I’m in the middle of trying this myself as our neighbour’s house is very similar but a Band F, and we are band G. The assessor came around and among her information she had our house size as 199m2 and the neighbour at 149m2. I asked her measuring criteria, did the measurements myself the next day and came up with 175 for ours and 173 for the neighbour! She thinks our house is near the border. band G orginally covered houses valued something like £102k – 206k, and when I look at houses across the road that sold for twice what ours sold and on the same band as us it’s a bit annoying. I’m going to pursue it all the way though.
Our tax is £3000 a year! The lower band would be £2600.
My wife recently had a battle with the council after their nursery school calculations had us paying £30/month that we weren’t supposed to pay. She won. We could be paying more than that in excess council tax, and for a life long house it’s worth the effort (£35/month over 40 years…).
Scottish assessor’s have a rule where you are supposed to apply for a change within 6 months of buying a place.