Volume of property in England and Wales owned by overseas companies nearly doubled over 10 years, with 91,791 properties now recorded, according to analysis by Search Acumen.
The value of these properties jumped from £15.9bn in 2015 to £125bn.
Jersey topped the list for both volume and value, holding £57bn worth of assets, which is 25% of all overseas-owned properties.
The British Virgin Islands followed at 21%, Guernsey at 13%, and the Isle of Man at 11%.
The biggest annual increase in the number of titles registered by overseas companies happened in 2017, with 6,955 properties.
In 2018, the highest value of new properties at £16.2bn was recorded.
Search Acumen compared current property ownership by non-UK companies to previous years and found a decline in the number of new titles being registered.
In 2024, 3,171 properties were registered, 210 less than the year before and 2,902 less than in 2019.
There were also 3,834 fewer titles in 2024 compared to three years earlier.
Despite fewer new registrations, the value of overseas-owned assets continued to rise.
The biggest increase in value came in 2021, with £16bn in new assets.
Since 2022, values have risen 44%, up by £38.5bn.
Andrew Lloyd, director at Search Acumen, said: “The size of property wealth currently under ownership by overseas companies is eye watering, doubling in a decade.
“Whilst there are some gaps and inconsistencies in the data from its source through government records, it is widely indicative of wider investor trends and system that can and does protect the world’s most wealthy.
“However, it is telling that the number of properties purchased by overseas-based companies are falling, currently at a ten-year low.”
Lloyd added: “This tells us two things; that either investors and the wealthy are buying assets and storing capital outside the UK, which is a troubling sign that our global appeal may be in decline, or that our property transaction system is becoming more stringent, noting increased transparency measures and anti-money laundering regulation in recent years deterring illicit purchases.
“The likely answer is a bit of both. We know that the UK’s exit from the EU had huge economic consequences, including on the property industry.
“New taxes and rules for overseas investment has played a critical role in the decline since 2022, seen as a less attractive place post-Bexit, whilst in turn opening up opportunities for more domestic businesses.”
He said: “We also saw in August 2022 the Register of Overseas Entities newly require overseas entities owning UK property to declare who their beneficial owners are, which included non-UK companies.
“This move indicated to the wider market a tighter grip on compliance by the government. Whilst reducing anonymity has to be a good thing, it may have in turn deterred some investors.
“This, combined with rising interest rates, higher borrowing costs, falling yields and slow capital growth, has likely made speculative investment less rewarding.”
