Basement or slab? - Cost estimation

No, I do not see even a slight tilt there. I also see more like two than just one and a half meters in the building window, and according to my cellar rule clearly a cellar - but not with an integrated double garage. When I look at the driveway situation, two single garages seem quite clearly and, as Frau Bundeskanzlerin would say, "without alternative" to impose themselves on me, namely in the building niches on the right side of the plan (northwest?) and at the top of the plan (southwest?), which are at driveway level (so probably somewhat above the cellar floor).

Bebauungsplan gibt max Firsthöhe von 11m vor.

On the mountain side, valley side or from a fixed reference height?
The quality of my advice regularly decreases exponentially with the "size" of the building plan excerpts

Würde zur Bodenplatte greifen. Aber Keller ist auch nicht schlecht.

I would be doing you a great disservice if I suspected a relation to the other newbie with the "expertise"?

Am I correct in assuming, by the way, that we are still talking about the same property as in and ?

No, I don’t see even a slight slope there. I actually see more like two rather than one and a half meters in the building window, and according to my cellar rule definitely a cellar – but not with an integrated double garage. When I look at the driveway situation, two single garages seem quite clearly and, as Frau Bundeskanzlerin would say, "without alternative" to be imposed on me, namely on the building boundary to the right in the plan (northwest?) and at the top of the plan (southwest?), which are at driveway level (so probably somewhat above the cellar floor).

Upslope side, downslope side or from a fixed reference height?
The quality of my advice regularly decreases exponentially with the "size" of the building plan sections

Would I be very wrong to suspect a relation to the other newbie with the "expertise"?

Sorry, I forgot to write that: downslope side 11m.

I actually already had the “fear” that the cellar will end up costing us more than the offer we received.
Therefore, I would almost say the thing is out of the planning.

Then we’d rather go for a single garage or a carport with an adjacent storage room. We don’t need more.

We are currently calculating costs for earthworks (excavating, disposal, possibly refilling) at about 35-40k. Is that realistic?

PS. Yes, same plot.

From that perspective, I would almost say the thing is out of the planning.

My basement rule sees it differently; it is known (very briefly put) as: "with a two-meter height difference in the build window, an unbuilt basement practically costs the same as a built one and simply offers no return for these costs."

Even though I can understand the rule, ant11, if I look at the offer from superzapp, for example, I can hardly imagine that we will end up at 120t with the floor slab despite the height difference...

Sorry, but the rule is just brutal – and I only formulated it, reality established it. Like all general rules, it is not precisely accurate, but essentially it is – assuming regular circumstances, which I do not exclude here. You can forget about the base slab here: to "even out" a two-meter height difference, you would still have to raise the street side by one meter and dig in the garden side by one meter – and nobody really wants that, but even "just that much" earthmoving costs (including material, because you can't just reuse your excavation 1:1). Besides that, you don't even have the space to grade "just that one meter" between the property boundary and the building envelope (and to drain it). Forget the wish to have a choice here, your property has already filled out the order form for the basement.