Floor plan optimization of a single-family house with a basement on a small plot

And I have to say the first months after moving in were tough. So many bills came gradually, or purchases. Lawn mower, rake, etc. We had already doubted our planning.

It was similar for us. Money gone and suddenly you have a garden but no mailbox anymore.

Hmm.... I just read the last posts and took @Escrodas's suggestion to heart.

That wouldn't be for me. I'd rather build over the parking space.

A south-facing garden is also something nice, especially in winter... for the sundowner one could plan a second terrace between the shed and the house... Yes, that way it could become an affordable property

Two terraces on 360m² will be pretty tight.

2 terraces on 360m² is already very tight.

For the sundowner, it doesn't even need to be paved yet.

Sorry, I didn’t want to rate the thread, especially not just with a 2...

I have not seriously paid attention in more than two and a half years whether and how often that might have happened to me before, nor to how certain threads were rated. I only look at the topic in the overview by the headline, and if applicable, the teaser text. I almost always look at basic topics, financing topics practically never - even if they had seven stars. My impression is: this is an inclusive function of the forum software that is useless but also doesn’t cost anything, and is therefore tolerated in its mouse hole.

The green strip is officially a different parcel, that is on the list to inquire about with the seller. There is like a small kind of embankment/ditch that runs along the whole residential area; I can’t really imagine that it properly belongs to us... but that will be clarified.

That sounds like an owner who wants to fully develop the property including the access road first and then, after selling the building plots, hand over the streets (and green strips). This implies the advice to ask whether he intends to transfer the street to the municipality or if it should become a private road. I believe the latter less because the plan looks as if the planning area continuously adjoins an existing municipal road - but if not, that would entail certain potential problems: private access roads have indeed already been sold to third parties, you can definitely find that on YouTube as “madness of the week” from NDR extra3.

Would an alternative be to use the excavation [...] to partially raise the terrain (they are anyway below street level so the basement would basically have to be buried less deep and there would be more space at the back, basically an artificial mini-slope)?

Schilda as the new venue of the Hornberg shooting? - that would be a new Woodstock for fans of the Hartenholm race Werner versus Holgi.

No, unfortunately not quite, since the plot will still be divided in the middle [...] there will presumably also be a 3 m setback area in the new development plan.

You probably misunderstand the drawing: the blue building zone is often drawn continuously without differentiating between single-family and semi-detached house plots. The lateral building setback arises from the state building code, and garages and carports are regularly privileged to be located there. On the contrary: there are even often additional (often red bordered "Ga") areas for them, where they stand outside of the main building zones.

You probably misunderstood the drawing

Ah okay, the woman from the development office just told us that there will probably be a building boundary with the new edition of the development plan. Good point to ask about!

That would basically be good for us in principle

But I see your collective essence - thoroughly weighing the basement given our circumstances

Given the plot size, I would definitely plan with a basement. The prerequisite is that the soil report is suitable.
I would plan the basement as a living space basement and if a third child is on the way, I would move a children's room or the bedroom to the basement (until the first child moves out). Additionally, a guest room in the basement and the workshop + the laundry room. This way you can make your living/dining room significantly larger and also have more of the plot.

Ah okay, the woman from the development office just told us that there will probably be a building limit included in the new version of the development plan.

That would be highly unusual. Individual plot building windows are actually only made where the houses are supposed to be arranged staggered; otherwise, the standard case is that the building window representation in the plan drawing always extends beyond the property boundary. You probably are not allowed to place your house on this boundary yet, but you may place the carport or garage, provided they have no living rooms, do not exceed 3m average wall height above the original terrain, and so on.

With the size of the plot, I would definitely plan with a basement.

If one is so fond of stuff that will finally end up in the bulky waste in ten years because one never managed to sell it, that one wants and can give it rooms. Then, yes then you are absolutely right that here it would only have space under and not next to the ground floor. But the alternative "attic" is left open by the height limits here and is fully sufficient for this purpose.