Garage position on the property - decision aid

The east/west orientation is approximately +/- 0°.
The plot slopes very slightly in this direction:

What do you mean by very slightly? Please provide the elevations of the corner points. If the plot has not yet been surveyed, the Geoportal can also help.

What do you understand by very slight? Please give the heights of the corner points. If the plot has not yet been surveyed, the Geoportal can also help.

Thanks for the tip about the Geoportal :). Top left 352.7 m and then it climbs up to 353.3 m at the bottom right = 0.6 m difference over the diagonal length of 30 m.

Top left 352.7 m and then climbs up to the bottom right at 353.3 m = 0.6 m difference over the diagonal length of 30 m.

So linearly skewed? - the diagonal should actually be about 39 m, so these are not quite the corner points (?)

So linear skewed? - the diagonal should actually be about 39m, so these are not quite the corner points (?)

I measured into the field as follows to determine a house number, with the line length given as additional information. Nothing has been surveyed yet, and the plot size is still partly with the municipality.

The property slopes "slightly" toward the upper left corner

Nothing has been surveyed yet, and the plot size is still partly with the municipality.

How do you even "know" the "key data" that "define" the plot so far? – I have never seen such a plot before: even parcels not yet finally surveyed do not have such an exactly square and right-angled shape in practice, and even the most utopian planned streets have some curve, usually following contour lines. Is an old airfield taxiway actually being parceled here, or are we ultimately dealing with a nearly rhomboid plot of roughly 800 sqm? I have never seen such "stem cell-like" plots issued even from the most theoretically adventurous land consolidation procedures. Normally, there is always something skewed, with a nonagonal curve or the like. If there is possibly even an above-ground development, almost all heights change significantly as well.

60 cm on the property is not a slope.

Maybe you can answer the question from post #4.

"Are there photos of the situation? I really can't imagine such a 90 degree bend."

Is there no aerial photo in the Geoportal?