Floor plan optimization barrier-free house on a hillside

What actually goes under the stairs? As shown, you have a dark open hole there. That is rather unusual.

I would put the study in the basement. With the elevator, that's no obstacle.
Find the children's rooms unevenly distributed

Are all doors (door width) accessible by wheelchair? The doors on the upper floor look almost a bit narrow. Since you can get to all floors with the wheelchair via the elevator, you also want to be able to access all rooms.

I would definitely include the basement in the thermal envelope and use it, for example, as an office.

I would definitely not build a "privacy screen" in the hallway. In the entrance area, you then have that certain WOW experience when you can see everything in your line of sight as you come in.

Are the square meter Angaben in the children's rooms correct? The one with 15.52 sqm looks much bigger than the one with 16.08 sqm. Do you have twins? And then in rooms of unequal size? I would make sure that all rooms are the same size.

How do you get to the basement? Is its staircase moved under the stairs from the ground floor to the upper floor?

I would not only make a privacy screen between the entrance and the living room, but even a wall with a door (e.g., double-leaf glass door). Sitting with your back to the entrance "in the draft" is less cozy in my opinion. It’s a walkthrough room anyway, which I don’t find ideal.

I would also put the study in the basement, there is a lot of space, which you could use well upstairs. I find the kitchen a bit small, and the dining table is in the way; it should be moved slightly away from the terrace door towards the bottom of the plan. Or the terrace and the large window could be extended all the way to the left wall and the door placed in the left corner, then you can walk/roll past the dining table on the left.

The space for wardrobes in the bedroom is also not exactly ample, another reason to place the study downstairs. I find the bathroom sufficiently large; 10 sqm should be enough for a shower bathroom.

What is the ceiling height there? I believe you can hardly get living space cheaper and with a window – those are living spaces.

Sorry for replying only now: The ceiling height in the basement is 2.40m, with no screed and no insulation installed.

Oh, that also has to come along. Who’s playing?

The son is trying, I hope he stays motivated (he is 9 years old).

Cool, the house-building forum piano quartet with and

Maybe we also have some home builders with good voices.

Since an elevator shaft is not airtight or a nice connection from the basement to the rest, I can’t imagine that it’s possible to separate the basement from the rest of the house in such a way that it lies outside the thermal envelope.

At least that would take the decision off our hands, I have to verify that statement.

What actually goes under the staircase? As pictured you have a dark open hole. That’s rather unusual.

Under the stairs is a staircase to the basement.

I would put the study in the basement. With the elevator that’s no obstacle.
Find the children’s rooms unevenly distributed.

As it looks, we will plan the office in the basement.

Are all doors (door widths) wheelchair accessible? The doors upstairs look almost a bit narrow. Since you can reach all floors with the elevator in your wheelchair, you want to get into all rooms too, right?

I use an active wheelchair that is 60 cm wide, so I manage well with the standard doors.

I definitely wouldn’t build a "privacy screen" in the hallway. In the entrance area you then have that certain WOW effect when you have everything in view as you come in.

That’s a matter of taste, a friend has it like that, we’d visit him in the coming days (if the current situation allows).

Are the square meter sizes in the children’s rooms correct? The one with 15.52 sqm looks much bigger than the one with 16.08 sqm. Do you have twins? And then in unevenly sized rooms? I would make sure all get the same room size.

How do you get into the basement? Is its staircase moved under the EG-OG staircase?

I wouldn’t just make a privacy screen between entrance and living room but even a wall with a door (e.g. double-wing glass door). Sitting with your back to the entrance "in the draft" is less cozy for me. It’s a passage room anyway, which I don’t find ideal.

I would also put the study in the basement, there is plenty of space you can well use upstairs. I also find the kitchen a bit small and the dining table is in the way, it should be moved away from the terrace door toward the bottom of the plan a bit. Or stretch the terrace and the big window all the way to the left wall and put the door in the left corner, then you can walk/roll past the dining table on the left.

There is not exactly ample space for wardrobes in the bedroom either, another reason to put the study downstairs. I find the bathroom sufficiently large, 10 sqm for a shower bath should be enough.

The sqm are planned like this for now but should be adjusted. Yes, we have twins, one daughter, one son and of course the big pianist.

Yes, the office is now planned downstairs, I think it will do the floor plan good. There should be enough space for wardrobes in the bedroom size.

About the space in the kitchen and the dining table, it seems we all agree it will be a bit tight. I hope a floor plan without an office will counter that.

Thanks a lot for all the comments. I will see to what extent we can incorporate them into our new floor plan.