Placement on the property

I don't know what you measured now...

That's something to work with already: You can build just under 190... Basically for the terrace and house including overhang. I don't assume a 50% exceedance/second floor area ratio with a 0.4, so the floor area ratio must also serve for outbuildings and driveway/paths. But even without the prescribed floor area ratio, u500 is roughly comparable to a (small) family bungalow like a corpulent large man squeezing into size L. That quickly leads to lack of space and problems... Storage space for garden tools and children’s vehicles, children’s play area, car, distance to neighbors. I would also expect that the neighbors will fully utilize the height because that is the most reasonable thing on this area. So if a ridge height of 7.80, 8.80 or similar is allowed for you, many will go for the city villa version - an unreasonable and even more expensive bungalow virtually sinks between the neighbors... I wouldn’t want that for myself. Regarding your question: you don’t have many options after all, since a driveway also takes up a lot of space. There is not much to be done with 18 meters width either. Don’t get me wrong: handy plot, affordable, but you don’t have to pretend all paths are open. Try to get out of tunnel vision. This is not a reproach but advice :)

Also, it would be helpful if you add a legend to the drawing from #11. Apparently some explanation is needed there.

Putting a single-story house on the plot is a small challenge, unusual - but possible and not fundamentally bad. Facing the fields instead of the residential area also has something going for it. Everything is fine so far.

I would place a parking space or carport as close as possible to the street boundary and the neighbor’s boundary. Depending on the building regulations, you may need to provide an additional parking space – it’s best to inquire about this. Are there other vehicles (bicycle, pedal car, scooter...)? They also need street-accessible storage and usually get in the way inside the house. Just a thought.

The lighting issue is a challenge with this location if you want your rooms to be bright. The north-facing orientation basically makes it darker. With a bungalow, you can work very well with daylight from above – of course, like all special features, this comes with additional costs.

Since you will presumably be living in the house with your family yourself, it makes sense to consider the typical and preferred daily routines and schedules. With children, it’s sensible to keep in mind that they will eventually become teenagers – who have different demands and pose different challenges. Many parameters for the layout and positioning on the plot arise from these considerations.

One often considered parameter is spending time in the garden in summer – do you like sitting together? Sun or shade? How many people? Also relaxing? Do you need exactly one universal place, usually called "THE terrace," or do you set up several places?

Another parameter is how to deal with storage space. Do you have a lot or little "stuff," room-intensive hobbies? Depending on how many things you want to live with, you need more or less storage space that is more or less accessible. For some, this is also the reason to prefer a garage over a carport – it is, in addition to vehicle storage, a comparatively inexpensive locked storage space.

Don’t think in individual problems but start with the requirements – as you have partly already considered. Then you can think in solutions. It’s more fun that way.

In the west, however, you only have the 3 m minimum distance to the property boundary,... and your neighbor will probably only have this distance as well. It will get tight with the western sun.