The UK government is set to implement a new council tax surcharge, colloquially known as the “mansion tax,” targeting high-value properties exceeding £2 million. Scheduled to come into effect in April 2028, this measure will involve valuation officers inspecting these properties to assess their worth accurately. The inspections will focus on the property’s internal features and dimensions, essential for determining its value for tax purposes.
Under the proposed surcharge system, property owners with homes valued between £2 million and £2.5 million will be required to pay an additional £2,500 annually. The charge escalates to £3,500 for properties valued up to £3.5 million, £5,000 for those between £3.5 million and £5 million, and reaches £7,500 for homes exceeding the £5 million mark. Importantly, this surcharge will be separate from the existing council tax and is designed to rise annually in line with inflation rates.
Valuation officers will examine several factors during their inspections, including the size of the property, architectural features, and the number of bedrooms, bathrooms, and storeys. To ensure compliance, property owners who obstruct these assessments could incur a fine of £200. Additionally, those failing to provide necessary information without a valid reason may face penalties of up to £500.
The government has emphasized that these inspections will be carried out with prior agreement from property owners and will adhere to official guidelines. This approach aims to ensure transparency and cooperation throughout the valuation process, minimizing potential disputes and misunderstandings.