England’s new “mansion tax” is still due to begin in April 2028, with annual charges of £2,500 to £7,500 for owners of homes valued at £2 million or more. The government consultation has now closed, valuations are being prepared and around 156,000 properties could ultimately be caught by the scheme. Several important details, including the final rules on deferrals, exemptions and enforcement, remain subject to legislation.
The government’s proposed “mansion tax” is moving closer to implementation, although homeowners still do not have the final rulebook.
Officially called the High Value Council Tax Surcharge, or HVCTS, the new annual property charge was announced in the November 2025 Budget. It is scheduled to come into force in England from 1 April 2028 and will sit on top of existing Council Tax.
The latest position, as of 23 August 2026, is that the government consultation on the detailed design of the tax closed on 14 July. The government has not yet published its response or the final version of the scheme. The House of Commons Library says the main provisions are expected to be included in a future Finance Bill.
That distinction matters. The basic structure of the tax is government policy; some of the more detailed rules being discussed around exemptions, payment deferrals, appeals and enforcement remain proposals until the government confirms them and Parliament legislates.
How much will the mansion tax cost?
The planned surcharge has four bands, based on a property’s estimated 2026 market value.
| Property value | Planned annual surcharge |
|---|---|
| £2 million to £2.5 million | £2,500 |
| £2.5 million to £3.5 million | £3,500 |
| £3.5 million to £5 million | £5,000 |
| More than £5 million | £7,500 |
The charges will be payable in addition to ordinary Council Tax. The owner of the property will generally be responsible for the surcharge, rather than whoever happens to occupy the home.
The government also intends to uprate the charges in line with Consumer Price Inflation each year.
Crucially, the new bands have nothing to do with existing Council Tax bands A to H.
Someone living in a Band H property will not automatically pay the surcharge, and being in a lower Council Tax band does not automatically exclude a property. The Valuation Office Agency will conduct a separate valuation based on what the property was worth in 2026.
When does the mansion tax start?
The planned start date remains 1 April 2028.
There has been no official announcement cancelling or delaying the policy.
The Valuation Office, part of HM Revenue and Customs, is meanwhile developing the valuation system that will determine which homes fall within the new charge.
The government says fewer than 1% of English residential properties are expected to be affected.
The Office for Budget Responsibility estimated in April that around 165,000 homes would meet the criteria in 2028 before allowing for changes in homeowner behaviour.
Once anticipated responses such as appeals, non-compliance, changes in development and properties clustering below tax thresholds are included, the OBR expects around 156,000 properties to pay the charge in 2028/29.
How will houses be valued?
This is one of the most important parts of the scheme.
The government does not intend to send a valuer into every potentially affected house.
The Valuation Office says it plans to use what it calls a “model-assisted valuation approach”. Automated valuation models will analyse recent property sales and characteristics; professional valuers will then review and assure the estimates.
The information considered can include:
- recent sales of comparable homes
- property type
- property size
- age
- number of rooms
- parking
- Stamp Duty Land Tax information
- existing Valuation Office property data
- publicly available local authority plans
- geospatial information
Where there are lots of similar homes and reliable recent transactions, automated modelling can play a larger role.
Unusual properties, or homes in areas where there are few suitable comparable sales, are likely to require greater individual assessment by professional valuers.
That is particularly relevant at the top end of the property market, where one house may differ considerably from the next.
The government says the Valuation Office may contact owners where it needs confirmation or clarification about a property.
Could valuation officers inspect your house?
Potential inspection powers have attracted renewed attention this week.
Under the existing Council Tax framework, Valuation Office staff can in some circumstances seek information about properties and conduct inspections. Government guidance says that the VOA can normally obtain the information it needs externally; where an internal inspection is considered necessary, an appointment is generally arranged with the homeowner.
A parliamentary answer published on 23 June 2026 states that a person who intentionally delays or obstructs a valuation officer exercising their duties can face a fine of up to £200. A person who fails, without reasonable excuse, to provide requested information that they possess or control can face a fine of up to £500 under existing legislation.
The HVCTS consultation says the government intends to replicate the established Council Tax framework, with safeguards and processes, when obtaining information necessary to determine the new bands.
Reports published on Sunday have linked those existing powers specifically to the forthcoming mansion-tax valuation exercise.
The position should nevertheless be described carefully. The final HVCTS legislation and post-consultation rules have not yet been published, so the exact inspection and enforcement regime for this particular surcharge is not yet complete.
The government’s current valuation proposal relies heavily on existing records, sales information and automated valuation tools rather than routine internal inspections.
Could you be fined for failing to provide information?
The consultation contains a separate proposed penalty system for identifying who actually owns a property and is liable for the surcharge.
Under the proposal, councils could request information from people they believe to be owners.
If an apparent owner failed to respond within 21 days, a penalty equivalent to 10% of the annual HVCTS liability could be applied. After a further 21 days, this could rise to 30%.
Someone incorrectly identified as an owner would avoid the penalty by replying within the specified period and explaining that they do not own the property.
These percentages are consultation proposals rather than final law.
The government also asked whether councils should have powers to impose penalties on managing agents or other people who could help identify difficult-to-trace owners.
What happens if your house is valued just over £2 million?
Owners will be able to challenge their valuation.
The proposed system would allow a homeowner to challenge the Valuation Office where they believe:
- their property should not be on the HVCTS list
- their property has been placed in the wrong band
- the property has changed substantially
- the property has reduced in value because of a physical change
- the valuation does not reflect a relevant tribunal or court decision
If the dispute cannot be resolved, the proposed system provides for an appeal to the independent Valuation Tribunal for England.
This could become important around the £2 million boundary.
A property assessed at £1.99 million would face no HVCTS. A valuation of £2.01 million would produce an annual £2,500 bill.
Similar jumps occur at £2.5 million, £3.5 million and £5 million.
The OBR specifically expects “bunching” of property prices below these boundaries to form part of the behavioural response to the tax.
Falling house prices may already be reducing the number affected
There is evidence that the high-value property market has weakened since the surcharge was announced.
Analysis reported by the Financial Times in July, using figures from estate agency Hamptons, estimated that there were around 8,800 fewer homes above the £2 million threshold than when the measure was announced in 2025.
The analysis suggested between 1,000 and 1,500 homes were falling below the £2 million level each month during 2026 as prices changed.
That does not change the official threshold. It may change how many homes ultimately cross it.
The Office for Budget Responsibility has already incorporated significant uncertainty into its forecast, including possible appeals and changes to the high-value housing market.
Will pensioners and people with low incomes have to pay?
Potentially, although the government intends to create a system allowing some homeowners to defer payment.
This has been one of the most politically sensitive aspects of the scheme.
A homeowner may have bought a property many years ago at a much lower price and subsequently seen its market value rise above £2 million without receiving anything resembling a £2 million income.
The government consultation proposes allowing qualifying owner-occupiers to postpone the surcharge until the property changes ownership.
The consultation suggested eligibility where a household has:
- annual household income of £35,000 or less
- capital savings of £16,000 or less
It also proposed eligibility in certain circumstances where someone in the household is disabled or meets the relevant Council Tax criteria.
The scheme would apply to a person’s main residence.
The government does not propose allowing companies or owners of second homes to use the normal deferral arrangement.
Again, these precise thresholds were put out for consultation and have not yet been confirmed as the final rules.
Deferring the tax would probably mean paying interest
Deferral would postpone the bill rather than erase it.
The government proposes securing deferred HVCTS debt against the property, allowing the accumulated liability to be recovered when ownership changes.
Interest would also apply.
The consultation offered several possible interest benchmarks, including the HMRC official rate, the Bank of England base rate or the rate used for deferred adult social-care payments.
At the time of the consultation, the examples ranged from 3.75% to 4.75%.
The final interest mechanism has not yet been announced.
For a homeowner using deferral for many years, the interest rate could therefore become almost as important as the annual surcharge itself.
Are there exemptions?
The government consultation proposed a number of exemptions or discounts for property types that it does not intend to tax in the ordinary way.
The House of Commons Library lists proposed exclusions covering categories including social housing, student halls of residence, military accommodation and diplomatic accommodation.
The government distinguishes between exemptions and discounts.
An exempt property would not normally be valued for HVCTS at all.
A property receiving a discount could still be valued, with the owner then applying to the local authority for a reduction potentially reaching 100%.
The final list remains subject to the government’s response to the consultation.
What about second homes?
The surcharge is based primarily on ownership and property value, rather than whether the property is somebody’s main home.
A second home worth £2 million or more can therefore fall within the scheme.
The consultation also raises the possibility of going further.
The government asked respondents whether an additional HVCTS premium should be charged where an affected property is owned by someone who is not UK-resident.
No such premium has yet been confirmed.
How often will homes be revalued?
The government plans to conduct revaluations every five years.
Following the initial 2026 valuation, the next general revaluation is expected in 2033.
Newly built properties after the April 2028 launch can be valued when completed or occupied.
If an owner substantially improves an existing property, the government does not generally intend to raise its HVCTS band immediately simply because work has been carried out.
A substantially improved property would normally be reconsidered when it is sold, divided, merged or reaches a general revaluation.
How much money will the mansion tax raise?
The government currently expects the tax to raise around £430 million a year once established.
Budget forecasts originally showed approximately £400 million of receipts in 2028/29 and £430 million in the following year.
That is meaningful revenue, but modest compared with the overall Council Tax system.
Council Tax raised £40.3 billion in England in 2024/25.
The government’s case for the policy is therefore as much about the distribution of property taxation as the absolute amount of money raised.
Its central argument is that Council Tax remains linked to 1991 property valuations, producing unusually low effective tax rates on some exceptionally valuable homes.
At the time the surcharge was announced, the Treasury said the average Band D home in England paid £2,280, around £250 more than the Council Tax charged on a £10 million Mayfair property used as its example.
Opposition is building in London
The tax will be geographically concentrated.
Four London councils, Richmond upon Thames, Kensington and Chelsea, Westminster and Wandsworth, said earlier this month that their residents could collectively contribute around £275 million, more than half of the expected national total.
The councils have urged the government to reconsider the policy, arguing that high property values do not necessarily translate into high household incomes and that long-standing residents could be disproportionately affected.
They have also criticised the way the revenue is collected. Although local councils will administer the surcharge, the money will be collected on behalf of central government rather than simply retained by the authority where the property is situated.
The Chartered Institute of Taxation has separately warned that the measure risks producing a “parallel” property-tax system because existing Council Tax will continue to rely on 1991 values while the HVCTS uses contemporary valuations.
What does the mansion tax mean for Sheffield and Yorkshire?
The effect is expected to be much smaller in Yorkshire than in London and the South East.
House of Commons Library analysis of Land Registry transactions found only 65 residential properties sold for £2 million or more across Yorkshire and the Humber between January 2024 and April 2026.
By comparison, individual central London constituencies recorded hundreds of qualifying sales over the same period.
That figure cannot be used to say exactly how many Yorkshire homes will pay HVCTS. It counts transactions rather than every existing property and does not represent the VOA’s future valuation list.
It does show how geographically concentrated £2 million housing remains.
For Sheffield homeowners generally, existing Council Tax will continue unchanged by the creation of the HVCTS. Sheffield’s 2026/27 Council Tax runs from £1,670.22 for Band A to £5,010.65 for Band H; those bands remain based on estimated 1991 property values.
Only homes separately assessed at £2 million or more in 2026 would enter the new surcharge system.
Has the mansion tax definitely become law?
The government has committed to introducing it, but the detailed legislative process is not finished.
This is the most important part of the latest update.
The £2 million starting threshold, four-band structure, April 2028 introduction and owner-based liability form the announced policy.
The consultation into implementation closed on 14 July 2026.
As of 23 August 2026, the government has not published its formal consultation response. The Commons Library says the principal provisions are expected in a future Finance Bill.
Consequently, reports suggesting every operational detail is already fixed should be treated cautiously.
The broad scheme is clear.
The final rules are still being written.
Mansion tax latest: the position in brief
For homeowners trying to establish where things stand today:
The High Value Council Tax Surcharge remains scheduled for April 2028.
It applies only in England.
The starting threshold is £2 million based on 2026 property values.
Charges currently range from £2,500 to £7,500 per year.
It is charged on owners and comes on top of normal Council Tax.
The VOA is developing a targeted valuation process using property data, automated valuation modelling and professional valuers.
Around 156,000 properties could ultimately pay in the first year after behavioural effects are taken into account.
Owners will have a right to challenge valuations.
A payment-deferral system is planned for some people with limited income, savings or qualifying circumstances.
The consultation has closed, but the final government response and legislation have not yet been published.
For most households in Sheffield and the wider Yorkshire region, the tax is unlikely to apply directly. For owners of homes close to or above £2 million, the next significant development will be the government’s response to the consultation and the legislation setting out the final scheme.
Sources
HM Treasury, Budget 2025 and High Value Council Tax Surcharge guidance.
Ministry of Housing, Communities and Local Government, HM Treasury and HMRC, High Value Council Tax Surcharge consultation, 19 May 2026.
House of Commons Library, High Value Council Tax Surcharge, 21 July 2026.
House of Commons Library, High Value Council Tax Surcharge and homes over £2 million, 2 July 2026.
Office for Budget Responsibility, Costing of High Value Council Tax Surcharge, 2 April 2026.
UK Parliament, written answer on Valuation Office penalties, 23 June 2026.
Sheffield City Council, Council Tax bands and charges for 2026/27.