200 m² maisonette in an existing building, interior (almost) fully customizable

I have to admit, I don't understand this:
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How can you put a stairway, that is a staircase, in front of a door?
The staircase to the roof terrace requires just as much space and planning as the one between two floors. Upstairs is practically a third story.
And the staircase to the roof terrace must also work in the flow, meaning the walking rhythm, with the first staircase. So it should then also be close enough so that the floor of the upper floor becomes the landing of the next staircase. We don't want to talk about money now, or that there is supposed to be another kitchen in a small container or whatever up there. But the purchased meat somehow has to get upstairs. And the opened bottle of water/cola/wine/gin too. And also back down again.
Did your architect simply stop planning?
I have now played around a bit with the staircase and some walls. I noticed (I forgot to mention) that the children's rooms have rather a sad existence. At least the one with the north window. You would almost want to live in the bathroom. The proportions are also somewhat... well, you can tell that children still do not play a role for you.
So I would not let the staircase lead into the living area at all, I would plan a landing staircase in the hallway, under which the storage room will be accommodated.

Too bad, it would have been my suggestion to switch the use of the floors :)

Yes, as I said, the faster access to the roof terrace would certainly be nice from the living area, but for various reasons I think that having living rooms downstairs and sleeping rooms upstairs is easier and better to realize.

Now I understand your idea with the stairs, I actually find it quite good. Of course, it causes quite a bit of confusion upstairs but that’s why I signed up here ;) I will think it over and also discuss it with the architect.

I don't find it that great if the family entrance also allows business traffic, especially when there are options upstairs. For example, you could separate an office upstairs with the entrance door, and next to it the stairs to the roof terrace. In the basement, instead, a fitness and utility room.

I probably expressed myself a bit incorrectly. 99% of the office use would be without client visits. For a short meeting in the office, I don’t think anything would really need to be changed. But I will consider how your suggestion might look in practice.

Is there an existing plan of the floor / roof where the terrace is supposed to go? It is not insignificant if the condition is not to be met visibly from below.

I have to admit, I don’t understand such things: ... Did your architect simply stop planning?

Yes, he did stop planning there. The stairway definitely won’t be exactly there; that is just a poorly placed "placeholder." But you’re right, I have often heard in this forum that planning is done from top to bottom, so it probably won’t be any different for me.. At the next visit, the architect will take a closer look at the roof, then it will be adjusted. He made the current plans based on existing floor plans, and he probably didn’t really include the roof terrace yet or I didn’t give him the information in time.

I noticed (I forgot to mention) that the children’s rooms have a rather sad existence. At least the one with the north-facing window. You’d rather want to live in the bathroom. The proportions are also somewhat ... well, you can tell that children don’t really play a role for you yet.

In relation to the total area, the children’s rooms do look quite small, that’s true. But absolutely speaking, I don’t find that so bad now. My own children’s room was just as big (and that in my parents’ 180 sqm apartment plus two terraces. The apple doesn’t fall far from the tree, as they say..). But of course, we lack the experience. In which years do they really need more space? On the rest of the basement floor on the 3rd floor, we are planning to convert 200 sqm into two apartments for (short-term) rental; then, if it comes to that, one apartment could be sacrificed, but having a whole apartment as a teenager (even in the same house on the same floor) is just way too much :rolleyes:

But that’s true, of course, we lack the experience. In which years do they really need more space?

So, don’t get me wrong: it doesn’t have to be 20 sqm, I always find 15 quite nice – not too small and not too big. With your space, 16/17 sqm is also appropriate. But it’s about the whole: one children’s room in the north gets no sunlight. Then the bathroom: no window, no bathtub. The hallway also has no natural light... It’s always quickly said that the kids are of course allowed to use the bathtub in the parents’ bathroom. But that’s the thing: they are allowed. But if you look at the situation, it’s actually not intended, because then they are almost practically in the bedroom as well. It is planned by you so that it is your domain. Children’s rooms are living spaces; in the bedroom you can do without a lot of good light if you have to make a trade-off. And dressing room, fitness and bathroom – I would call them nice-to-have. But if you consider that children will eventually live in their rooms, they should get the SPD and/or west side. Fitness, dressing room and a nice shower bathroom could also be realized with the bedroom at the top right of the plan. Then above the kitchen the family bathroom with sauna, in the south the children’s rooms. Of course, you want to build your dream ;) But first the stairs should be planned. They are the connecting element of your three levels and the main traffic route.

Is there an as-built plan of the floor / roof where the terrace is supposed to go? It is also quite important if the requirement is not to be fulfilled visibly from below.

I will inquire and provide an update here as soon as I have something!