My property is Band F. I only bought it two years ago for £260,000 and I did challenge the council tax band after I moved in. I sent comparables to the valuation office but they fobbed me off. Essentially it seemed they would only uphold a challenge if the exact same style house on the exact same road had a higher band. There is nothing exactly the same as my house in the immediate vicinity.
I understand that the Mansion Tax will require a revaluation of properties in Band F upwards. My house will therefore be revalued as part of this process and would obviously not have increased in value to £2M in two years. Current value would be in the region of £275,000 - £300,000 tops I would guess. The house has not been extended and there's no improvement indicator recorded.
If the government revaluation agrees with this low valuation, would this not be enough evidence to re-band the property to a lower band? To go further, wouldn't this official revaluation result in an automatic rebanding? Essentially replacing/updating the 1991 value.