Selling a house with a bad sewer line

There is a version of this situation that costs a great deal of money and it is almost always the same version: nobody looked, the buyer’s inspector did, and the negotiation that followed was about a number nobody could put a boundary around.

The mechanism is worth understanding because it is not really about sewers.

Why an unknown defect is expensive

When a buyer learns there is something wrong with a buried line and no one can say what, the number in their head is not an average. It is the worst case, plus a margin for the fact that they are now uncertain about the house generally.

They are not being unreasonable. They have a few days, a report that says the line is compromised, and no way to establish whether that means a short patch or a full replacement. Given that, pricing it as the larger job is the rational move, and their agent will tell them so.

A defect with a known extent behaves completely differently. Material, location, how far along the run, how many defects, which methods are available. That is a scope, and a scope can be quoted, and a quote is a number with a ceiling on it.

Unknown defects are priced as the worst case. Known ones are priced as themselves. Everything below follows from that.

What a pre-list survey actually buys you

A camera survey before the sign goes up gives you four things, and it is worth being clear about which of them is doing the work.

Certainty about the size of the problem. Frequently there is no problem. In the communities built from the 1980s onward the line is usually plastic in long runs, and plastic does not have a wear-out mechanism — a survey there is very often a clean survey. That is a useful thing to own.

Time. This is the one people underestimate. Finding a defect two months before listing means you can get the work quoted properly, take more than one price, and schedule it when the ground and the calendar suit. Finding it during a conditional period means doing all of that in a week, which is when people accept the first number they are given.

The choice of what to do about it. Fix it, or disclose it and price accordingly. Both are legitimate and which is better depends on the defect and on the market. What you cannot do is choose at all if you find out on somebody else’s timeline.

Documentation. Footage, distances, and a written scope. That is what turns “the sewer is apparently bad” into “there is an offset joint at a known distance, here is what it takes, here is the quote”. Those are different conversations.

What it does not buy you

Being straight about the limits.

It does not decide what you are obliged to tell a buyer. Disclosure obligations are a legal question and they are properly answered by your lawyer or your agent — people who can look at your specific situation, your contract and your jurisdiction. A contractor giving you disclosure advice is a contractor working outside their competence, and we are not going to do it. Ask before you commission anything if you want to understand how a result would sit.

It does not make a defect disappear. Once you know, you know. Some sellers would rather not, and that is a real choice with real consequences on both sides of it. It is worth being honest with yourself about which you are before you book.

It does not predict the future. A survey shows a condition on a day. Nobody can tell a buyer how many years a line has left, including us.

If the survey is clean

Then you own something genuinely useful: evidence, before anyone asked for it.

A recent survey in the file removes the buried line as a source of uncertainty in the transaction. It does not have to be argued about, because it has been looked at. In older communities where laterals are commonly clay and buyers have heard the stories, that is worth having.

It is also the single cheapest thing on this list, which is why we suggest it first and why the answer being “nothing is wrong” is the most likely outcome in half this city.

If the survey finds something

Now there is a decision, and it turns on what the footage shows rather than on what it feels like.

One defect with sound pipe either side is a spot repair — a short liner over one place, with the rest of the line left alone. It is typically the smallest job in this trade and often reached through an existing cleanout. Doing it and being able to say it is done is usually straightforward.

Defects at every joint for the length of the run is a full-length answer — lining if the pipe still holds its shape, bursting if it does not. That is a real project and a real number, and it is the case where the fix-or-disclose question is genuinely open.

A blockage in sound plastic pipe is a cleaning, and it is not a defect at all. Anybody quoting a replacement off a blocked plastic line should be asked to point at the frame that justifies it.

Orangeburg closes the question on sight. It cannot be lined, so the conversation is bursting or digging, and there is no third option.

Doing the work before you list

Two honest points, one in each direction.

In favour: a completed repair with footage and a scope attached takes the item off the table entirely. A buyer cannot discount for a risk that has been removed, and work done unhurriedly, by someone you chose, against two or three quotes, is nearly always better work than work done inside a conditional period.

Against: you are spending money on a house you are leaving, and there is no guarantee it comes back in the price. That is a real argument and anyone who waves it away is selling. For some sellers, in some markets, disclosing a known scope with a quote attached is the better move — the buyer can see the ceiling, which is most of what they needed.

What settles it is knowing which job it is. That is the survey, and the survey is the cheap part of all of this.

If you are buying

The mirror image, and shorter.

A general home inspection usually does not include a sewer camera survey. That is not a criticism of inspectors — it is different equipment and a separate scope — but it does mean the buried line is commonly the one significant component of an older house that nobody looks at.

If the house is in an older community, ask what the lateral is. If nobody knows, a survey during the conditional period is the cheapest way to find out, and it is the same survey described above. The most likely outcome is that everything is fine and you paid for peace of mind, which is what an inspection is for.

Know two things before you commission it. A camera cannot see through standing water, so a line that is currently backed up may need clearing before a survey means anything. And the section nearest the street raises the question of who owns what — which is the City’s to answer, not a contractor’s. Ask them about the section in question before anyone quotes work on it.

The short version

The line gets surveyed either way. The only variable is whether it happens on your schedule or on a buyer’s inspector’s.

One of those gives you time, options and a number with a ceiling. The other gives you a week and a deduction sized by somebody else’s imagination.

Book a camera survey · What the footage shows · How long a line lasts