Flat owners in British cities are grappling with a new challenge as desperate sellers are cutting their losses, leading to significant price reductions that devalue entire apartment blocks. This trend is creating a cascading effect, where a sale at a reduced price sets a lower benchmark for subsequent properties in the same building.
This situation is particularly concerning for those looking to remortgage. Lenders typically assess property values by comparing them to recent sales in the vicinity. A cluster of significantly reduced sales can lead lenders to devalue existing properties, potentially preventing homeowners from securing the necessary funds.
Official data is beginning to reflect this downward pressure. Land Registry figures show that the average price of an inner London flat fell by £46,000 in the year leading up to August. Buyers are increasingly aware of these figures, often adjusting their offers accordingly.
Analysis by E Surv Chartered Surveyors found that nearly 40 percent of London flats resold between five and ten years after purchase during the year to August changed hands for less than their original price. Similar trends were observed in the South East and East of England, where about one-third of resold flats sold below purchase price. For flats bought new between 2020 and 2022 and resold between January and June 2026, 71 percent in London sold below their purchase price, according to Where To Live.
Examples of significant price drops are numerous. A two-bedroom flat in South Kensington, London, is listed for £750,000, a substantial decrease from its 2012 purchase price of £1.06 million. Another flat in Clapham, originally listed at £625,000, is now on the market for £312,500, having been bought for £483,300 in 2020.
Major cities outside London are also experiencing price declines. A two-bedroom flat in Manchester's Axis Tower is listed at £350,000 after a reduction from £500,000, down from its original purchase price of £480,000. In Birmingham, a one-bedroom city center flat is listed at £90,000, reduced from £140,000, having been bought for £163,950 in 2018.
Estate agents cite an oversupply of flats and a lack of willing buyers as key factors. Philip Jackson, director of Maguire Jackson estate agents in Birmingham, noted that sellers of modern apartments often compete with numerous identical properties within the same building. High mortgage rates and economic uncertainty have also deterred first-time buyers, further dampening the market.
Mortgage Implications
Lenders' valuation processes often rely on comparable sales data. If neighboring flats sell for significantly lower prices, a lender may refuse a mortgage application for a property priced higher. This can also lead to existing owners facing issues with remortgaging or falling into negative equity, where the property's value drops below the outstanding mortgage amount.
Nicholas Austin, branch manager at RiverHomes in London, explained that a loan that once covered 60 percent of a flat's value could now represent 80 percent, leading to higher interest rates. He also warned of negative equity risks for those with small deposits.
Furthermore, rising service charges pose another hurdle. Some banks now refuse mortgages on flats where the annual service charge exceeds 1 percent of the property's value, concerned about the ease of selling a repossessed property. In 2025, 37 percent of flats had service charges exceeding this threshold, up from 28 percent a decade prior.
The 'Downward Spiral' Effect
Owners in large apartment blocks, especially those with 100 or more units, are particularly vulnerable. The presence of numerous identical properties means that a price drop on one unit directly impacts the perceived value of all others. "The bigger the development, the bigger the problem," stated Austin, highlighting that if one identical flat slashes its price, others must follow suit to remain competitive.
In contrast, older flats, such as those in converted houses or mansion blocks, may be less susceptible due to their unique nature and generally lower service charges. These properties do not suffer from the same 'identikit' issues as modern, uniform apartment buildings.
Historically, flat prices have lagged behind house prices in the UK. Over the past decade, average flat prices rose 7 percent, compared to a 36 percent increase for houses, creating a 30-year high gap between average house and flat prices.
Estate agents suggest that a lack of confidence, coupled with potential interest rate hikes and tax increases, is contributing to the current market conditions. Government incentives for investors could help alleviate the oversupply of flats on the market. However, some experts believe the market is moving from a falling phase to a stagnant one, as recent exits by buy-to-let landlords due to new regulations are being absorbed by buyers.