here I present my new creation: a mansion.
I hope and you like this schematic.
the mansion is surrounded by a wall, inside the mansion we will find 4 floors, of which 1 is underground.
the building itself is 19 blocks high, but since it has an underground floor (10 blocks deep) then the total height is 29. to load the structure they only have to be at ground level, and make sure there is no nothing of importance below the place where the underground floor will be loaded.
I hope these details help you to avoid inconveniences when loading the structure.