[Spark910]

Thinking of my own actual house, it seems small from the outside but is actually quite big (granted I'm not looking at it from the same point of view as in Graal), but in light of the fact buildings generally can be deceptive as to space and size I don't think it's a huge issue to require 1:1 at least.

I remember Haunter (?) trying this on Rudora and ensuring that at least a house that had two levels on the outside had two on the inside as well - this sort of realism is perhaps better and a general awareness of not having a tiny outside and huge inside, but I think 1:1 could result in some less than attractive levels unless house sizes as a whole were made small as standard, as large outsides aren't too nice.