What is the legality of building structures inspired by real locations in Minecraft?

If I see a real building, and attempt to build a different structure in Minecraft that I have got some vague inspiration from the real building, would I be legally allowed to build that in my model? Where does building copyright subsist? Does it apply to an approximate layout, or only to the exact measurements of the original? The same goes for copyright of ships, trains, and other man-made structures built in the last 100 years or so.

It doesn't apply here. Copyright exists to keep your ideas from being stolen and SOLD so you make the money you deserve. Building a real life building in mine craft isn't stealing anything or selling it

Trademark infringement if not altered sufficiently.

Perfectly legal, no one cares.

You can do whatever you want in minecraft, no one can stop you