Choosing a survey level
The valuation mentions damp in one line and your survey explains a leaking gutter. Why should the valuation line not be treated as the diagnosis?
Because one line in a valuation is not a diagnosis, and a mortgage valuation is not a structural survey. MoneyHelper draws that line. The valuation mentions damp. Your survey explains a leaking gutter. The diagnosis, such as it is, is the survey's account of the gutter putting water where it should not. The valuation line is a flag for the lender, written without the explanation your surveyor gave. Treating the flag as the diagnosis flattens a cause into a word. Damp is the symptom the valuer noted. The leaking gutter is the finding the survey set out.
Last reviewed 24 October 2026. Written for buyers in England and Wales unless this answer says otherwise. No named surveyor has signed this page. It is general guidance, not a report on your house, and not legal advice.
What is the fuller explanation?
Valuers are not writing a damp report, and one line has no room for the cause. Your survey, which explains the gutter, is the condition document. Both can refer to the same stain and still not be the same sentence. Promoting the valuation's word loses the cause and pretends the lender's paper investigated moisture. It did not. MoneyHelper is plain that this valuation is not a structural survey.
Use your survey when you speak to the solicitor or the seller about the defect: a leaking gutter, described as the survey describes it. If the lender has a retention or a query based on the valuation line, show them the survey's explanation rather than arguing with the word damp in the abstract. Do not ask the valuer's line to do the survey's work. Do not invent a treatment the survey has not specified. The gutter finding is the one with a mechanism. The valuation line is not that mechanism.
What should you ask your surveyor?
- What does the valuation actually say in its one line about damp?
- What cause does your survey give, and is it the leaking gutter?
- Has the valuation diagnosed that cause, or only flagged damp?
What are the typical next steps?
- Treat the leaking gutter in your survey as the explanation.
- Do not use the valuation's single word as the diagnosis.
- Show the lender the survey if they query the valuation line.
Costs vary with the building and with who you instruct. Where this page does not cite a published figure, ask the surveyor, a relevant specialist, or your solicitor for a written quote. Do not treat a forum average as the price.
Also asked about this
If both documents say damp, do they agree the cause?
Not necessarily. Both can use the word and only the survey explains a leaking gutter. Agreement on a label is not agreement on a diagnosis. MoneyHelper says a mortgage valuation is not a structural survey. The line in it has not become your survey's finding.
Should you ignore the valuation because the survey is fuller?
No. The valuation still matters to the lender. You should not ignore it, and you should not treat its line as the diagnosis. Keep it as the lender's paper. Keep the gutter explanation in the survey. They are related and they are not the same job.