From the Gulf to Your Mortgage: How the Iran Conflict Is Affecting Britain's Property Market

The conflict involving Iran may seem a long way from a house purchase in London or Surrey. Yet its effects can reach the UK housing market through a familiar chain: energy prices, inflation, interest-rate expectations and mortgage affordability.

It is important not to confuse those effects with a prediction that every house price will fall or that the Bank of England must raise rates. The outlook remains uncertain, and local property conditions still matter greatly.

From the Gulf to household bills

Disruption to energy production or shipping can increase the price of oil and other fuels. That feeds into petrol and diesel prices, distribution costs, utility bills and, potentially, the wider cost of living.

UK CPI inflation reached 3.1% in August 2026, according to the Office for National Statistics. Transport, including motor fuels, was a significant contributor to the increase. These pressures affect households directly, even before any change to mortgage rates.

Office for National Statistics: August 2026 consumer price inflation

Why mortgage rates matter

The Bank of England held Bank Rate at 3.75% at its September meeting, with the next decision due on 5 November 2026. It specifically identified the Middle East conflict and volatile energy prices as risks to the inflation outlook.

Bank of England: Bank Rate and latest decision

Bank Rate is not the same thing as the rate a borrower receives on a fixed-rate mortgage. Lenders also price mortgages using expectations of future interest rates, swap markets, funding costs and commercial considerations.

That distinction matters: fixed mortgage products can become more expensive even while Bank Rate is unchanged. Equally, a reduction in geopolitical risk could improve market expectations without an immediate Bank Rate cut.

What the latest housing indicators show

The September 2026 RICS Residential Market Survey, published in October, reported a -22% net balance for new buyer enquiries and a -18% net balance for agreed sales. Its headline house-price balance was -32%.

These are survey balances of respondents reporting rises against falls, not percentage falls in transactions or house prices. They point to weakening sentiment, rather than a uniform price movement.

London was among the weaker regions in that survey. However, the performance of a particular home will still depend on its location, condition, price, tenure, financing position and available competition.

RICS: September 2026 UK Residential Market Survey

What does this mean for sellers in West London and Surrey?

For sellers, the practical point is pricing and presentation. When borrowing costs are elevated and purchasers are more cautious, an asking price unsupported by comparable transactions is less likely to produce productive enquiries.

Well-presented homes can still attract committed buyers. Vendors should consider the evidence from completed sales, the quality of current competition and the likely profile of purchasers. The aim is not to discount indiscriminately, but to launch at a figure that can withstand scrutiny.

Where a property has a particular complication—lease terms, service charges, building safety documentation, probate requirements or a substantial works liability—that should be addressed early rather than left until conveyancing.

Buyers: focus on the total cost, not the headline rate

Prospective buyers should assess mortgage affordability using current product quotes and a sensible allowance for future household costs. Lenders' rates and product availability can change quickly; an agreement in principle is useful but is not a mortgage offer.

Cash purchasers may be less directly exposed to borrowing costs, but uncertainty can still affect negotiations and completion decisions.

Landlords and the rental market

The sales and rental markets do not always move together. RICS reported a +23% net balance for tenant demand in September, with landlord supply remaining constrained.

That supports a case for continuing rental demand, but it does not establish that rents will rise for every property. Landlords still need to balance rental positioning against void periods, maintenance, compliance and the financial position of prospective tenants.

A considered letting strategy should therefore account for both market demand and the property's ongoing costs.

Could the situation improve?

Yes. If energy pressures ease, expectations for inflation and future borrowing costs could also moderate. Conversely, prolonged disruption may keep costs elevated. Neither outcome is certain, and forecasts can change quickly.

The key is to avoid making a major property decision solely on a prediction about the next Bank of England meeting or the next geopolitical headline.

The Hermens perspective

For owners in Notting Hill, Kensington, West London, Weybridge and Surrey, the strongest approach remains evidence-led: compare genuine completed transactions, consider the property on its merits, prepare documentation early and choose a realistic marketing strategy.

Hermens Property provides personal sales, lettings and property-management advice, guided by legal expertise. If you are considering a sale or letting, we would be pleased to discuss the options.

Arrange a property valuation or contact Hermens Property.

Information and published indicators checked on 13 October 2026. This article is a general market commentary, not financial or mortgage advice.