Single-family house with approximately 160m2, basement + ground floor + upper floor with knee wall

I have never understood a laundry chute in a private household. You still run downstairs to wash and back up with the clean laundry. That's why we have a washing machine and dryer on the same level as our main bathroom and dressing room.

You still run down to wash and go back up with the clean laundry.

yes, but you don’t run down with laundry loaded (risk of accident), however I agree with you and you also have to go back up with the clean laundry, which is why we plan exactly that:

That’s why we have the washing machine and dryer on the level of our main bathroom and dressing room.

So far, I haven't encountered any objections in the discussions regarding the 1m distance from the street to the terrace.

In BW there should also be no objections. In NRW or NI, one would have to ensure that the terrace does not lie more than 1m above natural ground.

Is there a rule about this somewhere?

§ 5 and § 6 State Building Code

According to the calculations, would you then have to make the house much smaller in order to have a terrace, a garage, and an access road?

That would be one possibility. If there are no statements about terraces in the development plan, my suggestion would be: The terrace does not appear in the construction documents and is ideally only built after the final inspection. Floor plan I = 10m * 11m = 110m² Floor plan II = floor area I + garage + access road = 110m² + 22.44m² + 37.70m² = 170.14m² Floor area ratio I = 110 / 365 = 0.30 allowed 0.3 Floor area ratio II = 170.14 / 365 = 0.47 allowed 0.45 For the still slight excess in floor area ratio II, a waiver will be applied for using ’s arguments from #14. Perhaps it will even be accepted due to insignificance (0.02). Clarify this with your authorized construction document preparer; they owe you an approvable plan and must also be responsible for it.

Then you mean the laundry chute. Yes, I still have to look into that, at the moment I have just carelessly sketched it in that corner. I think it can be accommodated in the wall or in the technical shaft.

I only see one shaft there, and it says "technical shaft" written inside (?)

I have never understood a laundry chute in a private household.

You would either need a multi-channel shaft, or you would have to throw down not individual pieces of laundry, but collection bags. Because throwing laundry down mixed with the consequence of having to sort it out later in the utility room is not a significant convenience in my view – except for the young people, whose thoughtlessness is thereby encouraged. For pedagogical reasons, however, I firmly reject that.

: Ah ok then you mean the technology shaft. Yeah, I need that somewhere, so I don't know how else to do it if it's not built with masonry.

: Thanks a lot for the tips, I'll try to do it that way. Otherwise, it would really be a shame if we had to make the house smaller because of the terrace. Let's see if that's feasible.

Ah ok then you mean the technical shaft.

Which else?

I don’t know how to do it differently if not built with masonry.

That people still built such small stuff with masonry was as long ago as the Berlin Wall.