Bluntly closing doors - left or right stop!?

We also have very good doors

But as mentioned above, what use are flush doors if the door opens into a room. Then you can see the frame on the outside.

There is a system behind it: look at the door from the side it opens towards (classically from "inside" the room). The side where the hinges are located is the side after which the door is named.

Great, thank you very much! Now a lot becomes clear to me!

We also have very good doors

Isn't there a comma missing between "doors" and "have"?

I assume you mean that you also have the Astra doors from Grauthoff and are satisfied with them? That would already be good, then I chose the right doors.

How much does such a door cost?

Depending on the material, height, fittings, door handles, hinges, etc., from 2,000 EUR upwards. I have also seen some for 3,500 EUR each... It can always get more expensive.

Flush-closing doors are not rarely also room-high, then it gets expensive. And if you do it consistently and choose flush doors, you also have to look for a different solution than baseboards. Otherwise, it looks odd.

Depending on the material, height, equipment, door handles, hinges, etc., from 2,000 EUR upwards. I have also seen some for 3,500 EUR each... It can always get more expensive.

We are still talking about interior doors, right?!

So from an offer: Door 248.5 x 86 cm, white lacquer, inward opening, etc. => 1,600 EUR matching frame included 750 EUR => total price 2,350 EUR per piece. This is already one of the cheapest offers. But maybe it can be cheaper if you save on the material or choose the door with only 2.10 height, so I have estimated from 2,000 EUR.