Is a penthouse feasible for 350,000€?

The prices in the sanitary exhibition of the wholesalers are completely exaggerated moon prices. Take a look in a hardware store, then you'll see what the stuff really costs. And for so-called branded goods, just a look on the internet is enough.

I haven’t seen Gessi fittings in the hardware store yet. That the prices for sanitary products are generally exaggerated is nothing new. It’s the same with kitchens, only it’s not mentioned as often as bathroom equipment.
As I said, on the internet you have the statutory standard warranties including the reversal of the burden of proof after 6 months, and if the craftsman installs it, he is liable under warranty for 5 years. Everyone should be clear that this is factored into the price.