Buying a home in Evanston or Skokie means buying an older sewer line. Many homes in both towns were built between the 1910s and 1960s, and the pipe running from the house to the city main is often clay tile, cast iron, or Orangeburg, all of which can crack, sag, separate, or fill with tree roots. A standard home inspection usually doesn’t look inside that pipe. A sewer scope does, and it’s one of the best few-hundred-dollar investments a buyer can make.
This guide explains what a sewer scope is, what it can find, what repairs typically cost, and how buyers use the results during attorney review.
What Is a Sewer Scope Inspection?
A sewer scope is a video camera inspection of the main building sewer, the line that carries all waste from your home to the municipal sewer. A technician feeds a waterproof camera on a flexible cable through a cleanout (usually in the basement floor or at a floor drain area) and records the pipe’s interior. A locator can mark where problems are and how deep.
You get a video and a written summary describing pipe material, condition, and any defects with approximate distance from the access point.
Why It Matters in Evanston and Skokie
- Mature parkway trees. Beautiful elms, maples, and oaks, but their roots find the joints of clay pipe.
- Older pipe materials. Vitrified clay with mortared joints, cast iron that corrodes from the inside, and occasional Orangeburg (tar paper pipe) from the post-war era.
- Combined sewers and basement backups. Heavy storms can push water back up into basements. The condition of the house line, plus whether there’s an overhead sewer or backwater valve, matters.
- Owner responsibility. In most Chicagoland communities, the homeowner is responsible for the private sewer line, often all the way to the connection at the main. Rules vary by village, so confirm with the municipality.
What a Sewer Scope Can Find
| Defect | What It Means | Typical Fix |
|---|---|---|
| Root intrusion | Roots entering through joints or cracks | Root cutting / hydro-jetting; lining or replacement if severe |
| Offset or separated joints | Pipe sections shifted; catches debris | Spot repair or lining |
| Belly (sag) | Low section holding water and waste | Excavation and re-grade of that section |
| Cracks / fractures | Structural damage, possible leak into soil | Spot repair, lining, or replacement |
| Collapsed pipe | Blockage imminent or present | Replacement |
| Heavy scale in cast iron | Corrosion narrowing the pipe | Descaling, lining, or replacement |
| Orangeburg pipe | Deforms and fails with age | Replacement |
What Repairs Cost in 2026
| Service | Typical Range |
|---|---|
| Sewer scope inspection | $250–$450 |
| Root cutting / rodding | $250–$600 |
| Hydro-jetting | $450–$1,000 |
| Spot repair (single excavation) | $3,000–$7,500 |
| Cured-in-place lining (per line) | $6,000–$15,000 |
| Full sewer replacement to main | $10,000–$30,000+ |
Costs depend on depth, length, whether the line runs under a driveway or parkway, and village permit/restoration requirements. Work in the public parkway or street adds cost. For a deeper comparison of repair methods, see our drain and sewer services.
How Buyers Use Sewer Scope Results
In Illinois, most residential contracts include an inspection and attorney review period. A sewer scope should be scheduled inside that window, ideally alongside the general home inspection.
- Clean result: Peace of mind. Keep the video for your records.
- Minor roots or scale: Usually a maintenance item. Budget for periodic rodding or jetting.
- Significant defects: Get a written repair estimate from a licensed plumber. Your attorney can use it to negotiate a credit, price reduction, or seller repair.
A credit is often cleaner than a seller-managed repair, because you control the contractor and the quality of the work.
Tips for a useful sewer scope
- Ask for the video. A report without video is hard to evaluate or share with your attorney.
- Run water first. Running water during the inspection helps reveal bellies and flow problems.
- Know the access point. If there’s no accessible cleanout, the inspection may require pulling a toilet, which some sellers restrict. Ask early.
- Check the whole run. Make sure the camera reaches the city main, not just the first 30 feet.
- Be careful with “recently cleaned” lines. Fresh rodding can hide a root problem for a few months.
Basement Flood Protection to Ask About
While you’re investigating the sewer, ask about flood protection. Many Evanston and Skokie homes have had overhead sewers or backwater valves installed, and some villages have offered cost-share programs over the years. If the house has neither, it’s worth pricing as part of your plan. A plumber can also check the sump pump and floor drains. See our plumbing installation and repair services.
Financing Repairs After Closing
If your scope turns up a repair you’ll handle after closing, MMDS offers financing through Sunbit and PowerPay, which helps new homeowners avoid draining the cash they just set aside for moving and furnishing.
Lining vs. Replacement: Which Repair Makes Sense?
If a scope shows problems, buyers often hear two very different quotes: one for cured-in-place lining and one for excavation and replacement. Both can be the right answer.
Lining inserts a resin-saturated sleeve into the existing pipe and cures it into a new pipe-within-a-pipe. It avoids digging up landscaping, driveways, and parkways, and it works well for cracked clay, root-prone joints, and corroded cast iron as long as the pipe still holds its shape and slope.
Replacement is the better choice when the line has a significant belly, a collapse, Orangeburg pipe that has deformed, or when the pipe is too small or poorly graded. Lining a sagging pipe just gives you a new sagging pipe.
A good plumber will show you the exact spots on the video that drive their recommendation. If a contractor recommends full replacement without explaining why lining won’t work, or vice versa, it’s reasonable to ask for a second opinion. Keep in mind that work in the public parkway usually requires a village permit and restoration of sidewalks or parkway turf, which should be included in any quote you use for negotiation.
What to Budget Even With a Clean Scope
An older clay line with a clean scope today can still grow roots in a few years. Many Evanston and Skokie homeowners with large parkway trees budget for rodding or jetting every one to three years as preventive maintenance. It costs far less than cleaning up a basement backup.
Frequently Asked Questions
Is a sewer scope part of a standard home inspection?
Usually not. Most general inspectors run water and look at visible drains but don’t camera the main sewer line. It’s typically a separate service.
How long does a sewer scope take?
Typically 45 minutes to an hour and a half, depending on access and line length.
Should I scope a newer home?
It’s still worth considering, especially if there are large trees nearby. Construction debris and bellies can exist in newer lines too.
Can the seller refuse a sewer scope?
Sellers can set conditions on access. Discuss it with your agent and attorney early in the inspection period.
Who pays for the sewer scope?
The buyer usually pays, just like a general home inspection.
Schedule a Sewer Scope
MMDS provides sewer camera inspections, rodding, jetting, and repairs for homebuyers and homeowners in Evanston, Skokie, and the North Shore. Call (847) 221-6280 or contact us online to book within your inspection window.