Yes, a previous water leak normally has to be disclosed. The TA6 property information form asks about flooding, insurance claims and known defects, and answering it dishonestly can lead to a claim for misrepresentation after completion. A leak that was properly located, repaired and dried, with paperwork, rarely troubles a buyer. One that was hidden usually does.
Two winters ago a pipe under the bathroom went and the kitchen ceiling came down. It was found, fixed, dried and redecorated, the insurer paid, and you have not thought about it since. Now the house is going on the market and the solicitor has sent over a form with a question about water damage and insurance claims. Do you have to mention it? Will it put buyers off? What if the surveyor finds something?
The answer to the first question is almost always yes. The answer to the second is that it depends entirely on how well you can show it was dealt with. This guide covers what you have to declare, what a buyer’s surveyor will look for, and the paperwork that turns a past leak from a worry into a footnote.
What the property information form asks
In England and Wales the seller completes the TA6 property information form as part of the conveyancing pack. Among many other things, it asks whether the property has been affected by flooding, whether there have been any insurance claims, and whether the seller knows of any defects or disputes. The wording changes from time to time and your solicitor will have the current version, but the substance stays the same: has anything happened to this house that a buyer would want to know about?
A water leak that led to an insurance claim is squarely within that. A leak you repaired yourself without claiming is a greyer area, but if it caused damage, needed drying, or left any lasting effect, the safe course is to declare it. The form also asks about building work and alterations, so if floors or ceilings were replaced as part of the reinstatement, that belongs in the answer too.
Answers on the form are relied on by the buyer. If you state that there have been no claims and no defects, and the buyer later discovers a claim on the insurance database or a surveyor finds concealed damage, they can pursue you for misrepresentation. That can mean paying for repairs, or in serious cases the sale being unwound. It is not worth it, particularly when a well-handled leak is such an easy thing to explain.
Why honesty usually costs you nothing
Buyers are not frightened of a leak that happened. They are frightened of a leak that might still be happening, or that was patched over without anyone finding the cause. The difference between the two is documentation.
A one-line answer that says “Escape of water from a bathroom pipe in January 2024, source located by a leak detection survey, pipe repaired, area dried and reinstated under an insurance claim, paperwork available” reads as a house that has been looked after. The same event described as “some water damage, sorted now” invites every question you were hoping to avoid.
The paperwork to have ready
Gather these before the house goes on the market, not when the buyer’s solicitor raises an enquiry.
- The leak detection report. This shows the source was found, not guessed, and where it was. If the leak was traced by a specialist, the report will include the method, photographs and often thermal images. Our guide to what a leak detection survey involves explains what a good one contains.
- The plumber’s invoice for the repair. What was replaced, and when.
- The drying certificate or final moisture readings from the damage management company. This is the document buyers’ surveyors value most, because it proves the structure was dry before it was covered up.
- The insurer’s settlement letter or claim reference. Confirms the claim was accepted and closed.
- Invoices for reinstatement: flooring, plastering, decoration, kitchen units.
- Any guarantees on new flooring or plumbing work.
If the leak was handled without a claim and you have little of this, it is worth commissioning a fresh survey of the affected area now. A current thermal and moisture survey showing the area is dry, with no active leak, answers the buyer’s real question directly. Our trace and access service produces exactly that kind of report.
What a buyer’s surveyor will find
Assume the evidence will be seen. A RICS surveyor carrying out a homebuyer report or building survey will take moisture readings on ground floor walls and around bathrooms and kitchens as a matter of routine, and will note anything that looks recent or inconsistent. Things that catch their eye:
- A patch of newer plaster or paint on an otherwise older ceiling or wall.
- A replaced section of flooring that does not quite match the rest, or new kitchen plinths against old units.
- Elevated moisture readings in one area, even if the surface looks fine.
- A faint tide mark showing through emulsion, or staining on the underside of floorboards visible from a hatch.
- A musty smell in one room or cupboard.
- A boiler pressure gauge sitting low, or a filling loop that looks well used.
Any of these without an explanation goes into the report as a defect for further investigation, and the buyer’s solicitor raises an enquiry, and the buyer starts wondering what else has been covered up. The same finding with the paperwork already in the pack is noted and moved past. It is the surprise that costs money, not the leak.
What if the readings are still high?
Sometimes a surveyor finds moisture in an area you thought was long finished. There are three possibilities, and it is worth knowing which before you respond.
| Finding | Likely reason | What to do |
|---|---|---|
| High reading in the old leak area, no other sign | Residual moisture in screed or thick walls, common in older Cornish houses | Provide the drying certificate, offer a current survey |
| High reading and a fresh stain or smell | The repair has failed or a second leak has started | Have it traced now, before exchange |
| High readings along the base of an outside wall | Rising damp or ground moisture, unrelated to the old leak | Explain the difference, consider a damp survey |
| High reading only on salt-contaminated plaster | Old salts from the original wetting reading falsely high | A specialist survey can show the material itself is dry |
The second row is the one to act on quickly. A sale is far easier to hold together with a report that says “a new leak was identified at this joint and has been repaired” than with a shrug. If the source is in doubt, our article on the overnight water meter test is a quick way to rule a supply pipe in or out before you call anyone.
Insurance and the next owner
Buyers will ask whether the house is still insurable at a normal premium. A single escape of water claim, closed and documented, is not unusual and most insurers will quote without difficulty. Two or more claims in a few years, or an open claim, is a different conversation. If you have had more than one, be upfront about it and about what was done to stop it recurring: a replaced pipe run, a new stopcock, a leak detection device on the main. The buyer’s insurer may ask the same questions yours did, and how the claim was categorised matters. Our guide on claiming on home insurance for a water leak explains the process from the other end.
A note on Cornish houses
Old granite and cob buildings around Bodmin, Liskeard and the moor villages nearly all have some history of water. Slate floors on earth, no damp course, lime plaster that holds moisture, supply pipes that run a long way from the lane. Surveyors who work here know this and are not alarmed by a past leak in a two-hundred-year-old cottage. What they want to see is that the source was identified properly, rather than assumed to be “just an old house”. A report that separates a repaired pipe leak from the ordinary background damp of an old building is worth having in the pack from the start.
Frequently asked questions
Do I have to tell buyers about a water leak that was fixed?
If it caused damage, led to an insurance claim or needed repair work, yes. The TA6 property information form asks about flooding, claims and known defects, and buyers rely on the answers. A repaired and documented leak rarely affects a sale. A concealed one can lead to a misrepresentation claim after completion.
Will a previous leak reduce the value of my house?
Not usually, if it was properly located, repaired and dried and you can show the paperwork. Value is affected when a surveyor finds unexplained moisture or evidence of a cover-up, because the buyer then prices in uncertainty. Good documentation removes the uncertainty.
Can buyers find out about my insurance claim?
Yes. Insurers share claims information on an industry database, and the buyer’s insurer will see a claim at the address when they quote. It is far better for the buyer to hear about it from you, with an explanation, than from their insurer.
What if I repaired the leak myself and never claimed?
Declare it if it caused damage or needed drying. If you have no paperwork, a current survey showing the area is dry with no active leak is the best substitute, and is worth arranging before the house goes on the market rather than after a surveyor raises it.
The buyer’s surveyor found damp where the leak was. Is the sale lost?
Rarely. It is often residual moisture in a screed or thick wall, or salts left from the original wetting. Provide the drying certificate and offer an up-to-date survey. If there is a fresh stain or smell, have it traced immediately so you can show the buyer it was found and fixed.
Get the leak signed off before you sell
If you are missing the paperwork, or a surveyor has raised a damp reading where the old leak was, we can survey the area and give you a clear written report that the area is dry and there is no active leak. We provide leak detection across Cornwall.
