A collapsed drain is one of those problems that stays hidden until it doesn’t. Slow-draining sinks, gurgling toilets, a persistent smell in the garden, a damp patch on an internal wall or a sudden dip in the driveway are the usual first signs, and by the time a CCTV survey confirms the pipe has fractured or caved in, you may be weeks from a planned sale. The short answer to the question in the title is yes, you can sell. The longer answer depends on who’s responsible for the drain, what the repair costs, whether your insurance will cover it, and how much time you have. We’ll take each of those in turn.
Whose Drain Is It?
Before you spend anything, establish who owns the pipe that’s collapsed.
- Shared drains and sections beyond your boundary have, since 2011, been the responsibility of the local water and sewerage company. Report the collapse to them and they’ll repair it at their cost.
- Private drains serving only your property, within your boundary, remain yours to arrange and pay for.
A drainage engineer’s CCTV survey will show where the collapse is, and the water company can confirm which parts of the system they’ve adopted. Getting this right first can save you the entire repair bill.
What A Collapsed Drain Costs To Fix
Repair costs vary with the depth of the pipe, its location and the method used.
- CCTV drain survey to locate and assess the problem: typically between £150 and £400
- Patch lining, where a resin sleeve is inserted to repair a localised fracture: often a few hundred pounds to around £1,500
- Full relining of a longer run: from £2,000 upwards depending on length
- Excavation and replacement, needed for a true collapse where lining isn’t possible: commonly between £2,000 and £6,000, and more where the pipe is deep, under a building or beneath hard landscaping
Add to that any making good of driveways, patios or internal floors, and it’s easy to see why a collapsed drain can become a five-figure job in the wrong location.
Will Your Buildings Insurance Pay?
What To Look For In The Policy
Many buildings insurance policies include accidental damage to underground pipes and cables, and some cover the cost of locating and repairing a collapse. Check your policy wording for “underground services” and any exclusions for wear and tear, tree root damage or pre-existing conditions. If the collapse has caused subsidence or damage to the building, that may be covered separately under the subsidence section.
What Happens If You Claim
The insurer will usually arrange the repair through their own contractors, and you’ll pay the excess. The claim will appear on your claims history and will need disclosing to a buyer, but a repaired drain with a paid claim and a completion certificate is far better than an open problem.
How A Collapsed Drain Affects A Sale
On the open market, a known drain problem tends to surface in one of three places:
- Your own disclosure on the property information form
- The buyer’s survey noting drainage concerns
- A drainage survey the buyer’s solicitor recommends
Once it’s known, the lender is likely to require either the repair before completion or a retention covering the estimated cost. Undisclosed, it’s a misrepresentation risk: buyers who discover a collapsed drain after completion, and can show the seller knew, have a claim.
The practical effect is that a mortgage buyer will either walk away, demand the repair, or seek a reduction that reflects the work plus a margin for the uncertainty. Any of those adds weeks.
Your Options As A Seller
- Repair and sell. If the drain is yours, the repair is affordable and you have the time, fixing it removes the issue entirely. Keep the survey, the invoice and any guarantee for the buyer.
- Claim and sell. If your insurance covers it, claiming is often the cheapest route, though insurer timescales can be slow.
- Disclose and price accordingly. If you’d prefer not to repair, get quotes and reduce the asking price by the cost of the work. Provide the CCTV survey and quotes to buyers upfront.
- Sell as it stands to a cash buyer. If you’re trying to sell your house quickly and a collapsed drain is the thing standing in the way, we’ll buy the property with the drain as it is. We make an offer within 24 hours, cover the survey, legal fees and EPC, and complete on a date you choose. Our offers fall between 70% and 85% of market value, with the drain repair accounted for, and we buy throughout England and Wales.
Which Option Makes Financial Sense?
The calculation is simple to set out and worth doing properly.
On One Side Of The Ledger
Put the repair cost, the time it takes, and the holding costs of the property while you wait, plus the agent’s commission and the risk of a mortgage sale collapsing.
On The Other
Put the difference between a cash offer and open market value.
For a drain that costs £800 to patch, repairing and selling normally wins. For a collapse under an extension that’ll cost £8,000 plus a new kitchen floor, and where you need to move within a couple of months, a cash sale often produces a better net result with far less stress. Working with Property Buyers Today, you’ll get a figure quickly enough to make that comparison before committing to anything.
FAQs
Can I sell my house with a collapsed drain?
Yes. You’ll need to disclose it honestly, and mortgage buyers may require repair or a retention, but cash buyers and auction buyers will purchase with the drain as it is.
Who is responsible for a collapsed drain?
Drains serving only your property and within your boundary are yours. Shared drains and sections beyond your boundary are generally the water company’s responsibility since the 2011 transfer of private sewers.
Does home insurance cover a collapsed drain?
Often, under accidental damage to underground services, though wear and tear and tree root exclusions are common. Check your policy wording and speak to your insurer before arranging your own repair.
How much does it cost to repair a collapsed drain?
From a few hundred pounds for a patch repair to several thousand for excavation and replacement, depending on depth, access and what sits above the pipe.
Do I have to tell the buyer about a collapsed drain?
Yes. The property information form asks about known defects, and failing to disclose a drain problem you’re aware of can lead to a misrepresentation claim after the sale.
Will a cash buyer reduce the offer for a collapsed drain?
The offer accounts for the repair cost from the outset. A CCTV survey and a quote let us price it accurately, so there’s no adjustment later.