A recent analysis by e.surv Chartered Surveyors, based on resale data, reveals that almost 40 per cent of all flats in London changed hands at a loss for the seller during the twelve-month period up to August 2026. This development indicates a significant change in the London housing market, which requires particular attention.
The study highlights the increasing impact of various factors on the value development of flats across the UK. In particular, concerns regarding the form of ownership (leasehold), building safety, and the level of ancillary costs are identified as significant influencing factors.
Impact of Leasehold and Ancillary Costs
The specific leasehold form of ownership, which is widespread in the UK, has been under criticism for some time. Buyers in this system acquire only the right of use for a specific period, while ownership of the land and the building remains with a third party. This can lead to uncertainties and high follow-up costs, especially when extending the lease or paying ground rent.
Furthermore, issues of building safety, which have come into focus due to the consequences of the Grenfell fire, among other things, affect property valuations. Necessary refurbishments or increased insurance premiums can represent additional financial burdens for owners. The steadily rising service charges, which cover the maintenance and management of buildings, also diminish the attractiveness of flats and can negatively impact their resale value.
Regional Disparities and Market Forecasts
While e.surv's data primarily highlights the London market, the aforementioned influencing factors can also be applied to other regions of the UK. However, the capital, traditionally considered a robust property market, proves to be particularly sensitive to these developments. The results of the analysis underscore the necessity for investors and private buyers to thoroughly consider these aspects when evaluating residential properties.
- —Leasehold structure leads to uncertainties and potential additional costs.
- —Building safety issues can incur high refurbishment costs.
- —Rising ancillary costs (service charges) reduce the attractiveness and profitability of flats.
- —The period from August 2025 to August 2026 shows a high proportion of loss-making transactions.
The further development of the aforementioned parameters will be crucial for the stability of the British housing market. An adjustment of the legal framework for leasehold properties and transparent communication of cost structures could help to strengthen buyer confidence and stabilise the market.














