What council tax band is it?

It might well say in the estate agent details what council tax band the property is in, but how do you check to confirm it?
There’s a site that has the Council Tax Valuation List which shows you. You need to identify the billing authority – which you can do by picking from a drop down list or putting in the postcode of the property.
It’ll show the current band and if the band is going to go up! Look for the Band review pending indicator
When a property is improved (e.g. an extension is built), legislation prevents the VOA from increasing the existing band of that property until there is a “relevant transaction”. The relevant transaction can be buying the leasehold or selling the property.
It’s always worth double checking the council tax band of a property before you buy it – just so you can accurately budget your new house!