Single-family house 175 sqm without basement, too big?

Attached are the images with semi-transparency so that the original terrain line can be seen. I would have liked to edit my contribution, but somehow that doesn't work

@11ant please don’t be as mean as you were to Shiny, I’m also more understanding, I promise!!

I was even much less mean than in San Francisco in torn jeans, and definitely not three times as mean to Shiny86, I simply can’t do that! I just had to pull the ripcord in terms of helpfulness to avoid crashing into futility. One more week, and Gisela would have had to give me the Doornkaat in an infusion bag. Sad, but after almost eight hundred posts and still no radio contact with the tower of the destination airport, you also have to realize that a Princess Perfectline had her chance and didn’t take it. That’s how it is. Tel Aviv, as the French say.

Two variants, one stepped and one sloping.

By the stepping I generally meant any transformation of the terrain profile (or sections of it) into rice terraces, not specifically the sloping in literally taken steps. But nice that you visualized it – now you just have to sleep on it and then look at it again from a distance. When you then roughly calculate the masses to be moved in your mind, you will realize that they far exceed the volume of what you want to avoid with it. Even without work – so just the material alone – that already weighs more expensively. Pyrrhus – the humanists will remember – had his Waterloo just under 21 centuries before Napoleon. No remix needed of that, by the way, says Gisela too.

How do you get from the street to the garage?

Does the [B‘Plan] allow this earth movement?

I think I would build more with the slope.

I would really like a split-level here, especially with your situation with a teenager.

Do I understand correctly that your criticism mainly concerns the stepped version? How do you assess the other version?

The carport will be located 4 to 5 meters away from the driveway. I hope that this will manage to balance the "slanted" street with the "straight" parking space. The development plan allows that, yes. The restriction that currently officially applies, but will probably still be changed: retention walls at the boundary max. 1m high, within the property max. 1.5m high. I will look at some split-level houses, but I can't really imagine it... The cars should be parked on top because they don't take away any "valuable" garden space in the northeast. However, the living area should be downstairs so that you can access the southwest terrace from there. Emotionally, this contradicts itself somehow for me, but I will inform myself!

We have 1.2 m over just more than 8 m height difference, which is borderline steep.
In addition, in case of extreme rain/storm/heavy rain, water might run from the street towards the house.
You need to look into drainage for that. I would work with 2 drainage channels.

I imagine a split level roughly like this:
Ground floor entrance cloakroom WC utility room
Half a floor down open space
From the ground floor half a floor up parents’ area
Half a floor further up (above the entrance) son’s area

Independent of that, I would design the property with terraces on different levels
E.g. terrace for eating/grilling
Next level lawn for badminton, pool
Next level vegetable garden
I understand that you want levels, but you have a huge amount of soil. Every bucket of excavator costs. Your 45k is not enough.
You can use the wall area and set up quasi raised beds there. Very comfortable to work with
Creating different levels creates spaces.

Does the development plan allow this earth movement?

This mostly justified concern would of course be in addition to the economic feasibility consideration.

I would really like a split level here.

However, the commendably clear design would undergo a significant modification, so I tend to ...

I think I would build more with the slope.

... implement the "building with the property" as far as possible solely at the level of terrain adjustment. However, this would require a more detailed elevation point map of the property.

How do you assess the other variant?

Less unrealistic, but also inefficient.

The development plan allows this, yes.

It usually only mentions those restrictions in such matters that go beyond the scope of the state building code. I rather doubt that one can dig here like at a puppet fair pogo. And is right, every excavator bucket is thrown a bag of money after it.