Here's a series of pictures showing the Apothecary of Rake's Corner with modifications to allow it to assemble like a Fat Dragon Games building.
First, the assembled building:
Nice, right? But, that could be any old Dave Graffam Apothecary! So, here it is, breaking apart and folding flat:
I didn't bother going crazy and making the little dormer windows fold flat. I probably should have made them be solid - they'd be easier to assemble. I inserted a piece of cardstock the size of the base into the main part of the house, and that stabilizes it a *ton*. If this were two separate floors, that would be even better, and the floors would have floor plans on them!