Decision support for different floor plans

for the building application, they have to be official places, not on the lawn

How kind of you to tell me that. But I've been doing this for a while, so I know the differences ;)

I am now more convinced to move the house towards the street,

I would do that too. However, if you have 6 meters to the east, it could be a bit problematic with turning the cars including conventional carport supports.

In that case, we would then have a south/east garden,

I would rather say that from the view out of the house you then get more wide-angle view also to the left (SE) into the garden ;) But wait and see: every orientation has something to add value to a garden. In terribly hot weather, you will sit on a bench on the north side in front of the front door and enjoy yourself there :D You can never have enough relaxed seating areas, and they enhance a garden.

I would do that too. However, if you have 6 meters to the east, turning the cars including conventional carport supports might be a bit problematic.

I would rather say that from the view out of the house you then get a wider angle view also to the left (SE) into the garden ;)
But wait and see: every orientation has something to add value to a garden. In terribly hot weather, you will be sitting on a bench on the north side in front of the front door and enjoying yourselves there :D Cozy seating areas can never be enough and enhance a garden.

I would move the house in the north as close to the neighbor as possible (I believe 2.5m minimum distance), that is enough for a walkway to the door.
In the west, there would then be space for a driveway/parking space, certainly something more than 2.5m but only what is minimally necessary to comfortably park the car and do some maneuvering. Are there any tips here on how to best plan something like this, i.e., how much space does a car need to "park and unpark"? Is it better to plan the parking spot aligned with the driveway (west→east) or to park around the corner (car orientation = north→south)?

In this constellation, the garden would be used to the maximum in the south and as much as possible in the east despite the parking space. In the west, besides the parking space and the outdoor unit of the heat pump, I don’t see much garden left.

On the west side there would then be space for an entrance/parking space, certainly a bit more than 2.5m but only what is at least necessary to park the car comfortably and be able to maneuver a bit.

And if you are stingy with the space, it simply won’t work. For one thing, having some courtyard space is not only important for maneuvering but also to let a guest park, repair the bike, or let the child/children play on wheels sometimes. The ratio of courtyard/garden should be somewhat right. Besides, then the carport stands right in front of the living room window and takes away the western sun from the house. (Reminds me of a discussion here where the lady wanted a 3sqm utility room so that the living room could be 55 instead of 52sqm, but then wanted to dry laundry in the living room).

Are there any tips here on how to best plan something like this, meaning how much space a car needs to "park and unpark"?

Try it yourself! One drives around in the Edeka parking lot on the weekend, the partner traces it with chalk. Also report having backed up over 25 meters before ;) (ok, you weren’t the one with the discussion about the maneuvering area. Because that was recently discussed on a nearly similar plot)

Are there any tips here on how to best plan something like this, i.e., how much space a car needs to "park and unparking"?

There are recommendations for this, for example the following With a 4m carport, you can certainly go under 5m, but with 2.50m you won’t make it. Don’t forget the posts of the carport, also possibly entrance platforms or the gravel strip around the house should be included in the planning. Otherwise, every architect should be able to draw the turning curve of a car. I would plan the turning area so that it can also be used as a guest parking space. I assume you only need to provide one parking space? And where did you want to store bicycles?

ok, it wasn’t you with the discussion about the shunting track. Because this was discussed recently on a nearly identical plot)

So, I found the thread: https://www.hausbau-forum.de/threads/kleines-grundstueck-kleine-einfahrt-benoetigter-platz-zum-wenden.46117/