Floor plan 2 full floors KFW 55, 136 sqm flat roof

more than three contour lines (unknown spacing)

Oh yes... there was something else. I wanted to mention it too. But I got tied up ;)
What about the contour lines???

I think we will rather take sill windows to the east and west on the upper floor because of the neighbors.

Good idea :) But not too small. And also consider the south side!!! It is very important for energy yield. For you, the problem will be that you want many north-facing windows to the garden, but these are counterproductive for energy gain INSIDE the house.

Hm, then I have an 8-meter deep front garden facing north-south towards the street.

Yep. Where is the problem?
Have you ever searched garden or front garden on Pinterest?? ;)

Sounds like you would choose a completely different building volume of the house

and position it differently in the building envelope.

Let's say: the building volume wouldn't be mine, yes. And I would let more southern sun INTO the house according to my needs (hence my idea to include the south with the L-shape). Since I also have a house that one can walk around, I know that each side has its own advantages for specific garden uses, and I personally look for those. It was just a thought I let mature for an hour. Maybe if I sit at the drawing table or PC, it will turn out differently. Also because of the elevations. But overall, it would probably be quite appropriate here. But there is not only black or white.

Do you mean that you get a nicer garden that way?

Write down what you would do in the garden, including clothesline, bike cleaning, kitchen garden, garden lounger and play equipment... don't forget the terrace with outdoor seating, because if the weather plays along in summer, you live and eat outside. Usually when drawing (please take a sheet of paper and a pen) the realization comes that you need garden_areas_... in one you don’t want to look at all (compost, clothesline), the next you want to keep an eye on (play equipment). Etc.

That way I get an L-shaped garden and get south and west sun on the terrace.

Also.

I imagine a U-shaped garden is nowhere really usable

Nope.

or only a garden facing north would be shady for us. The house would shade a lot in spring and autumn.

Yes.

with ceiling-high custom cabinets for example or something like that...

Custom cabinets are expensive too. Very expensive. And you really don’t have a great area now where you can put several meters of cabinets.

I imagine it to be special if you can look through the windows at the end of the stairs direction daylight both from above and below, that is outside.

Yes, that has something. But with a laundry basket in your hand, you don’t see it anymore either. There are so many things that are nice (dream fireplace as room divider, 2-meter kitchen island, illuminated sauna, generous terrace roof). The great thing: what you only see as a snapshot in a catalog, you don’t miss later if you didn’t realize it. The view is less valuable than a house that works in daily routine without constantly searching for things, thus wasting valuable time.

Make garden templates for yourselves and draw and furnish with them... just to see if there is only one possibility for house positioning. And I will try too if I find time later today.

somehow it has to be done differently, with ceiling-high custom cabinets for example or something like that

Ceiling-high cabinets, that's easier said than done, but it also means ladders and you want/have to store things that are no pleasure to lift overhead. So you "gain" space that only offers limited usability. The more inconvenient it is to reach storage space, the more often it is used for things you need so rarely that throwing them away (or not even acquiring them in the first place) would be the more reasonable solution.

The view is worth less than a house that functions in everyday use without constantly rummaging around and thus wasting valuable time.

A good view is, from my perspective, priceless and certainly worth a daily detour. With the detour, I don’t lose time; I invest it in quality of life. For 2 years we have been living with a curved, partly very steep driveway over 100 meters long, which is only accessible from the street by a 270-degree hairpin turn, meaning a maneuvering process. This is really impractical and takes longer than simply driving in and out; some guests are afraid of the driveway and just park down on the street. Not one of us has regretted this for even a second in the past 2 years, because the view up in the house is so worth it. Not even in snow. Several times every day. Every person is simply different.

A member who can no longer log in here just pointed out to me that more than three contour lines (with unknown spacing) run through the building envelope here. I "don't see them transferred" onto the virtual Lego plate ;-)

The legend of the development plan says "Contour lines according to DGM with elevation in meters above NHN"
I did some googling but didn’t really get any wiser. I assume it’s not about 1 meter differences. If I’m looking correctly, there are 2 contour lines running through the building envelope.

A gable roof was originally also our first choice. However, we have to green the roof, as stated in the development plan due to drainage in the area. I once looked at greened gable roofs. It looks like the rain washes the substrate off the roof quite quickly, and visually we don’t like that at all.

Okay, I understand, although I know greened gable roofs from Norway. The idea only came up because of the space issue, since you can "hide" quite a lot in a gable roof, especially I have already read here about great ideas for children’s rooms with a second sleeping level, etc. Where a disadvantage can sometimes also be an advantage :D
I like your basic attitude towards the room program. If you want something, then you will like it and you will live with the "disadvantages"; beforehand just really take the criticism seriously and mentally go through it yourself.
Our floor plan was sometimes viewed negatively, which is nothing bad. I wasn’t quite sure about some points anyway; now that we live in it (still living there) I really like it, although I could live well in a thousand other floor plans too. We certainly didn’t invent the floor plan.
I couldn’t live well with the jack-of-all-trades, namely when all the "edges" and idiosyncrasies are sanded down so that they fit every situation. Today the problem is often that people want everything instead of happily living with the partial adversities of their own decision.
Best example: objects in "wood look" or "stone look," I don’t like compromises and live with the peculiarities of wood or stone. But I also notice this in other areas of life, like: expecting European food overseas, dogs that don’t bark, vegetables that are supposed to look/taste like meat... all that is not for me.
I believe you are following a good approach, but currently you are not too stuck on individual points, all of which you should let go of to achieve a TOP result INSIDE.
We absolutely wanted to see the little lake from the house and had rotated the house and much more for the best view, ideally not the view from the bathtub onto the lake... at some point it was only the lake in our heads, although it is just a nice but small pond. Fortunately, we managed to turn the corner and properly focused on the things that really matter for beautiful living and did not subordinate everything to the lake view :D

A good view is priceless from my perspective

yes! …but no no, it refers to the view during the stair run. In this case, into the neighborhood. And it is just the way it is: the best direct view is useless when next to the window the week’s ironing is stacked due to lack of space. Then there’s no enjoying the view :cool: