Short Answer
A sewer scope is a video inspection of the main sewer line from the house to the street or septic tank. A camera is inserted into the sewer line to check for cracks, blockages, tree root intrusion, bellied pipes, and other issues. A sewer scope costs $200 to $500 and is strongly recommended for older homes, homes with large trees on the property, or homes with cast iron or clay sewer pipes. Sewer line repairs can cost $3,000 to $15,000 or more.
The main sewer line is one of the most expensive systems to repair, and it is not covered by most homeowners insurance policies. A sewer scope inspection involves inserting a waterproof camera into the sewer line through a cleanout access point. The inspector runs the camera the full length of the line to the connection to the public sewer or septic tank. The camera records the condition of the pipe, identifying cracks, breaks, blockages, tree root intrusion, pipe belly (sagging), and pipe collapse. The inspector can also identify the pipe material. Cast iron, clay, and Orangeburg pipes are more prone to failure than modern PVC pipes. Tree roots are the most common cause of sewer line damage. Older homes with mature trees are at higher risk. If the sewer scope reveals significant issues, you can negotiate with the seller for repairs or a credit. Sewer line replacement costs $3,000 to $15,000 or more depending on the length, depth, and accessibility of the line. Trenchless repair methods can reduce the cost and disruption.
Bob's Advice
Redfin Senior Agent · AI Certified Agent
A sewer scope is one of the best investments you can make in the home inspection process. I have seen sewer scopes reveal cracked pipes, massive root intrusions, and even collapsed sections that would have cost thousands to repair. The seller is often willing to pay for these repairs, but only if you identify them before closing. For a few hundred dollars, a sewer scope gives you peace of mind and the ability to negotiate. I recommend a sewer scope for any home built before 1990 or any home with mature trees near the sewer line.
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