Rachel Reeves is reportedly considering a mansion tax on properties valued at £2m or more, with an annual charge of 1 per cent on the amount exceeding that threshold.
Economists, including former IFS director Paul Johnson, warn that this proposed tax would not significantly address the estimated £50bn Budget deficit.
Instead, experts advocate for a comprehensive overhaul of UK property taxes, suggesting reforms like making council tax proportional to current values and abolishing stamp duty.
Housing secretary Steve Reed refused to rule out the mansion tax, while concerns were raised that it could harm the economy and London's property market.
Critics, including Labour MPs and Liberal Democrats, argue for proper reform of the 'broken' property tax system rather than just short-term revenue generation.