The new-build premium: what you pay, and what the resale data says happens next

A new home costs more per square metre than the second-hand one next door. Some of that premium buys real things: a warranty, current building regulations, no chain, an EPC rating that halves the heating bill. Some of it buys the show-home smell, and the show-home smell does not survive to resale. The sold-price record lets you see the premium district by district, and it is larger than most buyers assume.

How big is the new-build premium in the data?

Measured as the gap between the median new-build £/m² and the median resale £/m² in the same district over the same 12 months to August 2026: SW11, Battersea has too few matched new-build sales in this window to publish a premium; E16, Canning Town shows 49%; M4, central Manchester has too few matched new-build sales in this window to publish one; and E14, the Isle of Dogs, where new stock has been the norm for two decades, 37%. Where new stock is the rule rather than the exception, there is less scarcity in it to charge for. Districts with too few new-build sales to publish a premium simply do not show one; a number computed from four sales would be noise.

Why do the headline figures exclude new-builds?

Every headline median on this site is computed over resales, with new-builds counted, listed, and shown as their own figure. This is deliberate. Blending a premium that runs from −10% to 86%, and has a median of 14% across the 64 districts that publish one, into a district median at whatever rate developers happened to complete this year would make the district look dearer for everyone, including the buyer of a 1930s semi to whom the premium simply does not apply. The new-build line on each district page tells you the premium exists and its size; the headline tells you what the standing stock trades at.

Which part of the premium fades?

The premium has two components, and they age differently. The durable part, better insulation, newer wiring, a warranty tail, compliance with current regulations, keeps some value. The first-owner part, the developer’s marketing, incentives priced in rather than discounted, the pure newness, exists only once. At first resale the home competes as the second-hand stock it now is, against homes whose owners did not pay the premium. The practical consequence: a new-build bought at a 45% premium in a district growing at 2% a year in cash terms can take years of ordinary growth just to resell flat. That is not an argument against buying new. It is an argument against paying for newness twice, once in the premium and once in the expectation of resale growth.

What does it look like from the seller's side?

If you are selling a home built in the last decade, the premium works against you exactly once: your buyer is comparing you against resales, because that is what you now are. Pricing off what you paid, premium included, is how recent new-builds sit unsold. Pricing off the district’s current resale £/m², then arguing for the durable part of the premium (the EPC rating, the warranty years left), is how they move.

The new-build figure, where published, sits on each district’s page alongside the tenure split, which matters here too, since most new stock is leasehold. Figures: HM Land Registry sold prices matched to EPC floor areas, 12 months to August 2026, method documented in full.