When is a slope a slope? Basement vs. slab

We were offered a so-called hillside house for a similar plot. From the street, it has 2 full floors, with the upper floor leading level to the garden at the back and the rear wall of the basement disappearing into the ascending slope. On our plot, the slope rises about 180 cm over 10 m depth within the building area and a total of 7 m over 44 m depth. By the way, the direct neighbor has built there with a slab foundation and started the slope. We would then only have to start the slope on the right and left sides of the house, each 3 m wide.

However, we have not yet purchased the plot and are now waiting for the house calculation.

Intercept, don't start. Stupid autocorrect

We paid an extra 80,000 euros for approximately 10x10 [Wohnkeller].

60k to 80k since you have earthworks anyway

Bo, regarding your question. Yes, the approximately 8% is correct. The additional costs were well estimated by the BU beforehand; it was no surprise. Since we ordered a turnkey house, everything from a single source, without an architect and so on, I don't know the exact price of the foundation slab. It is also not a foundation slab in the classic sense. In SH, strip foundations are common for smaller houses, 80 into the ground. Between them, 40 cm of concrete is then poured on recycled concrete and compacted fill sand. Steel mesh or bars are embedded in the concrete and in the strips. That is sufficient.

My tip, if I look at my payment schedule, is that the BU values my foundation slab at 16,500 plus 6,500, which gives 23,000 gross. That is never a basement. So, if you can get a flatter plot of land, that saves an enormous amount. You can distribute countless luxury garden houses in the countryside for that. Karsten

By the way, the direct neighbor built with a slab foundation and started on the slope.

Catch, not start. Stupid autocorrect

One really shouldn't even start with this catching thing
Anyone who sleeps peacefully in such a slab-on-half-berm house has never seen a landslide ruin. Apart from, firstly, the costly Pyrrhic victory of this "avoidance of a basement," it also becomes complicated secondly if you want/need the driveway on the valley side. Not to mention the "beautiful" appearance.

A path like the centering described by Karsten requires the grace of Holstein "slope dimensions." That cannot be scaled arbitrarily steep.