• Chancellor Rachel Reeves is preparing a new property tax targeting homes valued at £2 million or more ahead of the Autumn Budget.
  • The UK luxury property market is already showing strain, with sales agreed for homes over £2 million down 13% year-on-year amid tax uncertainty.
  • Estate agents report 34% of homes on the market have undergone price reductions—the highest proportion since early 2024—as buyers and sellers brace for potential changes.

Market Jitters Ahead of Budget

Chancellor Rachel Reeves is finalizing plans for a significant new property tax targeting high-value homes, with measures focused on properties worth £2 million or more expected to feature prominently in the upcoming Autumn Budget, according to people familiar with the matter.

The mere prospect of the tax is already rippling through the luxury property sector. Recent data shows sales agreed for homes over £2 million have plummeted 13% year-on-year, while transactions for properties between £500,000 and £2 million have fallen 8%. The uncertainty has created a chilling effect at the market's upper echelons, where buyers and sellers are adopting a wait-and-see approach.

"We're seeing unprecedented hesitancy in the prime market," said one London estate agent who requested anonymity to discuss client sentiment. "Deals that would have closed quickly are now stalling as wealthy buyers factor in potential tax liabilities that could run into tens of thousands annually."

Price Adjustments Accelerate

The tax speculation is forcing a market correction even before any formal policy announcement. Rightmove's November 2025 data reveals that 34% of homes currently on the market have undergone price reductions—the highest proportion since early 2024. The trend is particularly pronounced in London and the Southeast, where £2 million-plus properties are concentrated.

While the government has not confirmed the specific structure of the proposed tax, options under consideration include a new annual levy on high-value properties, increased stamp duty rates for luxury purchases, and adjustments to capital gains tax on expensive second homes. Treasury officials have been modeling various scenarios in recent weeks, though final decisions won't be made until closer to the budget announcement.

A spokesperson for the Treasury declined to comment on specific tax measures but stated that "the Chancellor is considering all options to create a fairer tax system while maintaining stability in the housing market."

Broader Market Implications

The proposed tax changes come as the broader UK housing market shows mixed signals. While the luxury segment cools, the average house price remains around £272,000 according to Land Registry data from September, with regions like the North East and Yorkshire experiencing stronger growth than London.

The number of homes for sale has reached a 10-year high, creating more options for buyers but also indicating that sellers are trying to exit before potential tax changes take effect. Analysts note that homes with high energy efficiency ratings are becoming increasingly desirable as buyers factor in long-term costs.

Efforts to reach several prominent estate agencies specializing in luxury properties were unsuccessful, though industry sources indicate that transaction volumes in the prime market could take several quarters to recover even if the final tax measures are less severe than feared.

Correction: An earlier version of this article misstated the timeframe for the sales decline data. The 13% drop in sales agreed for homes over £2 million is measured year-on-year, not quarter-on-quarter.