I'm running out of time (need to play using this map soon), so this probably won't be as "done" as I'd like it. It's also a bit of a hodge-podge of styles, since I'm grabbing what I can. I'm also starting to hit Illustrator CS5's 32-bit memory limits, which is sort of demoralizing.

I've been figuring that this entire house was probably built using a bunch of wall of stone spells over an extended period. Since this spell automatically merges new castings into old, the whole building would be seamless and probably gives the appearance of being carved out single huge block of rock.

The final form of this map will be in a PDF, the map divided up into pages for printing. It will probably not look exactly like this, but I don't think I'll have the time to push it much further. Here is the latest ground floor: