Wonderful technique. It looks really good, what did you use as your ceiling material?
If I may approach nit picking

I don't know for sure, but depending on where and when you are modeling some buildings may not have had electrical wiring running through ceiling joists. Depending on time and location the wiring would have been along the walls and ceiling. Don't forget the chandelier that the wireing went to.
Things to plan on - wall coverings, glass debris, fill the gap between the stairs and the outside wall. Heres a supper detail thought - add straps to the drain pipe on the front wall to hold it to the wall, use some foil cut to side and glued in place.
My RMG dio is going to be a destroyed building and your great detail is help to me.
