When you think about a home inspection, the roof, foundation, and electrical system often come to mind. But one of the most overlooked — and most expensive to repair — parts of your home is the main sewer line. It’s out of sight, underground, and if it fails, you could be looking at thousands in repairs, not to mention major disruption to your home and daily life.
That’s where a main sewer line inspection comes in. It’s a simple, affordable step that can prevent big, messy, and costly problems down the road.
What Is a Main Sewer Line Inspection?
A main sewer line inspection involves using a specialized camera to visually check the condition of your home’s sewer pipe — the line that carries all wastewater from your sinks, showers, toilets, and appliances out to the city sewer system.
The camera is fed through an access point (called a cleanout) and travels the length of the pipe, sending live video to the inspector. This allows us to spot:
- Cracks or breaks in the pipe
- Tree root intrusion
- Blockages from grease, debris, or foreign objects
- Pipe sagging (known as a belly) that can collect waste and cause backups
- Signs of corrosion in older cast iron pipes
Why It Matters for Chicago Homes
Chicago’s mix of historic and modern homes means sewer lines can vary widely in age and material. Many older properties still have clay or cast iron pipes, which are prone to cracking, corrosion, and root damage. Even newer PVC lines aren’t immune to issues caused by shifting soil or improper installation.
And because our city is no stranger to heavy rain and flooding, any small weakness in a sewer line can quickly turn into a backup — flooding basements with sewage and causing extensive damage.
The Cost of Skipping It
A sewer line repair or replacement in Chicago can range from $3,000 to $20,000+, depending on the location and extent of the damage. And the worst part? Many homeowners don’t discover a problem until after they’ve moved in and experienced their first major backup.
By contrast, a sewer line inspection costs just a fraction of that — typically around $350 when added to a standard home inspection. It’s one of the best returns on investment in the entire buying process.
When You Should Get a Sewer Line Inspection
You should consider a main sewer line inspection if:
- You’re buying an older home (especially pre-1980s construction)
- The property has large trees near the sewer route
- The home has a history of plumbing backups
- You want peace of mind before closing on a sale
How It Fits Into Your Home Inspection
At Chicago Home Inspect LLC, we offer sewer line inspections as an add-on service during your home inspection. This saves time, money, and hassle — you get a complete look at your home’s condition in one visit.
You’ll receive:
- Video footage of the sewer line
- A written report detailing any issues found
- Clear recommendations for repairs or maintenance
Bottom Line
A main sewer line inspection may not be the most glamorous part of buying a home, but it’s one of the most important. Spending a little now can save you from massive headaches and expenses later.