How will new council tax surcharge on homes actually be figured out?

Contributing sentiments towards policy:

61% : There's a reasonable case for levying more high-value homes, but the design of this tax leaves much to be desired.
56% : The "high-value council tax surcharge" will include four price bands, rising from £2,500 for a property valued between £2m to £2.5m, to £7,500 for a property valued at £5m or more, all uprated by inflation each year.
55% : It has previously been reported that in order to facilitate any kind of "mansion tax", the government would revalue properties in the three highest council tax bands - F, G and H - to assess who is liable to pay the levy.
53% : However, a Treasury document explaining the new council tax surcharge says a "targeted valuation exercise" will be conducted by the Valuation Office to identify properties above £2m - expected to be fewer than 1% of properties in England.
51% : Knight Frank's Bill said more properties would inevitably get "dragged into the mansion tax net, which means the proportion of terraced houses, flats and semi-detached homes will grow over the years, particularly in the capital.
50% : Properties worth more than £2m will be subject to a so-called "mansion tax", Rachel Reeves announced in her budget on Wednesday.
49% : The measures are projected to raise £400m in 2029-30, and though the money will be collected via council tax, all the cash will go to central government rather than local authorities.
49% : " Ingrid McCleave, a partner and tax specialist at city law firm DMH Stallard, said: "The Valuation Office is going to be very busy identifying which properties will be caught by the new surcharge.
44% : If your home is in council tax bands A to E, it's unlikely that you will be affected by the plans, though the surcharge isn't based on particular bands so it's not impossible.
42% : Previous criticism of the council tax system has pointed out that current bands are based on rushed valuations carried out in 1991, and that growth of property prices has varied considerably across the UK since then, meaning that someone living in a valuable home in London could be paying less council tax than someone in a less expensive house in the North of England, depending on valuations carried out 34 years ago.
40% : " "The term 'mansion tax' will increasingly feel like a misnomer," he added.
36% : Here, Yahoo News explains how to check if you will be affected by this tax change and what it means for you. Which council tax bands could be affected?
34% : But while the surcharge won't be related to council tax bands, there are question marks over how the properties that fall into its brackets will be identified and it remains unclear exactly how these valuations will be undertaken accurately The Institute for Fiscal Studies (IFS) has criticised the tax, saying: "When it comes to property, we now have a council tax system based on 1991 values, with a new complicated bolt-on for high-value houses based on what the house is worth today.

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