The UK tax authorities are set to begin assessments of luxury properties as part of a plan to impose a new council tax surcharge, often dubbed the “mansion tax.” This initiative targets homes valued over £2 million and is slated for implementation in April 2028. To accurately determine property values, valuation officers may conduct inspections that require access to internal features and precise property measurements.
According to the proposed surcharge structure, property owners with homes valued between £2 million and £2.5 million would incur an annual fee of £2,500. For those with properties worth up to £3.5 million, the charge would increase to £3,500. Homes valued between £3.5 million and £5 million would face a £5,000 charge, while properties exceeding £5 million would be assessed at £7,500 annually. This surcharge would be an addition to the current council tax and is expected to rise each year in line with inflation.
Inspections will focus on several factors, including the size of the property, architectural elements, and the number of bedrooms and bathrooms. The number of storeys will also be taken into account. Property owners who deliberately hinder valuation officers may be fined £200, whereas failing to provide necessary information without a valid excuse could result in penalties of up to £500.
The government has assured that these inspections will be conducted with the consent of property owners and in line with official guidelines. This measure is part of a broader effort to ensure that the tax system is equitable and reflects the current value of high-end properties.