A sewer scope inspection is a specialized evaluation of a home’s sewer lateral—the underground pipe that carries wastewater from the house to the municipal sewer or septic system. Using a high-resolution camera, the line is visually inspected to assess its condition and identify defects such as obstructions, root intrusion, cracks, separations, or deterioration. This service is especially valuable during a real estate transaction, as it can uncover concealed issues that are not visible during a standard home inspection and may result in significant repair costs if left unaddressed.
Sewer Lateral Risks
What are they and what's the cost to repair?
The sewer lateral is a critical but often overlooked component of a home. Because it is buried underground, defects can go undetected until they result in backups, property damage, or costly repairs.
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Older Clay Tile Laterals (Pre-1970s):
Homes built prior to the 1970s commonly have clay tile sewer lines, which are more vulnerable to failure over time. These pipes are prone to cracking, separation at joints, and root intrusion due to their segmented construction and aging materials. Their brittle nature also makes them susceptible to damage from soil movement or surface loads. As deterioration progresses, blockages and leaks become more likely—often requiring excavation and full or partial replacement, which can be expensive.
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PVC Laterals (1970s and Newer):
Newer homes typically have PVC sewer lines, which are more durable and resistant to corrosion and root intrusion. However, issues can still occur—most commonly due to improper installation, such as poor slope or loose connections. PVC lines may also be damaged by heavy equipment, landscaping, or ground movement. While generally lower risk than clay, failures can still lead to significant repairs if not identified early.
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Why This Matters:
Sewer lateral defects are rarely visible during a standard home inspection but can carry substantial financial risk. Repairs often fall to the homeowner and can range from several thousand dollars to $10,000+ depending on the severity and location of the issue.
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Key Takeaway:
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Pre-1970 homes: Higher likelihood of defects due to clay tile construction
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1970s–1980s homes: Moderate risk depending on materials and installation quality
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Post-1980s homes: Lower overall risk, but not defect-free