My buyer's survey flagged damp. What should I do?

Getting a survey back with the word damp in it feels like a red light. It usually is not. Damp shows up on a large share of UK home surveys, and most of it is manageable once you know which of the three main types you are actually dealing with.

What kind of damp did the survey actually find?

There are three common types, and they are very different problems. Condensation is moisture from everyday living that cannot escape, caused by poor ventilation. Penetrating damp is water getting in from outside through a defect such as cracked pointing, a blocked gutter or failed render. Rising damp is ground moisture travelling up through the wall where the damp-proof course has failed or is missing.

Which one you have decides everything: the cost, the fix, and whether it matters to a lender at all. A general surveyor often records a high damp meter reading without confirming the cause, so the wording is frequently a recommendation for further investigation rather than a diagnosis.

What should I do first?

1. 1. Read the exact wording

   Find the precise sentence in the survey. Recommend further investigation is very different from confirmed rising damp requiring a new damp-proof course.

2. 2. Get an independent damp survey

   Commission your own specialist damp report, typically £150 to £500, ideally from a surveyor who is not selling the treatment, so the diagnosis is not inflated.

3. 3. Get your own repair quote

   Once you know the cause, get a written quote for the real fix so you are negotiating with a number, not a fear.

4. 4. Do not panic-agree to a reduction

   A buyer asking for thousands off on the strength of a one-line damp note is negotiating, not quoting. Make them show the evidence.

5. 5. Respond in writing with evidence

   Send the buyer your specialist report and quote. A £400 ventilation fix answers a request for a £5,000 price cut on its own.

6. 6. Decide on your terms

   You can fix it before completion, offer a contribution toward the real cost, or hold your price if the finding is minor. The choice is yours to make.

Is damp a reason my sale will fall through?

It is rarely the end of a sale on its own. Surveys wobble a lot of transactions at this stage and most still complete once the finding is understood and priced. What separates a normal bump from a real problem is the type of damp and whether the buyer's lender attaches a condition to the mortgage.

• Normal: a high meter reading, a note to investigate, condensation, or a fixable external defect.
• Normal: a buyer asking a question or requesting a modest, evidenced contribution.
• Red flag: confirmed widespread rising damp with a lender retention, where the bank holds back part of the loan until work is done.
• Red flag: a buyer using a vague note to demand a large, unevidenced reduction and refusing to see your specialist report.

Do I have to fix the damp before I sell?

No. You are not obliged to carry out work. Your realistic options are to fix it and keep your price, to contribute toward the buyer's cost of fixing it, or to hold firm and let a buyer who wants the home proceed with the finding in the open. If the current buyer walks over a minor, well-evidenced issue, the same finding will simply appear on the next buyer's survey too, so a fair, evidenced answer usually serves you better than a large concession.

A one-line note on a meter reading is not a bill. Find the cause, get the real number, then decide.

ValuQ is a UK platform that gives homeowners free, side-by-side valuations from competing local estate agents, so the person guiding you through a survey negotiation is one you chose on merit, on your timeline, with you in control.