The prime London rental market is presenting prospective tenants with an unusual paradox: while rents are continuing to edge higher, a massive influx of new listings means that choice is expanding at its fastest rate in years.
For the capital’s affluent renters, the era of acute scarcity and panic-induced bidding wars appears to be drawing to a close – at least for now – to be replaced by a far more balanced marketplace where negotiating power is slowly changing hands.
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According to the latest LonRes data, average achieved rents across prime areas rose by 2.4% on an annual basis in June. This represents the second consecutive month of positive rental growth, following a steady six-month stretch of falling values earlier in the year.
While these figures indicate that landlords are still achieving modest price gains – leaving average rental values a staggering 37.1% above their pre-pandemic (2017–2019) average – the underlying market dynamics tell a much more tenant-friendly story.
Supply streaking beyond tenant demand
The core trend is that rental supply is comfortably outpacing tenant demand. LonRes data reveals that new letting instructions jumped by 11.4% in June compared to the same month last year.
This steady stream of new instructions has significantly built up inventory; by the end of June, the total stock of available rental properties across prime London was 19.1% higher than it was twelve months prior.
At the same time, actual transactional activity has softened. The number of lets agreed in June experienced an annual decline of 1.1% (excluding listings in the Prime Fringe catchment due to data collection changes).
When a double-digit spike in new instructions meets a minor contraction in completed deals, the result is an increasingly crowded marketplace where properties sit vacant for longer.
The hyper-competitive market conditions that defined the post-pandemic rental boom from 2021 through 2023 have stabilised, replaced by a climate of deliberate comparison, thorough viewings, and patient negotiation.
First signs of Renters’ Rights Act impact
This shift in momentum is taking place against a backdrop of significant regulatory and economic change. June marked the second full month since the implementation of the Renters’ Rights Act (RRA) on May 1, 2026.
While it is too early to link the new law to the sudden surge in stock, the timing is notable. It is highly likely that landlords are actively repositioning their portfolios, adjusting their exit or leasing strategies, and listing properties to adapt to the post-RRA landscape.
Simultaneously, a struggling sales market is feeding into this supply surge. With prime London achieved house prices falling by 8.2% on an annual basis in June, some discretionary sellers are choosing to withdraw their properties from the sales block and place them on the rental market instead, preferring to wait out the sales downturn.
"Some discretionary sellers are choosing to withdraw their properties from the sales block and place them on the rental market, preferring to wait out the downturn."
However, for the ultra-luxury tier of the market, the impact of these new rules is non-existent. Tenancies where the annual rent exceeds £100,000 are classified as Common Law tenancies and are completely exempt from the Renters’ Rights Act.
Crucially, this exempt super-prime bracket is capturing a larger share of the market than ever before. Driven by years of compound rental growth, almost one-in-eight properties (12.1%) let across prime London in the first half of 2026 commanded rents at or above this £100,000 annual threshold.
This represents a substantial increase from historical norms, where such ultra-prime lettings consistently made up a much smaller fraction of the market. For these high-net-worth tenants, transactions remain unencumbered by the new legislative red tape.
A test of London landlord mettle
As prime London moves into the second half of the year, the widening gap between active stock and agreed lets is expected to test the resilience of landlords.
While rental values remain historically high, the 19.1% rise in available properties means tenants have the leverage to walk away from overpriced listings.
To secure reliable tenants in a highly supplied market, landlords will need to align their expectations with this new reality, prioritising sensible pricing over aggressive hikes.
