New-build vs resale at £350k: the true cost gap in 2026

The median new-build home sold in England and Wales for £350,000 in 2024 (HM Land Registry, queried 15 August 2026). The median resale sold for £285,000. So £350,000 is roughly what the typical brand-new home costs — and also enough to buy a considerably better-than-average older one.

But the sticker price is only half the question. Once you have paid the same £350,000 either way, which home is cheaper to run each month? The intuitive answer — the shiny, well-insulated new-build — turns out to depend almost entirely on one line the price tag never shows.

At the same price, most of the bill is identical

Buy at £350,000 and the big-ticket costs do not care whether the property was finished in 2024 or 1974. On a 25% deposit you borrow the same £262,500 either way; stamp duty is set by price and buyer status, not build age; and council tax is set by the property's band and local authority, not the year it was built.

Stamp duty is the England and Northern Ireland figure for a £350,000 purchase: a home mover pays £7,500 (an effective rate of 2.14%), while an eligible first-time buyer pays £2,500 — the 5% charge on the slice between the £300,000 first-time-buyer threshold and £350,000 (HMRC, 2026). The mortgage line assumes the Bank of England's latest quoted five-year fix at 75% loan-to-value, 4.32% in the April 2026 release, over 25 years; the payment rises to about £1,584 a month if your rate is one point higher and £1,743 at two points higher. Your own rate depends on your lender, deposit and credit profile. Council tax here uses the £2,410.97 mean Band D across the 296 English authorities for 2026-27 (gov.uk); in Milton Keynes, a town built largely around new estates, Band D is £2,372.21, and the same bill applies whether the home is a 2024 flat or a 1930s semi on the next street.

That leaves exactly two lines where a new-build and a resale genuinely diverge: energy and the service charge.

Line one: energy — the new-build's real, but small, edge

This is where the new-build earns its reputation. A property's energy rating tracks its build era almost mechanically: 92.9% of homes built since 2003 carry an EPC of C or better, against 19.1% of homes built before 1945 (Energy Performance Certificate register, queried 15 August 2026). Successive tightenings of the Building Regulations — insulation, glazing, condensing boilers — mean a 2024 home is usually rated A or B, while the typical older resale sits at D.

What is that worth in cash? On the EPC's own modelled figures for a home of comparable size, an A-rated property is estimated at roughly £43 a year to run and a B at about £80, against about £249 for a D — a gap on the order of £170 to £200 a year, or £15 a month. Two caveats matter. The EPC's running-cost model uses dated assumptions and does not track current Ofgem prices, so real bills routinely run several times the certificate figure; and the gap between ratings is far more reliable than the absolute numbers. A new A/B home does cost meaningfully less to heat than an older D — but as a monthly figure, the advantage is measured in tens of pounds, not hundreds. Our energy cost by EPC rating guide works the full band-by-band ladder.

Line two: the service charge — the line that decides the answer

Here the direction reverses. In England and Wales, new-build flats are almost always leasehold — 99.4% of new-build flats registered between 2022 and 2024 were leasehold — and every leaseholder pays an annual service charge for the upkeep of the building's shared structure and services. Industry figures compiled by the Leasehold Advisory Service put a typical new-build flat service charge in the £1,500 to £4,500 a year range, with £2,000 to £3,000 common for a block with standard amenities — that is £167 to £250 a month, before you add anything else. A freehold resale house carries no service charge at all.

The middle case is the freehold new-build house. Many sit on developer-managed estates and carry an estate rentcharge or management fee for communal roads, lighting and green space — typically a smaller £100 to £300 a year, but not nothing.

Netting it out: the all-in monthly picture at £350,000

Put the identical lines and the two divergent lines together, using a mid-range service charge and the national mean Band D:

Read across the bottom row and the headline flips. A £350,000 leasehold new-build flat runs about £190 a month — roughly £2,300 a year — dearer than a £350,000 freehold resale house, even though the flat is far more energy-efficient. The reason is arithmetic: the service charge is an order of magnitude larger than the energy saving, so it more than cancels it. A freehold new-build house, by contrast, lands within a few pounds a month of the resale — its energy edge is real but is offset by the estate charge, leaving the two close to level.

The lesson is not that one is better than the other. It is that at the same purchase price, the monthly running cost is decided by tenure and the service-charge line, not by the EPC rating that the marketing leads with.

The line items neither table shows

A few costs sit outside the monthly comparison and are worth weighing separately. New-builds have historically shown a first-few-years price adjustment against the wider market as the "new" premium fades — we cover this in how new-builds move against the wider market. Resale houses carry a retrofit liability instead: moving a D-rated home up a band costs money, though it is a one-off rather than a recurring charge. And developer incentives — stamp duty paid, flooring, white goods — are common on new-builds and reduce the effective premium, so it is worth asking what is included.

See the numbers for a specific address

Type a postcode into Homecost's True Cost tool to see every property on a street with its Land Registry sale history, EPC rating and modelled all-in cost — new-build estates and older terraces scored on the same comparable. You can also change the price, deposit, rate and term in the mortgage payment calculator, or read what a new-build flat's service charge typically covers and how the national new-build versus resale price gap breaks down.

Comparing budgets either side of £350,000? See the full year-one stack for the true cost of buying a £300,000 home and the true cost of buying a £400,000 home, or browse more cost intelligence guides.

Figures are drawn from HM Land Registry Price Paid Data (queried 15 August 2026), HMRC stamp duty rates 2026, DESNZ Energy Performance Certificate Open Data, gov.uk council tax levels 2026-27, Bank of England quoted mortgage rates (April 2026 release) and Leasehold Advisory Service service-charge guidance. EPC running-cost figures are modelled, not measured. This is general information, not advice. Speak to a qualified adviser, conveyancer or surveyor before acting.