You are absolutely correct, my mistake. Is there an appropriate tag to signal a future point in time for something to be checked?
@roelant This ambiguity is exactly what lead to me posting - my first instinct was to tag construction=*, but I then couldn’t find any combination of tags which reflected the situation on the ground. This discussion has been very fruitful, I have a much clearer idea of how to approach it.
@APneunzehn74 The building in question is already fully tagged - the only problem is that it shows up on maps as an open and running attraction, which it is definitely not at the moment. My goal was to modify it so that the current situation is clear, without losing any of the existing data.