,700-$10,000, while a longer 75-100 foot line (common on larger suburban lots) can run $5,200-$28,750. Beyond the pipe itself, a full replacement often includes costs a simple repair doesn't: tie-in fees if multiple lines connect to your main, a backflow preventer, and sometimes converting from an old septic system to city sewer. This guide breaks down replacement specifically — for a method-by-method comparison of CIPP lining vs. pipe bursting vs. traditional excavation, see our companion cost guide.
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Full Replacement Cost by Line Length
The single biggest cost driver for a full sewer line replacement isn't the method — it's how far your line runs from the house to the street connection. Angi's national cost data shows this relationship clearly, and Nashville generally runs 10-15% above the national range due to Metro permit fees and urban utility coordination:
| Line Length | National Range (Angi) | Typical Nashville Range |
|---|---|---|
| 25-35 ft | $1,500-$8,750 | $1,700-$10,000 |
| 35-45 ft | $2,100-$11,250 | $2,400-$12,900 |
| 45-55 ft | $2,700-$13,750 | $3,100-$15,800 |
| 55-75 ft | $3,300-$18,750 | $3,800-$21,500 |
| 75-100 ft | $4,500-$25,000 | $5,200-$28,750 |
Costs a Repair Doesn't Include (But Full Replacement Often Does)
A repair or reline job typically stops at the pipe itself. A full replacement is a bigger project, and it's worth budgeting for these line items up front:
- Tie-in connections: If more than one drain line connects to your main sewer line before it reaches the street, each tie-in adds its own per-foot cost — the same $60-$250/ft range as the main line itself, plus any extra excavation needed to reach it.
- Backflow preventer: Many replacement projects are a good opportunity to add a backflow preventer, which stops sewage from flowing back into your home during a municipal system backup. Expect $150-$1,150 installed.
- Septic-to-sewer conversion: Some older properties in unincorporated parts of Williamson and Davidson Counties are converting from a private septic system to Metro sewer. This adds septic tank decommissioning — commonly up to $5,500 — on top of the new line itself.
- Permits and camera inspection: A full replacement typically requires a Metro Nashville permit (often $800-$1,500 as noted on our Nashville service page) plus a post-installation camera inspection to confirm the work meets code.
Not sure if you need a repair or a full replacement? A free camera inspection tells you exactly what your line needs before you budget for either one. Call (629) 276-6322.
When Does a Sewer Line Need Full Replacement Instead of Repair?
Not every failing sewer line needs to be fully replaced. A sewer camera inspection is what actually determines this, but there are a few situations where full replacement is almost always the outcome:
- The pipe is Orangeburg material — common in Nashville homes built between the 1940s and early 1970s. Orangeburg deforms over time and can't be lined, so pipe bursting or full replacement is the only durable fix.
- The line has collapsed or is severely bellied (sagging), which means a liner has nothing stable to bond to.
- Multiple sections along the line are failing simultaneously rather than one isolated defect — at that point, replacing the whole run is usually more cost-effective than several separate repairs.
- You're upsizing the line's diameter to handle an addition, a new bathroom, or a property with historically inadequate capacity.
If your line is Orangeburg specifically, our Orangeburg pipe replacement page covers the specific process and pricing for that material.
Financing a Full Sewer Line Replacement
Because full replacement is a larger expense than a repair or spot fix, financing is worth asking about upfront rather than after you've already gotten a quote. Many trenchless contractors, including Prodigy, offer financing options that break a $10,000-$25,000 project into manageable monthly payments — worth asking about during your free estimate, especially if the replacement wasn't a planned expense.
Sewer Line Replacement Cost at a Glance
- Line length is the biggest cost driver for a full replacement — a 25-35 ft line and a 75-100 ft line can differ by $20,000 or more.
- Full replacement often includes costs a simple repair doesn't: tie-ins, backflow preventers, and sometimes septic-to-sewer conversion.
- Orangeburg pipe, collapsed lines, and multiple simultaneous failures are the clearest signs you need replacement, not repair.
- Financing is available for larger replacement projects — ask during your free estimate.
- Next step: contact Prodigy Sewer & Drain for a free camera inspection and exact replacement quote.
Frequently Asked Questions
How much does a full sewer line replacement cost in Nashville?
Most full replacements in Nashville run $5,000 to $29,000, with line length being the biggest factor. A short 25-35 foot line typically costs $1,700-$10,000, while a longer 75-100 foot line can run $5,200-$28,750. Your exact number depends on length, depth, pipe material, and access.
What's the difference between a sewer line repair and a full replacement in terms of cost?
A repair (CIPP lining or a sectional spot repair) generally addresses a specific defect and stops there. A full replacement often includes additional costs a repair doesn't — tie-in connections, backflow preventers, permits, and sometimes septic-to-sewer conversion — which is why total replacement project costs tend to run higher than repair costs even at similar pipe lengths.
Do I need a permit for a full sewer line replacement in Nashville?
Yes. Metro Nashville Water Services typically requires a permit for sewer line replacement, generally running $800-$1,500, plus a post-installation inspection to confirm the work meets code. Your contractor should handle this as part of the project.
Can I finance a sewer line replacement?
Yes, financing is commonly available for larger sewer replacement projects, breaking the total cost into monthly payments. Ask about financing options during your free estimate, since terms and availability vary by contractor.
How do I know if I need a repair or a full replacement?
A camera inspection is the only reliable way to know. Signs that typically point toward full replacement include Orangeburg pipe material, a collapsed or severely sagging line, or multiple failure points along the same run rather than one isolated defect.
Get an Exact Replacement Quote
A full sewer line replacement is a bigger investment than a repair, but knowing the real cost drivers — line length, tie-ins, permits — helps you budget accurately instead of guessing. Prodigy Sewer & Drain provides a free camera inspection and an exact, fixed quote before any work begins. Contact us today.