Surveys & Condition
The three different numbers all called a valuation
A lender valuation, a market appraisal and a formal surveyor valuation answer different questions and rarely agree.
Everything below about property valuations comes from what actually happens rather than from what is supposed to.
What holds up in practice
- A mortgage valuation is a risk check for the lender, not an opinion for you.
- An agent appraisal is a marketing estimate with an incentive attached.
- A formal valuation is a professional opinion with a defined basis and a duty of care.
The lender valuation
Its purpose is to confirm that the property provides adequate security for the loan being advanced. It is often brief, sometimes carried out remotely using transaction data, and it carries no obligation to tell the buyer about condition.
A down valuation means the lender will advance against the lower figure, leaving the buyer to fund the difference or renegotiate. The report is commissioned by the lender and, in many cases, the buyer never sees more than a figure.
The agent appraisal
An agent gives an opinion of what the property will achieve on the open market, based on local knowledge and comparable listings. It costs nothing because it is a bid for the instruction, which creates a well-known incentive to be optimistic.
For most people, three appraisals, with the outlier discarded and evidence requested for each, produces a much more useful number than one. Ask which comparable properties actually sold, at what price and how long they took, rather than what they were listed at.
The formal valuation
A qualified valuer produces a written opinion on a defined basis — market value, reinstatement cost, probate value, matrimonial or tax purposes — and charges a fee. The basis matters enormously, since reinstatement cost for insurance and market value for sale are different numbers describing the same building. It carries professional duties and can be relied upon in ways an agent appraisal cannot.
It is the appropriate instrument for probate, divorce, company transfers and disputes rather than for choosing an asking price.
Why they disagree
Each answers a different question: is this loan safe, what will this sell for, and what is this worth on a defined basis on a defined date. Lender valuations are conservative because the downside falls on the lender, and market appraisals are optimistic because the downside falls on the seller. Different comparable evidence, different assumptions about condition and different dates all move the figure.
Two valuations of the same property a few months apart can differ without either being wrong.
What to do about a down valuation
Ask what comparable evidence was used, since valuers sometimes lack recent local transactions or have missed an improvement. Lenders have appeal processes that generally require new comparable evidence rather than an argument. The alternatives are renegotiating the price, increasing the deposit, or applying to a different lender who may use a different valuer.
In practice, on a new build, a down valuation may reflect the premium being paid rather than an error.
If that does not fit your week, it is not a failure of willpower.
None of these is a survey
A valuation of any kind tells you about worth, not condition, and none of them is a substitute for an inspection. Buyers routinely conflate the mortgage valuation with a survey and discover the difference after completion.
Commission the survey in your own name so the surveyor owes you a duty of care. This is general information; a chartered or otherwise qualified surveyor should assess any specific property.
The takeaway
Ask which question the number was answering before you treat it as the value.
Pick the one that costs you least, and let the rest wait.
Questions readers ask
Can I challenge a mortgage valuation?
Most lenders allow an appeal supported by evidence of comparable sales. Opinion alone almost never succeeds; recent transactions of genuinely similar properties sometimes do.
Why is my insurance rebuild figure so different from the market value?
They measure different things. Rebuild cost is the cost of reconstruction, which excludes the land, and can be higher or lower than market value depending on location.
