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Around 150,000 individuals in England are expected to receive a new annual tax bill from April 2028 simply because of what their home is worth. The latest mansion tax November 2026 picture is now clearer: on 28 October 2026 the government published its consultation response on the High Value Council Tax Surcharge, confirming who pays, who is exempt, and when owners will find out [1]. For Notting Hill, Kensington and the wider West London market, where £2 million homes are commonplace rather than rare, the detail matters.
Key Takeaways
- The surcharge applies to homes in England valued at £2 million or more and will cost between £2,500 and £7,500 a year, depending on value [1].
- It is paid by the owner, not the occupier, and is collected with council tax from April 2028, with the revenue going to the Treasury rather than councils [1].
- The 28 October 2026 consultation response confirmed payment deferrals, a short list of exemptions and discounts of up to 100% for certain property types [1].
- Owners are expected to learn whether they are affected in autumn 2027, and HMRC is recruiting 300 extra valuation staff to carry out the work [1].
- The £2 million threshold is already shaping prices: 83% of offers within 10% of £2m came in below the line in February 2026 [1].
Mansion Tax November 2026: What Has Been Confirmed
The High Value Council Tax Surcharge was first announced in the Budget of 26 November 2025. Nearly a year on, the policy has moved from headline to hard detail [1].
According to the HomeOwners Alliance summary of the government's consultation response, the core rules are as follows [1]:
Empty properties face a heavier bill. A substantially unfurnished home that has been unoccupied for 12 months or more will attract a 100% premium, taking the surcharge to between £5,000 and £15,000 a year [1].
The Chancellor has reportedly ruled out lowering the threshold to £1.5 million, although the HomeOwners Alliance notes this has not been confirmed as formal policy [1].
Exemptions, Discounts and Deferrals
The consultation response confirmed three forms of relief [1].
Exemptions apply to purpose-built student halls, care homes, long-stay hospital accommodation, hospices and qualifying military barracks.
Discounts of up to 100% are available for registered social housing providers, working farmhouses, farmworker accommodation and qualifying charitable accommodation.
Payment deferrals have been confirmed, which will matter to owners who are asset-rich but income-poor, such as long-standing residents of Notting Hill whose homes have risen in value over decades.
None of these reliefs are designed for a typical private owner of a West London townhouse or large flat. For most Notting Hill households above the line, the question is not whether the tax applies but how the home will be valued.
How £2m+ Valuations Will Work and Why West London Is Exposed
Owners are expected to learn in autumn 2027 whether their property falls into the surcharge, and HMRC is adding 300 valuation staff to handle the task [1]. That gives owners roughly a year to prepare.
The threshold is already distorting behaviour around the £2 million mark [1]:
- Average discounts on £2m+ homes reached £284,583 so far in 2026, up from almost £244,000 a year earlier, according to Telegraph figures cited by the HomeOwners Alliance.
- Hamptons estimates there are now 8,800 fewer £2m+ homes in England than when the tax was announced, cutting the expected yield by about £28 million a year.
- In February 2026, 83% of offers within 10% of £2m came in below the threshold, up from 64% a year earlier.
Four London councils have argued that the surcharge will hit their residents disproportionately [1]. The wider London market is also softening: the Lloyds House Price Index reported Greater London prices down 3.1% year-on-year in October 2026 to an average of £524,892, the largest regional fall in the country [2].
For a home hovering near £2 million, a well-evidenced valuation could be the difference between no surcharge and a bill of £2,500 or more every year.
Mansion Tax November 2026: The Political Backdrop
Prime Minister Andy Burnham has ruled out changing or scrapping stamp duty in this year's Budget, and rejected plans to replace stamp duty and council tax with a single annual property tax "at this stage" [1]. Council tax bands remain based on 1991 values.
On 7 October 2026, Conservative leader Kemi Badenoch pledged to scrap stamp duty on main homes and abolish the mansion tax. These are party pledges rather than government policy, so owners should plan on the basis of the law as it stands [1].
What This Means for Notting Hill Owners, Buyers and Sellers
Owners near the threshold should start gathering evidence now. HMRC valuations will be desk-based for most properties, and an independent RICS Red Book valuation, supported by a record of condition, gives owners a credible basis for challenging a banding they believe is too high.
Sellers of £2m+ homes should expect buyers to price in the surcharge and to negotiate harder, as the discount data already shows [1].
Buyers should ask whether a property is likely to fall above or below the line in autumn 2027, and factor the running cost into their offer. A Level 3 building survey can also reveal condition issues that legitimately affect value.
A chartered surveyor can provide:
- A formal RICS Red Book valuation as at the relevant date.
- A schedule of condition documenting defects that reduce market value.
- Advice on whether planned works could push a property over the threshold.
FAQ
When does the mansion tax start?
The surcharge is collected with council tax from April 2028. Owners are expected to be told in autumn 2027 whether their home is affected [1].
Who pays the surcharge on a rented property?
The owner pays, not the tenant or occupier [1].
Can the bill be deferred?
Yes. The 28 October 2026 consultation response confirmed that payment deferrals will be available, alongside exemptions and discounts for specific property types [1].
Is the threshold going to be lowered to £1.5 million?
The Chancellor has reportedly ruled this out, although it has not been formally confirmed as policy [1].
Conclusion
The mansion tax November 2026 position is settled enough to act on. The charge, the start date, the reliefs and the valuation timetable are all confirmed, and the only open question for most Notting Hill owners is which side of £2 million their home will land on.
Next steps: check recent sale prices on your street, commission an independent valuation if your home sits anywhere near the threshold, and keep a dated record of condition. Preparing before HMRC's autumn 2027 notices arrive puts owners in a far stronger position than reacting afterwards.
References
- HomeOwners Alliance, "Property Tax UK 2026: New Taxes, Mansion Tax And More", updated 2 November 2026. hoa.org.uk.
- Reuters via Investing.com, "UK house prices post biggest annual fall since October 2023, Lloyds says", 6 November 2026. investing.com.