Regarding the mono-pitched roof you did not understand my questions correctly. It was about how a shed roof should be designed. But that is not so crucial. Knowing whether a half-hipped roof is permitted would be more important. Below is a house that roughly corresponds to my idea.
You were very much understood 1a tiptop correctly and the explanation was exhaustive enough and correct so that I needed to add nothing to it. The house in your example picture is clearly neither a mono-pitched roof house (which literally means exactly the same as the word), nor would it have a shed roof. Even if you were to, for example, extend the half-hipped roof almost like a mono-pitched roof house over a carport
would (subjunctive - I don’t even know if Kohl was already chancellor when that was once in fashion), I still would not derive an assessment as a mono-pitched roof house from that. A mono-pitched roof house is a down-to-earth pointed roof, like a two-person tent for giants and with tiles instead of fabric. This only exists very rarely; I have almost only ever seen it in practice in holiday homes, and only in the N3 broadcast area.
The real estate agent told me that the official access to this property must be from the private road. That is exactly the reason why this clause confuses me so much.
The development plan also applies to properties that do not have this indirect access like yours. In your case, the "clause" is simply irrelevant, as it does not apply.