Why You Need a Sewer Camera Inspection Before Buying a House
Table of Contents
- What Is a Sewer Camera Inspection?
- What Can Go Wrong With a Sewer Line?
- Why Your Regular Home Inspector Won't Catch It
- What Does a Sewer Scope Actually Show?
- How Much Does a Sewer Camera Inspection Cost?
- What Happens If They Find a Problem?
- Older Homes in Nashville: A Special Note
- How to Schedule One
TLDR
A sewer camera inspection (also called a sewer scope) runs a camera through your home's main sewer line to check for cracks, root intrusion, belly pipes, and blockages. It costs $150–$300, takes about 30–60 minutes, and can save you from a $5,000–$25,000 sewer line repair you'd otherwise inherit from the seller. Every Nashville home buyer should get one — especially in older neighborhoods.
Most home buyers know to get a general inspection before closing. Far fewer think to scope the sewer line. That oversight can be expensive.
A failed sewer line is one of the costliest surprises a new homeowner can face, and unlike a leaky faucet or a cracked window, you won't see it coming. The problem lives underground, out of sight, and a standard home inspection won't find it.
A sewer camera inspection fixes that. For a few hundred dollars and less than an hour of your time, you get a clear look at the condition of the pipe running from the house to the city main — and the information you need to negotiate, walk away, or close with confidence.
What Is a Sewer Camera Inspection?
A sewer camera inspection (sometimes called a sewer scope) involves inserting a small, flexible camera into the home's main sewer line through a clean-out access point. The camera travels the length of the pipe — from the house to the city connection — and transmits a live video feed so the plumber can identify any problems along the way.
The whole process takes 30 to 60 minutes. At the end, you receive a video recording and a written report detailing what was found and what, if anything, needs to be repaired.
It's non-invasive — no digging, no demolition — and it gives you a complete picture of one of the most expensive systems in the home.
What Can Go Wrong With a Sewer Line?
Sewer lines fail for several reasons, most of which have nothing to do with how the previous owners treated the plumbing. Age, soil movement, and tree roots do the damage over time.
Tree root intrusion is the most common issue. Tree roots seek out the moisture inside sewer pipes and work their way through joints and small cracks. Left unchecked, roots fill the pipe and cause recurring backups or a complete blockage.
Belly pipes form when a section of the sewer line sags due to soil settling. Instead of maintaining a consistent downward slope toward the city main, the pipe dips and creates a low spot where waste and water pool. Belly pipes don't always fail immediately, but they will cause problems.
Cracked or collapsed pipe happens in older cast iron or clay tile lines. These materials degrade over decades, and a section that looks functional today can fail with no warning.
Offset joints occur when the ground shifts and two pipe sections slip out of alignment, creating a partial blockage or a gap where tree roots can enter.
Grease and debris buildup is less structural but still worth knowing about. Heavy grease accumulation in the pipe means slow drains and eventual blockages.
Any of these issues can turn a dream home into a sewer repair project.
Why Your Regular Home Inspector Won't Catch It
A standard home inspection covers what's visible: the roof, the HVAC system, electrical panels, windows, and interior plumbing fixtures. The inspector checks that water drains and that there are no obvious signs of sewage backup.
What the inspector can't do is see inside the pipe. The main sewer line is buried underground, and its condition simply isn't visible from inside the home. A house can flush perfectly on inspection day and still have a sewer line one bad storm away from collapse.
Unless your home inspector specifically offers sewer scoping as an add-on service, the underground line goes unchecked.
What Does a Sewer Scope Actually Show?
When the plumber feeds the camera through the line, here's what they're looking for:
- Pipe material — cast iron, clay tile, ABS, PVC. Older materials like cast iron and clay degrade faster and carry more risk.
- Root intrusion — any roots that have entered the pipe at joints or cracks.
- Pipe belly or sag — sections where the grade has shifted and waste pools.
- Cracks, breaks, or collapse — structural failures in the pipe wall.
- Offset joints — misaligned sections that restrict flow or create entry points for roots.
- Buildup — grease, scale, or debris that has accumulated on the pipe walls.
- Connections — condition of the point where the home's line connects to the city sewer main.
The plumber notes the location and severity of any issues and explains what repair or remediation looks like.
How Much Does a Sewer Camera Inspection Cost?
A sewer camera inspection in the Nashville area typically runs $150–$300. Some plumbers include it as a standalone service; others offer it as an add-on during a broader plumbing inspection.
That's a small number relative to what it protects against.
A minor repair — clearing roots or cleaning a buildup — might run $300–$800. A more serious issue, like a belly pipe that needs excavation and replacement, can cost $3,000–$8,000. A full sewer line replacement in a Nashville neighborhood with established trees and older infrastructure regularly runs $8,000–$20,000 or more.
Knowing about the problem before closing gives you three options: ask the seller to fix it, negotiate a credit toward the repair cost, or walk away from the deal entirely. After closing, that leverage disappears — the repair bill is yours.
What Happens If They Find a Problem?
Not every finding means the deal falls apart. Many sewer issues are repairable and can become a negotiating point rather than a deal-breaker.
If the inspection turns up a problem, a good plumber will explain the severity, the repair options, and a realistic cost range. You take that information to your real estate agent and decide how to proceed.
Common outcomes:
- Minor buildup or soft roots: The seller cleans the line before closing, or you negotiate a small credit.
- Belly pipe or offset joints: Depending on severity, you request a repair credit or a price reduction.
- Significant root intrusion or partial collapse: You negotiate a full repair before closing, a substantial credit, or you walk.
- Collapsed or fully failed line: This is a major repair. Most buyers either walk or require the seller to remediate before closing.
The key is having the information. Without a scope, you close blind.
Older Homes in Nashville: A Special Note
Nashville's housing stock includes a large number of homes built in the 1950s, 60s, and 70s — particularly in neighborhoods like East Nashville, Sylvan Park, Green Hills, Bellevue, and parts of North Nashville. These homes are often on the market as renovated flips or charming originals, and many carry the original sewer lines.
Cast iron pipe, which was standard through the mid-20th century, has a life expectancy of 50–75 years. Clay tile lines, common in even older homes, crack and shift as the soil around them moves over decades. If the listing says the home was "fully renovated," that renovation almost certainly didn't include the underground sewer line.
Tree canopy is also dense in older Nashville neighborhoods. Large mature oaks, maples, and sycamores have root systems that extend well past their drip line — and those roots find their way into aging sewer pipes.
If you're buying a home built before 1985 in any Nashville neighborhood, a sewer scope isn't optional. It's essential.
How to Schedule One
Schedule the sewer camera inspection during your inspection period — the same window you use for your general home inspection. This keeps everything within your contingency timeline and gives you time to negotiate if problems turn up.
You can hire a plumber directly to perform the scope, or ask your real estate agent if they have a preferred vendor. Either way, make sure you receive a video recording and a written report, not just a verbal summary.
At 100 Percent Plumbing, we perform sewer camera inspections throughout Nashville and the surrounding area, including Brentwood, Franklin, Nolensville, Hendersonville, Mount Juliet, and beyond. Our licensed Master Plumbers use professional-grade camera equipment and provide a full video and written report so you have documentation for your real estate transaction.
Call us at 615-431-1100 or schedule online to book your pre-purchase sewer inspection before closing day.