My floor plan for a 4-family house, please share your opinions

Unfortunately, I don't know the other threads of the OP by heart, why do there have to be 2 entrances? Development plan? With one you save space and get windows in the bathroom: (The layout is always similar)

But you do know that the building frame is about 16 x 16.5?

the above is probably too big (estimated dimensions) the lower one does not meet the TE's expectations. Of course, you can fit a window in a bathroom, but not with the room layout as the TE envisions. That was the problem here. Convince the TE to have one less residential unit, then there will be light in the dark bathroom.

But you know that the building envelope is approximately 16 x 16.5, right?

Is that stated somewhere, or is it estimated from the plans? Do the rules for the clearance areas apply according to the building plan or according to the building regulations?

You do know that the building envelope is about 16 x 16.5, right?

Nope. Unfortunately, I didn't catch that now. That's the problem when you start a new thread every time.

The two residential units should be able to be combined without much effort; until then, the ground floor forms one residential unit and the upper floor as well as the attic form a unit (maisonette).

Is there a limit of 4 apartments? I could imagine that it would be easy to achieve the option of "combining" (how important is that anyway?) if you build 6 apartments, that is, only one per floor. This way, no space is lost due to additional stairs, there isn't the 4-room attic apartment which is rather inconvenient for families, and you could plan with 2x 3-room apartments as well as an attic apartment per half-house. It will only be difficult regarding parking spaces, maybe then in the south garden, and if you ever want to use it as a semi-detached house, then grass will just be sown there.

P.S. If you had small children, you would notice that stairs, front door, and then garden are difficult. Example: You are in the garden and the child wants something to drink. In one case you go to the patio door, into the kitchen and get a cup. In the other case you leave the garden, close the garden gate (child thinks you leave -> screams), go into the house (child no longer in sight, can get into mischief), walk upstairs, get the cup, walk downstairs ... etc. Of course, you can think of everything beforehand and pack everything. But then you might as well just go to the playground and don’t really need a "private" garden anymore.

Is that stated somewhere, or is it estimated from the plans? Do the rules for the setback areas apply according to the building plan or the building code?

There was another thread I dealt with once. From memory and the site plan, it fits. That's why it's only my approximate figure.

Nope. Unfortunately, I didn’t catch that now. That’s the problem when you start a new thread every time.

But the site plan is on page 2

(how important is it anyway?) to be achieved when building 6 apartments, so only one per floor.

6! Apartments???

In the other thread, I already complained that 4 housing units on a single-family house plot in a residential-only area are too much.
There was also a maximum height.

maybe then in the south garden, and if you ever want to use it as a semi-detached house, grass will simply be sown there.

South garden? There is a 3-meter border strip there...