Hi Vargas -- Welcome to the forums. I just looked up Payerbach on Google Earth. Unfortunately the resolution for your area is extremely poor. It is as bad as I've seen anywhere on Google Earth.
If you want to model a local building accurately and you need plans then approaching the building owner is likely the best and most appropriate way. If they have plans and you ask nicely and seem trustworthy they might lend them to you. In general floor plans are not publicly available. On the internet you might be able to track down plans & elevations of only the most famous of buildings -- and very few are available. The ones online only tend to those buildings that have academic interest. (When I watch the tv show '24' I always get a kick out of seeing how Cloe can call up to her computer the floor plans of any building! I really doubt any government database has that information. They never came to measure my house!).
Regards, Ross

Here's why I like Oscar:




