The government’s proposed High Value Council Tax Surcharge (HVCTS), often referred to as “mansion tax”, is intended to apply to residential properties in England valued at £2 million or more from April 2028.
Under the current consultation proposals, liability will sit with the property owner rather than the occupier, regardless of who is living in the property. While the policy is aimed at ensuring owners of the highest-value homes contribute more towards local services, several practical and technical concerns remain.
Our rural and agricultural business experts explain the changes and what landlords and tenants need to know.
Impact on landlords and tenants
One of the most significant considerations is that the surcharge will be payable by the owner even where the property is let to a third party. In practice, landlords may seek to recover some or all of this additional cost through higher rents or recharges, meaning that the economic burden will ultimately fall on tenants rather than solely on property owners.
This raises wider questions around affordability and whether the surcharge could have unintended consequences for the high-value rental market.
Limited exemptions create uncertainty
The consultation proposes a relatively narrow range of exemptions and discounts. Notably, farmhouses and conditionally exempt historic houses are not currently included within the proposed exemptions, despite concerns raised by stakeholders during the consultation process.
For owners of agricultural properties, heritage assets and other specialist properties, this could result in substantial additional costs where the property exceeds the valuation threshold, regardless of the wider economic or public benefit those properties provide.
Deferral provision may not go far enough
The government has proposed a deferral mechanism for those who are asset rich but income poor, allowing eligible taxpayers to postpone payment until a later date. However, the proposed qualifying criteria appear restrictive, and the income thresholds are relatively low.
Many owners of large homes face significant ongoing costs associated with maintaining and preserving those properties, yet may not generate sufficient income to meet the extra surcharge comfortably. As a result, there is a strong argument that the deferral provisions should be broadened to ensure they provide meaningful support for those facing genuine cash flow pressures.
Expect an increase in valuation disputes
Valuation will inevitably be one of the most contentious aspects of the new regime. The surcharge will rely on identifying whether a property exceeds the £2 million threshold and, where applicable, which charging band it falls into. The consultation includes provisions for challenging valuations and liability decisions, recognising that disputes are likely to arise.
Given the substantial differences in annual charges between valuation bands, owners will have a strong incentive to challenge assessments where they believe a property has been overvalued. This is likely to create a significant volume of appeals and place considerable pressure on valuation and administrative processes.
Looking ahead
Although the consultation has now closed, the government’s response and the final design of the surcharge will be closely watched by property owners, landlords, farmers and advisors alike. With valuation methodology, exemptions and support mechanisms all attracting scrutiny, there remains potential for further refinement before the regime is introduced.
For those who may be affected, early planning is essential. Understanding the ownership structure of a property, reviewing potential valuation exposure and monitoring future developments will help ensure there are no surprises when the final legislation is published.
Get in touch with our team today to see how we can assist you.
