National List
If your building is important to people all over the country, then it might be able to be added to the National List which is looked after by Historic England.
Listing is the term given to the practice of listing buildings, scheduling monuments, registering parks, gardens and battlefields, and protecting wreck sites. Listing allows us to highlight what is significant about a building or site, and helps to make sure that any future changes to it do not result in the loss of its significance
Historic England provides lots of guidance on their website about the selection criteria (reasons to add a building, archaeology or landscape) for listing, and how to go about getting a building listed.
