Mansion tax U-turn spares thousands of London homeowners as research shows 9.4% would have been caught
Nearly a tenth of London’s property listings would have been drawn into the mansion tax under a plan Chancellor John Healey has now rejected.
Estate agency Yopa analysed current for-sale listings across England. It modelled what would happen if the High Value Council Tax Surcharge (HVCTS) threshold dropped from £2 million to £1.5 million.
How does the High Value Council Tax Surcharge work?
The High Value Council Tax Surcharge was announced by Chancellor Rachel Reeves in the November 2025 Autumn Budget. It comes into force in April 2028.
Charges run from £2,500 per year for properties between £2 million and £2.5 million, rising to £7,500 for those worth £5 million or more. The levy falls on owners, not occupiers.
Property taxes have been delivering a growing Treasury windfall, partly driven by the 2024 stamp duty surcharge hike. The Sunday Times and the Financial Times reported that Healey ruled out the change, citing Treasury reluctance to widen the scope ahead of the October Budget.
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How many homes would the mansion tax have affected nationally?
Yopa based its research on residential property listings across England, sourced from Rightmove on 6 October 2026. At the existing £2 million level, 11,848 of the 792,456 homes listed in England sit at or above that mark. That is 1.5% of all homes currently on the market.
Had the threshold dropped to £1.5 million, the number of affected homes would have risen to 22,092 — or 2.8% of listings nationally. The difference is 10,244 additional properties drawn into potential scope — a near-doubling of affected homes based on October 2026 asking prices.
Why would a lower mansion tax threshold have hit London hardest?
The national figures are modest in proportion. The impact, however, would have fallen heavily on London.
Of the 11,848 homes above £2 million across England, 6,963 sit in the capital — 59% of the national total. At the existing threshold, those properties account for 5.8% of all London listings.
Under a £1.5 million threshold, the London count would have climbed to 11,316 homes. That is 9.4% of all properties currently for sale in the capital. The U-turn therefore prevents a further 4,353 London homes from entering the potential tax bracket.
Outside London, the East of England sits at 1.4% of listings above the lower threshold, and the South West at 1.7%. The South East would have faced the largest regional exposure: 5,025 homes at £1.5 million or more, equal to 3.4% of available stock.
Mansion tax market impact
Proportion of available listings above £2m and £1.5m thresholds, by region. Source: Yopa / Rightmove, 6 October 2026.
| Location | Total listings | £2m+ share | £1.5m+ share |
|---|---|---|---|
| East Midlands | 75,493 | 0.3% | 0.5% |
| East of England | 98,062 | 0.6% | 1.4% |
| London | 120,645 | 5.8% | 9.4% |
| North East | 26,653 | 0.2% | 0.5% |
| North West | 91,135 | 0.4% | 0.9% |
| South East | 147,575 | 1.6% | 3.4% |
| South West | 100,885 | 0.8% | 1.7% |
| West Midlands | 79,335 | 0.5% | 1.0% |
| Yorkshire & Humber | 52,673 | 0.4% | 0.9% |
| England | 792,456 | 1.5% | 2.8% |
Source: Rightmove via Yopa, 6 October 2026
What does the mansion tax ruling mean for mortgage brokers?
For brokers advising clients near the £1.5 million mark, the decision removes a near-term pricing overhang. Valuations and buyer confidence across the capital had both been affected.
Recent analysis of London’s priciest postcodes has documented softening demand and subdued transaction volumes heading into the October Budget.
Verona Frankish, chief executive of Yopa, said the research highlights how much broader the surcharge’s reach could have been.
“This is particularly true in London, where almost one in every 10 homes currently on the market would have fallen within the scope of the tax under the lower threshold,” Frankish said. “The decision to rule out such an expansion will come as welcome news to many homeowners and prospective buyers across the capital.”
Frankish argued that the mansion tax label obscures what the surcharge actually captures in high-cost urban markets. “The concern has always been that £1.5m doesn’t necessarily buy you a mansion in London.
“In many parts of the capital, this is the price of a perfectly ordinary family home, and lowering the threshold would have risked unfairly penalising homeowners who are property wealthy on paper, but aren’t necessarily enjoying the lifestyle or disposable income that the term ‘mansion tax’ implies.”
With the £2 million threshold now confirmed, the immediate uncertainty lifts for brokers advising clients at the top of the market. But the mansion tax structure remains open to revision, and the October Budget will be the next test.
