Key Points
- Price Drop: The price of houses in Westminster is 25.4% lower compared to June 2026 when it was £1,145,000 on average; the average price in the current period is £854,000.
- Loss Level: The price level has been reduced by £291,000 for an average house price over one year.
- Wider London Context: This drop is connected with the general decrease of prices in the whole city as well, since the average house price in London decreased 2.5% to £554,000. It is the tenth month of the fall of average house prices in London.
- Reasons for the Price Drop: High mortgage rate, caused by instability in connection with the Iranian conflict, high transaction costs and vulnerability to foreign market demand are named among the reasons by experts.
- Speculations about Taxes: The speculation about possible changes in tax legislation initiated by Prime Minister Andy Burnham such as mansion tax and asset tax has affected the market.
- Market Adjustment to New Conditions: Specialists from PwC and property agents such as Knight Frank state that high initial prices in London needed such a significant adjustment.
London (Extra London News) August 19, 2026 – House prices in some of the most sought-after areas of central London have plummeted at an alarming rate, with official data revealing that nearly £300,000 has been wiped off the average property price in Westminster over the past 12 months.
According to the latest figures from the Office for National Statistics (ONS), the average house price in the borough of Westminster—a district that encompasses luxury postcodes such as Mayfair, Belgravia, and St John’s Wood—fell by 25.4% in the year to June 2026. This stark decline saw average values drop from £1,145,000 in June 2025 to £854,000 earlier this summer, equating to a total loss of £291,000 in a single year.
The data reflects a deepening slowdown across the capital. As reported by Felix Armstrong, Retail Reporter for City AM, London’s average house price slipped by 2.5% to £554,000 in the year to June, marking the tenth consecutive month of declining values for the city.
Why is the London housing market experiencing such a sharp decline?
The correction in prime London property is significantly more severe than in other regions, a phenomenon experts suggest is rooted in the unique vulnerability of the capital’s market.
As reported by Felix Armstrong of City AM, Paige Tao, an economist at PwC, stated that: “London’s underperformance is more than the mortgage rate story. High starting valuations, higher transaction costs and greater sensitivity to international demand mean the capital is having to adjust more than most regions.”
Further context provided in the City AM report suggests that these pressures have been compounded by geopolitical and macroeconomic instability. Specifically, property experts have identified the “higher mortgage rates caused by the Iran war” as a primary weight on the market, acting in tandem with the disproportionately high stamp duty costs borne by buyers in the capital.
How are government tax plans influencing property values?
The looming threat of new property taxes has created a atmosphere of uncertainty that analysts believe is cooling demand, particularly at the top end of the market. The Labour government, under Prime Minister Andy Burnham, has faced significant fiscal pressure, leading to discussions around a broader shift in how wealth and assets are taxed.
As noted by Property Wire, the government is moving forward with a “High Value Council Tax Surcharge”—often referred to as a “mansion tax”—which is set to apply to properties valued at £2 million or more in England starting in 2028. Tom Bill, head of UK residential research at Knight Frank, noted in his assessment for Property Wire that Prime Minister Andy Burnham faces “difficult fiscal decisions” to fund spending commitments, with taxes on assets and wealth appearing to be the “preferred funding method.”
This policy direction has left the market in a state of flux. Rathbones, in their analysis of the potential impact of the current government’s fiscal agenda, noted that “high-value houses in prime locations like central London might fall in value as buyers factor in higher ongoing tax costs.” The report further highlighted that while flats might retain some demand, the prospect of an annual charge linked to market value—often discussed as a potential “House Value Tax”—is viewed by many investors and homeowners as a significant risk to future valuations.
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Could the market have reached a ‘tipping point’?
Despite the gloomy figures, some analysts are looking for signs of a floor in the market. Jonathan Hopper, chief executive of the property portal Garrington, offered a cautious perspective in his comments to City AM.
As reported by Felix Armstrong of City AM, Jonathan Hopper suggested that while the monthly growth figures remain under pressure, there are indications that the market may be nearing a bottom. “While one month of Land Registry data does not a summer make, we may have reached a tipping point as tactical buyers who’d been waiting for the right moment to strike return to the London market,” he stated.
However, the outlook remains heavily dependent on future policy and macroeconomic stability. Knight Frank’s Tom Bill warned that while a “seasonal bounce in activity” might become more visible in the autumn as mortgage rates stabilize, the market’s trajectory remains tethered to “pre-Budget speculation” regarding potential tax hikes.
What is the broader impact across other London boroughs?
The downturn is not restricted to Westminster. Data highlighted by City AM shows that other affluent areas have also suffered significant double-digit declines. In Kensington and Chelsea, the average house price slipped by 14.7% to £1,250,000 in the year to June. Similarly, Hammersmith and Fulham saw a 13.3% drop to £726,000, while Camden experienced a 7.1% decrease, bringing the average price there to £833,000.
These figures illustrate a capital-wide recalibration, as the market adjusts to a combination of internal policy shifts and the lingering effects of the broader economic challenges faced by the UK over the past year. As the government continues to weigh its options for tax reform, the property market remains a primary focal point for both investors and policymakers alike.
