Good evening,
As already mentioned, we are quite "blond" in this field.
Then I would like to give your blond face a little push by asking you the following question: would you – as an entrepreneur – sell a piece of land (a piece of land over which you can control and which, ideally, is in a desirable location) to a buyer who only yields you a small margin (closed shell construction) or rather to a buyer who guarantees you the best possible turnover (in terms of your subsidiaries and possibly downstream commission)?
So please bear with me if my ideas seem a bit naive or misleading.
I admit that I have difficulty making friends with this kind of "apology," since it usually comes with a grain of cunning. Because if it were otherwise, I would always assume a thinking person is seeking information before "naive" assumptions about unknown worlds see the light of day (in this case, the light of the forum).
The developer sells land and prefabricated house in solid construction together.
The finished product is only a prefabricated house if it is built with prefabricated wall elements. If, on the other hand, you obtain the "finished" service from the hand of a solid house builder, it remains a solidly constructed single-family house.
What would be important for me to know is whether I get the necessary documents (execution plans, for example) so that I can see where which connections are in the house, in order to seamlessly connect my own planning to them.
Only for the contractually owed service "shell construction" (if the developer even agrees to this; which I personally would doubt). For the interior finishing, you then have to commission another architect with the service "execution plans."
In any case, I will discuss the pros and cons of my project with an architect, maybe after that I will already be "cured."
If the land you desire is not exactly in the middle of nowhere or requires a clever architect from the start for planning reasons – or alternatively the developer urgently needs money – your cure should find you at the moment you inform the developer about your plans.
... to get my "special" wishes within a viable cost framework.
What would those be?
Rhine greetings