New Build Premium Calculator
Compare a new build price against an equivalent resale property and see how long growth and running cost savings take to close the gap.
Are you a real estate agent or broker? Put this calculator on your own agent page, beside your listings, so the buyer who ran the numbers can message you in one tap. Create free agent page →
New build property typically sells at a premium to equivalent second-hand stock, and part of that premium disappears the moment the property becomes second-hand itself. The rest is paid back through lower running costs, a warranty and no immediate repairs.
How long the recovery takes depends on the size of the premium and how much the running costs actually save, both of which are worth establishing before rather than after.
The calculation
The premium is the difference between the new build price and a genuinely comparable second-hand property. The catch-up period is how long the resale market takes to grow to what you paid, which is log(new ÷ resale) ÷ log(1 + growth). Running cost savings and avoided repairs offset it separately.
Worked example
A 420,000 new build against a 380,000 comparable resale is a 40,000 premium — 10.5%. At 4% growth the resale market reaches 420,000 in about 2.6 years. Meanwhile 900 a year of running cost savings and 4,000 of avoided repairs offset 8,500 over five years, covering roughly a fifth of the premium.
Find a genuine comparable
The whole calculation rests on the resale figure, and estate agent comparisons frequently use larger, older or better-located properties. Compare on price per unit of floor area in the same area, and adjust for condition, before accepting either number.
Put your number on the page that answers the question
Buyers remember whoever gave them the answer. A property page of your own carries this calculator, your listings and a WhatsApp button, so the next question comes to you.
Create your free property pageFrequently asked questions
Why do new builds cost more?
Warranty, no immediate repairs, better efficiency, modern layouts and the convenience of buying without a chain. Part of it is also simply that developers price to what buyers will pay for something nobody has lived in.
Does the premium disappear on resale?
Some of it, typically once the property is a few years old and sells alongside other second-hand stock. How much depends on the market — in areas with little new supply the difference persists longer.
What incentives should I ask for?
Developers frequently offer contributions toward costs, fittings, or paying fees rather than reducing the headline price, which protects their comparables. Those are worth real money and are usually easier to obtain than a discount.
More buying calculators
Price per square foot
The only fair way to compare two properties.
SellingOff-market sale
What a private offer has to beat to be worth taking.
OwningEnergy upgrade payback
How long an efficiency upgrade takes to pay for itself.
BuyingWhat you can afford
From income and deposit to a realistic asking price.
BuyingRent vs buy
The answer depends mostly on how long you stay.
BuyingDeposit savings plan
The deposit you need, and how long it takes to save it.
BuyingClosing costs
Total cash to complete, not just the deposit.
BuyingJoint ownership split
A fair split when the deposits are not equal.
BuyingBuying abroad — true cost
The real cost once the exchange rate margin is counted.
BuyingExtend or move
The cheaper route to the space you need.
BuyingJoint income affordability
What two incomes borrow, after existing commitments.
BuyingBigger deposit, better rate
What crossing an LTV threshold is really worth.