IANAL but it seems to be that the layout of a particular existing building is factual information and therefore cannot be copyrighted, just like the location of

IANAL but it seems to be that the layout of a particular existing building is factual information and therefore cannot be copyrighted, just like the location of streets cannot be copyrighted. I guess it's slightly more hairy because architecture is considered to be artistic as well as functional, whereas street layouts are generally only considered to be functional, but I still think that would stand.