UK house price growth halved in September 2025, as rising mortgage interest rates and geopolitical tensions cooled buyer demand. According to Nationwide, the average British home price rose just 0.8% year on year to £274,251, down from 1.6% in August. On a monthly basis, prices dipped 0.2% after seasonal adjustments. It was the slowest annual pace since December 2024.
Why UK House Price Growth Is Slowing
The conflict in the Middle East has pushed energy costs higher, reigniting inflation fears. In response, financial markets now expect the Bank of England to raise interest rates further, which has driven up the market rates that underpin mortgage pricing. Robert Gardner, Nationwide’s chief economist, noted that “geopolitical tensions remain high” and are “fanning inflation concerns.”
As a result, mortgage costs have climbed. Moneyfacts reported that the average two-year fixed mortgage rate hit its highest level since July 2024, while five-year fixes also edged up. Higher borrowing costs are squeezing affordability, especially for first-time buyers.
Mortgage Rate Impact on Affordability
With mortgage rates rising, monthly repayments on a typical loan have increased significantly. For example, a £200,000 mortgage at 5.5% over 25 years costs about £1,228 per month, compared to £1,079 at 4.5%. This extra £149 monthly strain is forcing many buyers to delay or downsize their plans.
Key Data: UK House Prices and Mortgage Rates
| Metric | September 2025 | August 2025 | Change |
|---|---|---|---|
| Annual house price growth | 0.8% | 1.6% | -0.8 pp |
| Average house price | £274,251 | £275,000 | -0.2% MoM |
| Avg 2-year fixed mortgage rate | 6.2% | 6.0% | +0.2 pp |
| Avg 5-year fixed mortgage rate | 5.9% | 5.7% | +0.2 pp |
What This Means for Homebuyers and Sellers
- Buyers: Higher mortgage rates reduce purchasing power. Consider fixing for longer or increasing your deposit.
- Sellers: Price realistically. Overpricing risks lengthy void periods as demand softens.
- Remortgagers: Lock in a new deal early to avoid falling onto expensive standard variable rates.
- Investors: Rental yields may improve as buying slows, but financing costs are rising.
Outlook: Will House Prices Fall Further?
Much depends on the trajectory of inflation and interest rates. If the Bank of England raises rates again, mortgage costs could climb further, dampening price growth. However, a severe shortage of homes for sale may provide a floor under prices. Nationwide expects the market to remain subdued in the near term, with modest single-digit growth possible if inflation eases.
FAQ
Why did UK house price growth halve in September?
House price growth halved because rising mortgage interest rates, driven by Middle East tensions and inflation fears, reduced buyer demand and affordability.
What is the average UK house price now?
According to Nationwide, the average UK house price stood at £274,251 in September 2025, down 0.2% month on month.
Will mortgage rates continue to rise?
Mortgage rates could rise further if the Bank of England increases the base rate in response to persistent inflation. However, future moves depend on economic data and geopolitical developments.
Best Products We’ve Tested and Rated

Our testing team has hands-on reviews of exterior paint wood desert climate, stall mats horses, rubber flooring decking, cordless battery pressure washer, and thermal lawnmower. Every option below was compared across price, build quality, and real-world performance, with honest pros and cons. We update these guides regularly as new models arrive, so the recommendations stay current.
Our testing team has hands-on reviews of cordless pressure washer, robot lawn mower wireless, solar outdoor security lights motion sensors, and sectional. Every option below was compared across price, build quality, and real-world performance, with honest pros and cons. We update these guides regularly as new models arrive, so the recommendations stay current.