3-FH planned without basement, your feedback on my floor plan

I find it definitely better!

I also fear a misunderstanding: the architect probably sees the classic semi-detached house here, with one residential unit on the right and one on the left. You want to plan on one side your (large residential unit) and on the other side two smaller units. Such a semi-detached house does not necessarily have to be symmetrical; for example, you can allocate a bit more floor space to the part rented out to others, then it will also fit again with two units each on one level.

What is correct is: there are two house entrances.

I get the impression that the architect has a bit of trouble thinking beyond symmetry...

while with the central staircase one is significantly more flexible in the development and division of the apartments

Thought of mine/ours: right semi-detached house half, completely for us spread over 2 levels with an attic and left half rented out with 2 apartments (ground floor and upper floor).

He also said on the phone ... exterior dimensions for the object are already at the limit, namely 12x15 ... maybe that’s the reason?!

I spoke to our architect about it.....

We can still change our minds at any time, but he listed the disadvantages for us:

- you need 2 house entrances, which means (more than now) rentable living space is lost and you only get one (large) apartment on each of 2 floors, so only 2 residential units on 2 floors (instead of 3 residential units as mentioned above). (I need to follow up on this, there might be a misunderstanding here)
- it is difficult to reduce the size of an apartment or similar,

whereas with the central staircase you are much more flexible in the access and layout of the apartments

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Thought from me/us: the right semi-detached house half completely for us spread over 2 levels with attic, and rent out the left half with 2 apartments (ground floor and upper floor).

Advantages for us would be:
- a bit more privacy and we could fully utilize our side if we remodel the attic, and in the evenings we wouldn’t run into neighbors in the staircase as in the first variant, we could then plan 2 children's rooms instead of 3, since our son could move into the attic.
- and if we are ever alone and the children have moved out, we could take the smaller apartment on the left (ground floor) and rent out our large one again.

What do you think?

I would also find that much better, regardless of the division. That way you can move into concrete ideas and initial planning – provided the architect is not resistant. Then he might not be the right "partner" for your project...