A down valuation occurs when your lender's surveyor assesses the property at a lower figure than your accepted offer. Because lenders only advance a percentage of their valuation (your loan-to-value or LTV), not the purchase price, this can create an unexpected cash shortfall. For example: you offer £250,000 with a 10% deposit (£25,000), expecting to borrow £225,000. If the lender values it at £235,000, the maximum loan at 90% LTV is £211,500 — leaving you £13,500 short.
Why Surveyors Take a Cautious View
Surveyors work for the lender, not the buyer, and their priority is to protect the mortgage security. They rely on comparable sales evidence from similar properties that have actually sold in the local area over the past 3–6 months. Common reasons they reduce a figure include:
In volatile or falling markets, surveyors often build in a buffer, making down valuations more frequent.
Immediate Options When the Gap Appears
How to Challenge Effectively
When Walking Away is Sensible
Prevention Strategies
Real-World Example
A buyer in Bristol offered £420,000 for a 3-bed terraced house. Surveyor valued at £385,000. The broker provided 9 recent comps (average £410,000) and demonstrated the seller had overpriced by 10% due to elevated local demand. Seller agreed to £405,000, bridging £20,000 shortfall with personal savings.