The New Build Premium and Value Depreciation
New build properties are typically priced at a premium over equivalent second-hand properties in the same area — reflecting the brand new condition, developer marketing costs, the warranty included in the purchase and the consumer preference for new homes. This new build premium is often estimated at between 5% and 15% above comparable second-hand property values, though it varies by location, developer and market conditions. Recent research from Rightmove and Hometrack suggests premiums are lower in some regions following cooling demand in 2023-2025.
The practical consequence for secured lending is that if a new build property is sold within the first few years after purchase, it may achieve a lower price than the original purchase price — particularly if the buyer paid over the odds during a period of strong developer demand. Lenders are aware of this and factor it into their assessment of the maximum loan-to-value they are willing to offer on new builds.
Many lenders apply a reduced maximum LTV for new build properties in the first two years after completion — commonly capping at 75% rather than the 80-85% available on established properties. After two or three years, once the property has an established market value based on comparable resales in the development, lenders often revert to standard LTV limits. If you purchased your new build property some time ago and its value has increased, this restriction may no longer apply.
NHBC Buildmark and Other New Build Warranties
Most new build homes in the UK are sold with a warranty — the most widely known being the NHBC Buildmark warranty, which provides cover for structural defects for 10 years from the date of practical completion. Other widely used warranties include LABC (Local Authority Building Control) Warranty, Premier Guarantee, Advantage HCI and Checkmate. These warranties are a key component of the new build purchase package and are typically required by mortgage lenders as a condition of lending on a new property.
Secured loan lenders will also want to be confident that an appropriate warranty is in place, as it protects the security value of the property in the event of structural defects. In practice, most new builds less than 10 years old will have a warranty in place, and the key detail for lenders is which warranty provider is used and whether the warranty is still active.
For properties that are approaching or have passed the 10-year warranty period, the absence of a warranty is not generally a barrier to secured lending — the property will be assessed on its current condition by the valuer rather than relying on warranty protection. However, evidence of good maintenance and the absence of defects will be important. The NHBC Buildmark 2025 product updates also provide for a two-year defects period with direct developer responsibility, followed by eight years of structural cover.
Developer Incentives and Their Impact on Lending
When purchasing a new build property, developers frequently offer incentives to buyers — these might include cashback, contributions to stamp duty or legal fees, furniture packages, free upgrades, or guaranteed rental income for a period. While attractive to buyers, these incentives can create complications for lenders because they effectively reduce the true cost of the purchase below the headline asking price.
Lenders are required to be told about any incentives received as part of a new build purchase and typically deduct the value of the incentives from the purchase price when calculating LTV, following guidance from UK Finance and CML (now part of UK Finance). For example, if you bought a property for £300,000 with a £15,000 developer cashback incentive, the lender may treat the effective purchase price as £285,000 for LTV calculation purposes. The typical rule is that incentives exceeding 5% of purchase price are fully deducted; below 5%, treatment varies by lender.
On a secured loan application for a new build, lenders will check whether any incentives were received at the time of purchase and may adjust their valuation accordingly, particularly if the original purchase was recent and the property has not yet been independently valued in the resale market. Providing full details of any incentives received — and copies of the purchase documents confirming the original price and any incentive deed — will help the lender and valuer assess the current situation accurately.