Hello, I am Keith, one of the experts on Just Answer, and pleased to help you with your question.
Council Tax is bedevilled by different councils making different interpretations. However, here is some guidance from the Gov UK web site:
'If your property’s derelict
Your property’s only considered derelict if it:
isn’t possible to live in it, eg because it’s been damaged by weather, rot or vandalism
would need major structural works to make it ‘wind and watertight’ again
You can apply to get a derelict property removed from the Council Tax valuation list. You do this by making a formal challenge to the VQA.'
A route can be found through this web site:
Of course, you may find that the site is not on the valuation list at all, or if it is it reflects its original use which is no longer appropriate. Usually you have six months to dispose of such properties without incurring the tax, but as I have suggested the key is its place in the valuation list, if any. This may need amending.
I would be of the opinion that a vacant brownfield site cannot be the subject of council, but see the key above. I am supported by a political comment from Labour List [advocating a Land Value Tax]:
'With no tax on empty land in the UK, it can be more lucrative to acquire and hold onto swathes of empty land, watch its value rise as others invest in the area, and then sell it, than it is to develop it for people to live or work on.'
The original Capital Gains Tax in 1965 was created in part as an attempt to stop organisations acquiring, particularly office blocks [see Centre Point], and then leaving them empty, also to prevent people putting income into property, thus avoiding tax when the value increased and they sold tax free.
I do hope that I have been able to asist you with your inquiry and shed some light on your position.