Sewer line problems on your inspection: the credit playbook
The sewer lateral runs from your house to the city main, usually under the front yard. When it fails, the repair costs four to twenty-five thousand dollars depending on length, depth, and what is over the pipe. This is the single largest line item on most inspection reports.
What this finding actually is
The lateral is the private pipe between your home's plumbing stack and the city sewer main. It is the homeowner's responsibility from the house to (in most cities) the property line or the main itself. Failures show up as root intrusion, offset joints, cracks, collapses, and in older homes, clay or Orangeburg pipe past its service life.
Repair options range from spot repair ($1,500 to $5,000) for a single break, trenchless cured-in-place pipe lining ($4,000 to $15,000) for an intact-but-leaking line, to full excavation and replacement ($8,000 to $25,000) when the line is collapsed or runs under hardscape.
Why it is a credit conversation, not a fix-it conversation
The most common seller objection is that the line worked yesterday and the buyer is overreacting. Two facts make that fall apart. First, the inspector's camera footage is documentary evidence; the listing agent cannot argue with the recording. Second, the next buyer's inspector will run the same camera and find the same defect, so the seller will negotiate this either now or with the next buyer.
Cities like Los Angeles, San Diego, and Berkeley require a passed sewer inspection before close of escrow. If your home is in one of these jurisdictions, the negotiation is not optional for the seller, it is mandatory.
How to confirm what your inspector found
A sewer scope is a separate $200 to $400 service most inspectors recommend on any home older than 40 years. The report includes a video file and the inspector's notes on root intrusion, offsets, bellies, and cracks. If your inspection did not include a sewer scope and your home is over 30 years old, order one before the contingency expires.
The bullet to put in your credit-request letter
Paste this into the bullet list in your credit-request letter and replace the bracketed fields with your own. The structure is what makes it work: finding, page citation, cost range with source, requested credit.
Sewer lateral defects documented by sewer-scope camera (report attached). Recommended scope: trenchless CIPP liner OR full excavation depending on depth and length. Cost range $4,000 to $25,000. Three local sewer contractor estimates pending; placeholder credit anchored at $X based on RSMeans 2026 for [trenchless OR excavation, length in linear feet].
How much to actually ask for
Get one contractor estimate before sending the letter. The dollar range varies enough (4x between trenchless and excavation) that the seller will reasonably ask for the basis. Sellers who counter usually counter to the trenchless number even when excavation is required.
Questions buyers ask before they negotiate
Is the seller responsible if the sewer fails after close?
Generally no. Most contracts transfer condition risk at close. The inspection contingency window is when the seller can be held responsible. Once you close, the line is yours.
Should I ask for a credit or a repair?
Credit. Trenchless and excavation contractors book weeks out, and a rushed repair tends to be a partial fix. Take the credit, close on time, hire the right contractor on your schedule.
What if the seller refuses?
This is one of the strongest walk-away cases on inspection. The next buyer will find the same defect with the same camera. Walking is credible, and listing agents know it.