Non-Dom Tax Overhaul Freezes Overseas Sellers Out of UK Property Market

Fresh research into the UK's overseas-owned property stock has found that international owners are markedly slowing the pace at which they sell UK homes, with the trend directly attributed to the sweeping tax changes introduced over the past 18 months. The findings suggest that the abolition of the non-dom regime, the extension of inheritance tax to worldwide assets for long-term UK residents, and tighter capital gains rules on non-resident disposals have combined to make overseas owners far more cautious about triggering a sale — even in cases where they might otherwise have looked to exit.

This matters enormously for the UK property market because overseas capital has underpinned prime segments of the housing stock for two decades, particularly in London and the South East. Historically, non-resident and non-dom owners have accounted for somewhere between 8% and 13% of transactions in prime central London postcodes, and a meaningful proportion of high-value stock in Surrey commuter towns such as Esher, Weybridge and Virginia Water. When this cohort changes behaviour — whether by buying less or selling less — the ripple effects touch pricing, supply, and liquidity across an entire tier of the market that domestic buyers often struggle to access in any case.

The mechanics of the slowdown are straightforward once the tax detail is unpicked. From April 2025, the remittance basis was abolished and replaced with a residence-based system that pulls long-term UK residents' worldwide assets into the inheritance tax net after ten years of residence. Combined with capital gains tax now applying in full to non-resident disposals of UK residential and commercial property — a regime tightened progressively since 2015 and extended to commercial assets in 2019 — many overseas owners face a materially higher tax bill on exit than they would have three or four years ago. Rather than crystallise that liability now, research indicates a growing number are choosing to sit tight, wait for further policy clarity, or restructure ownership through trusts and corporate vehicles instead of an outright sale.

The regional picture is uneven but instructive. In prime central London, where overseas ownership is most concentrated, agents report holding periods extending well beyond the five-to-seven-year norm seen in the 2010s, with some owners now holding for a decade or more. Surrey's premium family-home market, long popular with returning expatriates and Asian and Middle Eastern buyers, is seeing a similar pattern of delayed disposals, tightening available stock even as headline demand softens. Regional cities tell a different story: in Manchester, Birmingham, Leeds and Liverpool, where overseas ownership skews more heavily towards buy-to-let investment in new-build apartments rather than family homes, the tax changes are having less impact on sale timing but are beginning to dent fresh acquisition appetite, particularly from Hong Kong and Singaporean investors who have been significant net buyers of northern city-centre stock since 2020.

For UK-based market participants, the consequences cut in different directions. Domestic buy-to-let landlords competing for prime stock may find fewer distressed or motivated overseas sellers coming to market, keeping asking prices firmer than transaction volumes would otherwise suggest — a supply-constrained equilibrium rather than a genuinely strong market. First-time buyers are largely insulated, since this cohort rarely competes for the six- and seven-figure homes overseas owners typically hold, though any eventual unwinding of pent-up overseas stock could eventually filter through to improve choice at the upper end and loosen chains beneath it. Commercial investors face a more immediate effect: overseas capital has been a critical source of liquidity in London office and mixed-use investment markets, and any hesitancy to sell — or indeed to buy — reduces transaction volumes at a moment when commercial property valuations are already adjusting to higher interest rates. Developers targeting overseas pre-sale buyers for new-build schemes in London and Manchester will need to recalibrate marketing and pricing assumptions, since the tax calculus for a prospective non-resident purchaser has fundamentally changed.

Looking ahead six to twelve months, expect this slowdown to persist rather than reverse quickly. The Treasury has shown no appetite to soften the residence-based IHT regime, and further fiscal tightening is plausible given ongoing pressure on public finances, meaning overseas owners have little incentive to test the market until the rules bed in and case law or HMRC guidance provides more certainty on edge cases. The most likely outcome is a continued bifurcation: prime London and Surrey markets will see suppressed transaction volumes but resilient pricing due to constrained supply, while regional buy-to-let markets reliant on overseas purchasing — Manchester and Birmingham in particular — will need domestic and institutional capital to fill any gap left by retreating international buyers. Investors and agents who can identify and service that gap, rather than waiting for overseas demand to return unchanged, stand to gain the most from this realignment.