Assuming Blueprint A has a flat roof (by slab or floor) and that flat roof is equal to or larger than the footprint of Blueprint B, can you build B on top of A? (I’m not at home to test it).
If not, can we add that as a suggestion?
It specifically came to mind imagining a tower. Make a blue print of single, square building with internal stairs going up to the flat roof. Then just build that. And use the exact same blueprint to build another floor on top of that. And then on top of that… etc. Assuming Hearthlings don’t get nauseous from heights, you could build some pretty neat towers that way.
And that’s just off the top of my head. There may be other great ideas and inventions that could take advantage of a feature like that.
Obviously, the Build Tool needs to be cleaned up and fixed as it is before adding new features. I just wanted to toss this suggestion in. Thanks!