Article Synopsis
This article looks at the ‘mansion tax’ that was revealed in November’s Budget – which properties it affects, how it will work, and how much money it is expected to raise for the Government.
This article is a three-to four-minute read.
One of the elements of Chancellor of the Exchequer Rachel Reeves’ recent Budget was the introduction of the so-called ‘mansion tax’. As this is likely to affect properties mainly in the south-east of England and London, Maunder Taylor have been taking a closer look at it.
Maunder Taylor – Independent Estate Agents in Whetstone
At Maunder Taylor, we offer traditional estate agency services, including residential and commercial property sales. We can also help you if you are interested in commercial lets or property investment.
What is the Mansion Tax?
The official name of the charge is the High Value Council Tax Surcharge. It will apply to all residential properties valued at £2million or more, affecting owners of tens of thousands of properties in England (and particularly the south-east)
- Properties valued from £2m to £2.5m will pay £2,500
- Properties valued from £2.5m to £3.5m will pay £3,500
- Properties valued from £3.5m to £5m will pay £5,000
- Properties valued at more than £5m will pay £7,500.
The valuations will be based on 2026 assessments provided by the government’s Valuation Office Agency – and not by estate agents such as Maunder Taylor, although we do offer house valuations across many parts of London and Hertfordshire.
The Government will now hold a consultation on what reliefs and exemptions will be put in place. This will include those people who live in a high-value property as a result of their job, or people who are ‘asset-rich’ but ‘cash poor’, such as retirees who have a low fixed income (usually a pension) and who may want to potentially defer payment until the property is sold or the owner dies. Social housing is also expected to be exempt from the new charge.
What Was the Reason for Introducing it?
One reason for introducing it was because it was a politically acceptable way of raising revenue for the Government without increasing basic income tax, which was a manifesto commitment. The measure is expected to raise around £400m annually by 2029-30.
It also addresses wealth inequality – it is a progressive tax in that it targets people who should be able to pay more. If you are asset-rich but cash-poor, then the argument is that you should downsize into a smaller or less valuable property.
How Will it be Collected?
The charge will be collected on top of your existing council tax. The current bands will stay where they are for now – the Government will just look at all properties currently in Bands F, G, and H (the three highest bands) to see which properties are valued above £2m.
However, the money won’t go to the local authority (to help it provide services) but directly to the Treasury.
What Will the Effect on House Prices Be?
The exact effects won’t be clear until the charge is introduced. However, The Office for Budget Responsibility says they expect there to be a degree of ‘price bunching’ where there would be an obvious incentive to value properties at just below the next band boundary. This could have the unwanted side-effects of slowing down the prime property market and reducing the Treasury’s tax receipts.
However, the monetary thresholds will be increased annually by Consumer Price Index inflation from 2029-30 onwards, and revaluations are planned every five years.
What Has the Reaction Been?
Some in the prime property market have noted the charge (a banded surcharge rather than an open-ended percentage) is “probably the least-worst outcome” they could have hoped for. Others have welcomed the certainty the measure has provided after a period of speculation, notably in the run-up to the Budget.
The measure has also highlighted the fact that existing council tax bands haven’t been updated since 1991, although to change these (following new property valuations) would be extremely difficult from a political perspective.
Those within the industry are also worried about the practical implementation and its cost; there may also be a long and expensive appeals process if you disagree with the VOA’s valuation.
Maunder Taylor – an Independent Estate Agent in Whetstone
At Maunder Taylor, we offer a wide variety of other property-related services as well as valuations and sales. So whether you need office lease negotiations advice in Hertfordshire, are interested in commercial lets in Totteridge, or want a quote for property insurance in Potters Bar, then you should call us on 020 8446 0011 (our main office) or 01707 665 666 (for residential block management enquiries only).
FAQS:
Q: Will the charge apply to second homes or buy-to-let properties?
A: Yes. The tax will apply to all residential property in England over the threshold. If you own multiple properties worth over £2m each, you will be liable for the surcharge on each one.
Q: Will making home improvements have any effect on whether I pay the charge or not?
A: Any renovations completed before April 2026 could push your property into a higher tax band. Improvements made after the valuation date typically won’t affect your bill until the next revaluation cycle (expected every five years).
Some critics have pointed out that the charge could deter homeowners from investing in improvements if they think it will push their property’s value into a higher band (above £2m).
Q: Will the charge apply to commercial properties?
A: No, it will apply to residential properties only. The Government did announce an increase in business rates for high-value commercial properties as part of the same Autumn 2025 Budget, but this is a separate measure.