Floor plan single-family house 190m2 with basement. Feedback?

From my own experience, your budget for the outdoor facilities is not enough. At least not if you want to work with walls and not slope the ground. I would estimate that at 70-100k for outdoor facilities + incidental construction costs + garage/carport. Have the shell builder/civil engineer and/or landscape gardener make you an offer for the retaining walls including terrain leveling. These are enormous costs that almost everyone underestimates.

Text deleted, I am with Katja.

Whether you now add a lot of money or build a balcony does not change the poor and artificial garden access.

If I look at the cost estimate of our outdoor area, what we have paid so far or the hours worked, what friends have paid, and what surprises such a slope offers, your solution costs 100k. Only earthworks and retaining.

Soil (which one is it anyway? Probably not good topsoil) is enough for the garden and maybe for 90 cm height.

And I would also not pay for such an expensive basement + enormous costs for land adjustments but build with the slope. Only 2 floors and use the lower one as a living floor.

The construction companies of course each offer the planning. After we brought the floor plan, they initially had minor comments which we then incorporated. Afterwards, they primarily adopted what we had proposed and no longer provided any useful suggestions.

That is exactly where the mistake lies. Never present a floor plan, but only specify your wishes in detail and then let the planner be creative.

The initial proposal with the retaining walls comes from one of the three construction companies. Do you have a suggestion on how the site can be incorporated into the planning?

A competent planner/architect will tell you that.

I'm with the others on this. That way you easily pay over 100k without any added value for walls and adjusting the building to the property. You have to do it the other way around. Adapt the building to the property. That's why in the basement you have your living spaces with large windows facing the garden, and on the ground floor from the street side, then the bedrooms. Take a look at the thread by kati1337 titled [Hanghaus in der Südwestpfalz]. There you'll get a feel for how to build nicely on a slope. That way you save money and don't sink a six-figure amount into the exterior facilities.