Every year a single chart does the rounds and tells a bigger story than most market reports manage in fifty pages. This year it was Knight Frank’s Prime International Residential Index, the PIRI 100, which tracks the value of the world’s most expensive homes across 100 cities and second-home markets. The 2026 edition, published this April, ranks the ten markets that rose most over the full year of 2025 against the ten that fell hardest, and it is the freshest read we have going into the second half of 2026.

The headline is impossible to miss: while several of the world’s most established luxury markets went into reverse, Dubai posted a 25.1% gain and sat second only to Tokyo. London, for two decades the default home for global wealth, sat on the losing side of the table. If you hold property in the UK, or you’re deciding where to place capital next, that single contrast is worth understanding properly rather than from a caption on social media.

Below I break down what the data actually says, why it’s happening, and what it means specifically for UK-based investors looking at Dubai. I do this every week with clients moving capital out of a cooling UK market, so I’ll keep it practical.

The 2025 scoreboard: who rose and who fell

Globally, prime residential prices rose an average of 3.2% across 2025, a second consecutive year of growth, though slightly down on 2024’s 3.6%. Most of the 100 tracked markets still rose, but the gap between winners and losers widened sharply. This is a fragmenting market, not a uniform one.

Tokyo led the world at +58.5%, but that number deserves an asterisk: it’s driven largely by a historically weak yen that makes Japanese trophy homes look cheap to anyone buying in dollars or pounds, a currency play as much as a property one. Dubai’s +25.1%, by contrast, is the product of sustained, broad-based demand, which is why it matters more for anyone thinking about durable value.

Notice the geography of the losses. London, Vancouver, Toronto, Auckland and several Chinese cities, the traditional safe-haven darlings, all corrected. By region, the Middle East led the world at +9.4%, ahead of Latin America and the Caribbean (+4.7%), Asia-Pacific (+3.6%) and Europe (+3.3%). North America was the only region to fall overall, dragged down by Canada.

Why Dubai kept climbing

Dubai’s growth isn’t a fluke or a bubble headline. It rests on a stack of structural drivers that have compounded over several years and show no sign of reversing in 2026.

1. A genuine wealth magnet

The UAE was the world’s number-one destination for migrating millionaires in 2025, with an estimated net inflow of +9,800 high-net-worth individuals, ahead of the United States in second place. Dubai’s millionaire population has grown roughly 78% over the past decade to more than 72,500, with forecasts pointing toward 100,000 within a couple of years. Every one of those arrivals needs somewhere to live, and most buy at the premium end.

2. Zero personal income tax

There is no personal income tax, no capital gains tax on property, and no annual property tax in Dubai. For a UK investor used to income tax, capital gains tax, and a stamp duty regime that now layers surcharges onto additional and overseas-owned homes, the after-tax maths is a different sport entirely.

3. Residency you can actually use

A property investment of AED 2 million (roughly £430,000) qualifies the buyer for a 10-year renewable Golden Visa, with no requirement to live there full-time. Residency, tax status and a hard-asset purchase come bundled in a single transaction, something no major Western market offers.

4. The world’s deepest super-prime market

Dubai is now the undisputed global leader for residential sales above US$10 million, overtaking London, New York and Hong Kong. Liquidity at the top end means that when you want to exit, there are buyers, the quality that genuinely separates a resilient market from a speculative one.

Why London corrected: the UK story behind the chart

London’s place on the falling side of the table is the part UK investors most need to understand, because it isn’t a normal cyclical dip, it’s policy-driven, and the policy has changed the buyer base itself.

The end of non-dom status

In April 2025 the UK abolished the non-domiciled tax regime that had existed in some form for over 200 years, affecting roughly 74,000 residents. Combined with new inheritance-tax exposure on worldwide assets and a stamp duty surcharge on additional homes, the change removed the core financial reason many of the world’s wealthy chose to base themselves in London.

The numbers that followed

• Prime central London values have fallen more than 20% from their peak, with the steepest declines in the traditional trophy postcodes.
• Transactions for homes above £5 million dropped by around 36%.
• Agents reported that roughly 70% of high-end sellers were non-doms leaving the UK, with Dubai, Milan, Monaco and Miami the most common destinations.
• Henley & Partners forecast the UK would lose a net 16,500 millionaires in 2025, the largest outflow of any country in the world, and more than double China’s.

Put the two charts side by side and the migration is the whole story: the capital leaving London is, in large part, the same capital arriving in Dubai. For a UK investor, the question is no longer whether this shift is happening, but whether to be on the side losing value or the side gaining it.

The wider picture: it’s not just London and Dubai

The same forces show up elsewhere. Canada’s prime markets fell hard, Vancouver -7%, Toronto -8%, under the weight of a foreign-buyer ban and higher financing costs. Several Chinese cities corrected as domestic demand cooled, with Guangzhou the worst performer globally at -12%. Even Austin, a recent US boomtown, gave back ground.

Meanwhile the winners share a pattern: low or zero personal taxation, pro-investment residency routes, currency or lifestyle appeal, and constrained supply of genuine trophy stock. Miami (+18%) and Dubai are the clearest examples of capital flowing toward jurisdictions that actively want it. The lesson for an investor is to follow the policy, not the postcode prestige.

What this means if you’re a UK investor

None of this is a reason to panic-sell a London home, and it isn’t advice to do so, your position depends on your own circumstances, timeline and tax exposure. But the data does reframe the decision in three useful ways.

• Diversification has a clear destination. If your wealth is concentrated in a UK market that’s correcting and taxing harder, Dubai offers an uncorrelated, hard-currency-adjacent asset with strong yields and no income tax on rent.
• Timing favours the prepared. Dubai has run hard for several years; the easy gains in some districts are behind us. Area and project selection now matter far more than simply “buying Dubai.” This is exactly where the wrong choice gets expensive.
• The window on bundled residency is open now. The Golden Visa route ties together a real asset, long-term residency and a zero-tax base, unusually generous by global standards and worth understanding before rules tighten.

Markets correct, policies change, and the chart will look different again next year. But the structural reasons behind Dubai’s run, tax, residency, liquidity and migration, are still firmly in place now, well into 2026.