Basement or garage, or basement with integrated garage

Hello,

my wife and I are currently in the final planning stage of our house.
We are asking ourselves what would be financially most sensible for us.

We will be building a house approximately 9.5m by 11m. (Ground floor approx. 85sqm)

We are solely still facing the question of how to approach the topic of basement, garage, or basement with integrated garage. A "small" slope is present -> approx. 2m height difference from the beginning to the end of the property.

1. Is it cheaper for us to build a basement if we might have to set foundations (because of the slope)?
2. Is a double garage with a roof structure ultimately just as expensive?
3. Does it make sense to integrate the garage in the basement? It does not have to be a double parking space.

For the decision with a separate double garage, we would probably need about 170sqm of foundation slab.

This decision is the last one we now slowly have to make. Can someone help me here who was just as clueless about this topic?

What does the architect say on the subject? How does the house need to be founded? Think about whether you like a basement garage visually. I only know the ones with an extremely steep driveway (where the street level is higher than the end of the property) and there a lowered car or two is then parked outside. I don’t know which way it is with you.

That the question is even being asked, I interpret as "entrance-side street on the higher side" (?) - from that it would follow: either there is also a street at the bottom from which you can access the garage at ground level, or you would drive into it from above into the courtyard "plummeting down". In the first case, I would find the idea okay, in the second not.

I consider the slope or incline relative to the house depth instead of the plot depth to be decisive. From about 80 cm height difference front/back, I am of the opinion that (considering the otherwise above-ground additional space needed) it leans in favor of a basement, and you would have to be quite drunk to omit it.

However, many basements are hardly "used": what is not for heating and oil tank is the rest, which is called a "hobby basement". Whether a stamp collector really needs 20 sqm just for the hobby, I mark with a question mark.

The "entrance-side street" is on the lower side. and then it goes up about 1.5 - 2 m. I just wonder if I have to build so many foundations and supports because of the slope to make the house stable, that I should/must build a basement right away. I also prefer the option of a basement, but I just don't know what the financial differences are between "basement or converted garage".

For such a decision, other factors also play a role, for example the orientation and shape of the plot. If, for example, the plot is long and there is a desirable location at the front by the street (not exactly north), then it makes sense not to build a basement but a lower ground floor, with a ground floor and roof above it, so that the entrance and living area are in the lower ground floor, and the bedrooms are on the ground floor. The garage can then also be placed outside. Therefore, no "standard" statement can be made here unless it is also known how much money is budgeted for the house or how much space the room layout basically requires.

The deeper you have to dig a foundation, the more "basement" practically just means adding a floor between the foundations - to put it very simply.

And if a street-level floor is partially buried at the back, it does somewhat restrict its residential use - one would probably prefer a light well rather than a view. If you then build a (full) basement, a garage is already a relatively sensible use - whereas the "entry and exit quality" for a daily use car weighs differently than for the parking spot of the summer Sunday car.

And it depends on the individual case to what extent you perceive an underground entrance as a delivery entrance and prefer to go via the front garden and stairs to a classic main residential floor entrance.

I like to pose the basement question from the perspective of whether, in an individual case, it is a large appendix or whether it is filled with a lot of meaning. Only as invisible decoration, it is obviously nonsense.