UK House Price Growth Halves to 0.8 Percent as September Prices Fall

UK house prices fell 0.2 percent in September and annual growth halved to 0.8 percent from 1.6 percent in August, the weakest reading on the measure since December 2025. The Nationwide House Price Index, published on 1 October, put the average UK price at £274,251, down from £275,465 a month earlier.

What it means for a foreign buyer

If you are negotiating a UK purchase this month, the index has moved toward you. The average price on it is £1,214 lower in cash terms than it was in August, and both figures came in below what the market expected: forecasters looked for no monthly change and 1.3 percent annual growth, and got minus 0.2 percent and 0.8 percent. That gap matters more than the level. A market that undershoots its own forecasts is one where asking prices set three months ago are now stale, and a vendor who priced off the spring is the party under pressure to move, not you.

Then check which segment you are actually buying. Flat prices were broadly unchanged year on year while terraced houses rose 1.8 percent, and non-resident buyers are concentrated in flats, particularly in London. The part of the market most overseas owners hold is the part that is not appreciating. The regional spread says the same thing more bluntly: Northern Ireland ran at 5.9 percent annual growth in the third quarter while East Anglia fell 0.7 percent, a spread of 6.6 points inside one national number. If you are holding a UK flat and planning to list it, this is not the month the index is doing the work for you.

Price the property in front of you, not the headline.

What changed

Nationwide recorded a 0.2 percent fall in prices in September on a seasonally adjusted basis, against a 0.2 percent rise in August. Annual growth came in at 0.8 percent, half the 1.6 percent recorded in August and the slowest rate since December 2025. Consensus expectations had been for a flat month and 1.3 percent annual growth, so the release missed on both measures.

The average price on the index fell to £274,251 from £275,465. On the quarterly regional breakdown covering the third quarter, Northern Ireland was the strongest region at 5.9 percent annual growth and East Anglia the weakest at a 0.7 percent annual decline. By property type, terraced homes led at 1.8 percent annual growth while flats were essentially flat year on year.

The mechanism

The index is Nationwide Building Society's own measure, built from its mortgage approvals at the point an offer is made rather than from completed transactions. That makes it an early read on the market, running ahead of completion based measures such as the HM Land Registry price index, and it is why a turn shows up here before it shows up in registry data. The monthly figure is seasonally adjusted; the regional figures are published quarterly rather than monthly, so the Northern Ireland and East Anglia numbers describe July to September as a block and not September alone.