Plot selection - south slope with access from the north

Here’s a thought.
There could be 10 plots created.

About 15 or 20 years ago there was actually an inquiry from the municipality asking if the entire meadow would be sold (in the 90s the meadow also included house numbers 15, 17, and 19 – those 3 parcels were sold off). However, my grandfather declined and did not sell.
The plan back then is very similar to your suggestion, except that the street you drew in blue goes back up and runs basically between #1 and #2.
At some point, the resident of house number 17 received a parcel due to friendship between him and my grandfather, which is why the plot was separated again.

Since there have been some cases in our community/village in recent years where 'agricultural land' was converted into building land for individual plots.

The problem is: "the recent years" were probably still in the Mutti era, and since then, under Olaf's troupe of comedians, some winds have also turned with effects on the municipal level.

exactly, and the OP there hopes that in the fourth quarter it will finally be possible to build on the plot. From the first approach by the community to the legally valid development plan, it would have been about 3.5 years (assuming everything goes smoothly now).

I am glad to read that, good luck for the further process! If I remember correctly, it was also the case that an initiative at the municipal level—which was then initially rescinded at a higher level—was at least launched during a phase of eased building land designations. Therefore, I see the situation of the OP here as even somewhat more complicated.

If I remember correctly, it was also the case that an initiative at the municipal level - which was then, however, initially revoked at a higher level - was at least launched during a phase of eased land development designations. I therefore see the situation of the local OP as somewhat more complicated.

That's true. Currently, however, we are (unfortunately) in the normal procedure. So including an environmental impact assessment, etc. That then takes its time and costs a bit more. But if the landowner is willing to cover the costs, it really shouldn't make a difference to the municipality.

Phew ... do you have a rough estimate regarding costs (just a rough calculation example)?

'The last years' means active in the last case known to me from 2 years ago: the older brother of a former classmate bought a meadow plot from the church and built there. He told me a few weeks ago it was not building land; purchase, ancillary purchase, and development costs were in the end approximately equivalent to new development area prices. But that doesn’t sound like a development plan or an environmental impact assessment etc. were carried out.

But if the landowner is willing to cover the costs, it actually shouldn't make any difference to the municipality.

Okay, then homework : secure willingness to sell and building interested parties for all ten plots! The sellers must be ready as soon as possible, and the prospective builders must have patience for several more years.

Just call the municipality and ask what is possible and what the options are to be allowed to build there. It also varies from municipality to municipality. Such an inquiry does not have to have detailed plans or anything like that yet. The first step is to check whether the municipality is even willing to approve a potential project.