Mortgage question
What's the difference between a mortgage valuation and a survey?
A mortgage valuation is a lender-commissioned check — often free desktop or drive-by in 2026 — that confirms the property is worth the loan amount. It protects the lender, not you. A survey is a separate buyer-commissioned report on the property’s physical condition and costs £400–£1,500. They serve entirely different purposes.
What does a mortgage valuation actually check?
A mortgage valuation answers one question: is this property worth enough to secure the mortgage we’re lending? The lender’s valuer checks comparable recent sales in the postcode, confirms the property exists and matches the application description, and flags anything that would make the property unsaleable — serious structural issues, Japanese knotweed, cladding problems, legal title issues. The report is a short document that goes to the lender’s underwriters, not to you (though you can usually request a copy).
In April 2026 most mainstream high-street lenders — Halifax, Nationwide, Santander — use an Automated Valuation Model (AVM) on sub-75% LTV mainstream properties. The AVM produces an instant valuation from sold-price data, and no surveyor visits the property. For higher LTVs or unusual properties, a physical drive-by or internal inspection is still ordered.
How is a survey different?
A survey is commissioned by the buyer and inspects the property’s physical condition in detail. You pay for it, you own the report, and it’s written for your purposes rather than the lender’s. The three RICS levels are:
| Report | 2026 cost | What it tells you |
|---|---|---|
| Mortgage valuation | Free–£350 (often free) | Is it worth the loan? |
| Level 2 HomeBuyer | £400–£700 | Condition summary + key defects |
| Level 3 Building Survey | £700–£1,500+ | Full structural inspection + repair costs |
See which house survey do I need for the full picture on choosing between them.
How does a down-valuation work?
A down-valuation is when the lender’s valuer puts the property below the agreed purchase price. Say you’ve offered £300,000 and the valuer returns £285,000. The lender will lend against the lower figure, so your 90% LTV mortgage falls from £270,000 to £256,500 — and you’d need to find the £13,500 shortfall, renegotiate the purchase price, or walk away. Down-valuations have been more common in 2025–26 as lenders grew cautious after the 2023–24 price corrections.
The down-valuation is a legitimate basis for reopening price negotiation with the seller — see can I renegotiate the price after a bad survey.
Is the lender’s valuation enough protection?
The lender’s valuation is not enough protection for you. It doesn’t cover:
- Roof condition, damp, rot or woodworm beyond the headline
- Electrical and plumbing systems
- Subsidence or structural movement (unless obvious from outside)
- Condition of windows, drains, outbuildings
- Future maintenance costs and repair priorities
- Whether extensions have building control sign-off
Skipping your own survey to save £500 on a £300,000 purchase is a false economy when typical hidden defect costs run into four or five figures. See mortgage valuation guide for the full treatment.
Common misconception: “The valuation must have been thorough — the valuer was there for an hour”
Even a physical mortgage valuation is a surface-level visit of 15–30 minutes focused on saleability, not condition. The valuer isn’t looking behind panels, lifting floorboards, checking joist sizing or testing damp-proofing. Much of the report is based on comparable sales data rather than what they saw inside the house. If you want an actual condition assessment, commission your own survey. Information, not regulated advice.
Sources
Information, not regulated advice. Mortgage Notes is not an FCA-authorised mortgage adviser. For a recommendation on your specific circumstances, speak to an FCA-authorised broker.