What if a real-world property is demolished or destroyed? Does that affect my NFT?

Your Mapstone NFT is tied to the permanent GPS coordinates of the address, not the physical structure that happens to exist there at any moment in time.

If a property is demolished, rebuilt, renamed, or renovated, the NFT remains unchanged because the underlying geographic location—and its coordinates—never change. Your NFT will always represent that precise spot on the map, regardless of what is built or rebuilt on top of it.