Are the latest property tax proposals unworkable?

Written by  Thomas Adcock - Partner, Tax
Published on:  21 August 2025

The government is reported to be considering sweeping reforms to property taxation. None of these ideas were in the party’s manifesto, so there is no electoral mandate for such wide-ranging change. Proposals include replacing stamp duty with a new property tax on sales above a certain threshold and introducing a capital gains style levy on higher-value main residences. These discussions come at a time when the London and South East property markets are already under pressure. 

What is being proposed 

The options on the table are significant. A national property tax charged on sellers. A capital gains style charge on higher-value homes. In time, even an annual levy that could replace stamp duty or council tax. 

 

Potential impacts 

These proposals risk backfiring. Faced with extra charges, many sellers may simply stay put. That would slow the market and reduce overall transactions. Lower volumes would mean less revenue, not more. 

 

The effect would be most visible in London and the South East. Prime markets are already struggling, with values down and sales subdued. Adding more tax could force prices lower. Some sellers might even use losses to offset gains on other assets, further reducing the tax take. Running both stamp duty and a capital gains style levy side by side would create complexity, disrupt cash flow and discourage mobility altogether. The scale of the reforms could also trigger significant public protest. 

 

Looking ahead 

For now these remain proposals only. Gravita will continue to track developments and provide clear updates on what confirmed changes could mean for clients. If you need advice on property tax, contact us today

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