Sloped plot, single-family house 50m², slope, garage optimization

It is certain that we are building with a basement. Aren't the opinions about basements rather subjective? Some say you need one (those who have one), others say you don’t (those who don’t),

And I say: having a basement doesn't make financial sense as a simple yes or no, but depends on the height difference within the house footprint. In other words, I bring this to the objective level of discussion: if you build it without needing it, building it costs unnecessarily; if you don’t build it despite needing it, you practically pay just as much for the replacement measures as if you had built it. My short formula is: for every 20 cm of height difference, you pay 10% of the basement price — both for the built basement (with the gained storage space in return) and for the unbuilt basement substituted by terrain modelling and stabilization. In your case (100 cm height difference = 50% basement cost), I see the factual "truth" exactly in the middle between "basement yes" and "basement no," and consequently your attitude toward it alone gives the decisive factor. For a height difference of 60 cm, I would objectively see a clear tendency toward "no," and for a height difference of 140 cm, objectively a clear tendency toward "yes" — each time even against a subjectively opposing opinion.

How many parking spaces do you have to provide and how many do you actually need? Does it have to be a garage, or is a carport also acceptable?

The contour lines are really hard to make out, many details were missing, are very vague, or not included at all in the budget. Such things greatly weaken the response in the forum. Besides, you have a pretty difficult plot of land. Usually the rule is: the more complicated the plot, the more likely it needs an experienced architect. I wouldn't trust the draftsman of a general contractor here.

If it were mine, I would join Yvonne and build a basement. Find a professional who knows what they’re doing.

How many parking spaces do you have to prove and how many do you actually need? Does it have to be a garage, or is a carport also possible? The contour lines are really hard to see, many details were missing, are very vague or not included at all in the budget. Such things strongly weaken the forum's response. Besides, you have a pretty difficult plot. Usually it applies: the more complicated the plot, the more you need an experienced architect. I would not trust the draftsman of a general contractor here. If it were mine, I would join Yvonne and build a basement. Find a professional who knows what they're doing.

I oriented myself on the questionnaire. Sorry that some information is missing. I tried to make up for that with the pictures and sketches. Two parking spaces must be proven. Garage or carport are possible. Assuming you build with a basement and part of the space in the basement is used for technology and a multipurpose room. I am missing living space compared to 1.5, right? Actually, the ground floor should be used as a bedroom later if stairs become difficult. That's why it was planned that way. I imagine it is difficult or even inconvenient to have the entrance on the ground floor and then always have to go down to the basement, for example after shopping. We will hand it over to professionals again. The hallway is not very well received. How do you think it could be better?

The contour lines are really hard to see,

The house symbol in the development plan ranges from an elevation of about 290.5 on the valley side (left side of the plan) to about 291.5 on the mountain side (street on the right side of the plan).

Also, you have a pretty difficult plot of land.

It's okay. If the tree on the (curved) corner is a planned tree, I would still request its relocation. Otherwise, it is a moderate sloped plot at a corner or bend of a street and near a presumably two to three decade-old turning area until the development area is extended into the adjacent field. So later, it will probably be at the entrance of the street – shifted similarly as with – and for some time, the garbage truck will first have to turn there.

The contour lines are really hard to recognize, many details were missing, are very vague or not included at all in the budget. Such things strongly weaken the response in the forum.

It would always be nice if someone would label a site plan accordingly with measurements of the side lengths etc., and not hide this somewhere in the thread in walls of text, and then talk about dead-end streets etc. where a clear, north-oriented drawing with dimensions and contour lines can say it all. Ideally, floor plans should also at least have a north arrow.

Otherwise, it is a mediocre hillside plot at a corner or bend of a street and near a turning circle that has presumably existed for about two to three decades,

In my opinion, the difficulty mainly arises from the narrow width at the street. Added to this is the moderate slope, which is neither fish nor fowl. The placement of the parking spaces should be clarified first before discussing floor plans.