Floor plan optimization single-family house on a slope, single-story + basement

That looks pretty good. Then one hopes that the construction area will still take a while.

Thank you very much for your detailed report. This evening, while we were at the playground, I looked at some inclines using the Scope mobile app.

The entrance to our underground garage in the multi-family house measures 14%, which is already too steep to comfortably walk up with the stroller.

From the playground to us it’s 12%, which is OK for my wife (as long as she’s not pushing the stroller, I didn’t expect it to be any different). I find it better but still sporty (with the stroller or for the parents), since the incline also includes a length of 35-40 m.

From the street to the front door I measured 5-6%, which is almost nothing. I know the measurements should be taken with caution, but as a guideline they’re good enough.

I also want to build as high as possible, as I expect not only a great view but also reduced additional costs. May I ask how high the walls are and what the support cost?

Where we are building, there is only "slope," so you can't be too picky about the incline. ^^

The retaining wall on the left in the pictures I attached, including the level area, was already there and will remain (so it was not removed by us). We just need to further secure the slope to the left of the retaining wall. It should be about 3 meters in height that still needs to be secured. Additionally, there is the securing of the driveway.

The slope securing was estimated at just under €25,000. L-shaped stones would be about €8,000 cheaper (€7,000 net). We live in a rather expensive region of Germany. I also believe that the additional 50 cm in height did not significantly affect the price overall ....

It is hard to say exactly how much extra cost is due to the slope, as it impacts many positions. According to our architect, he generously calculated based on the slope, but also advised us to add 10% safety on his "net house price." Basically, our entire budget for the outdoor area goes into the slope securing (and terrain modeling, so that later a terrace can be made directly without needing another excavator, etc.). After excavation and civil engineering, we will have used about 10% of our safety margin so far. Since it was originally only intended for the slope, I think that’s pretty good :). Since prices are rising at the moment, I am also glad about the remaining 90%.

When is the planned start of construction? In a few weeks, maybe I can tell you more.