Floor plan optimization for a semi-detached house of 150-160m² on a 360m² plot in a new development area

We are also building a semi-detached house, with 8x12 meters. I took a look at your floor plan and here are my comments:

[*]Ground floor WC/shower: this is not a big issue, but give some thought to how you want to make the shower. A door opening inward or outward will probably be difficult due to space. But there are solutions for that.
[*]Ground floor WC/shower: I think in 95% of cases you will go from the living room to the WC. I always find it a bit inconvenient when I open the door outward in my direction and first have to walk around it. You know what I mean? But there might not be another solution for you. There is no space to open inward and opening the door the other way might collide with the front door.
[*]Ground floor: living room/kitchen: somehow I find the partition strange, but currently I have no better suggestion. It looks like a box inserted there.
[*]Upper floor bedroom: if you have two windows in the bedroom, I would find it nice to look outside and not lie with your head towards the window. But that is personal opinion.
[*]Upper floor bathroom: maybe think about a place for the towel holder or the wall heater. And regarding the windows, consider how you want to design the privacy protection. That ranges from roller shutters to frosted glass up to attached privacy protection (e.g., pleated blinds). If you want to do the privacy protection solely with the roller shutter, then think of an electric version.
[*]Upper floor Child 1: the door opens right into the middle of the room, is that intended? I would move it further to the right so that a closet fits behind it.
[*]Be sure to draw in the furnishings on the upper floor. You need to be sure that later a WC with a washbasin fits because of the sloping roof. And I find the right children's room relatively small and inconvenient. The 2-meter line is almost in the middle of the room and the 2.3-meter line presumably even further inside. The only wall for a tall wardrobe (and I do not mean a custom-made one) would actually be only the left wall. Then bed and desk would have to go to the right. All doable, the point is: draw in as planned and then check if everything fits.

As you can see, only minor comments. I think you have already come up with a good variant based on the specifications.

For me, the highlighted area would simply be a waste of space. In a house that isn't exactly huge based on the exterior dimensions, aren't there any better ideas (I can't think of any off the top of my head either) ...

Thank you for the detailed feedback I will address the points individually:

[*]A double door with standard shower width fits well, next to the sink there would then still be a small fixed glazed section. [*]The situation with the WC/shower door is exactly as you described: suboptimal but not really feasible otherwise. We will check during the final meeting whether opening the 73 cm door the other way without colliding with the front door is possible. [*]What exactly do you mean by "inserted box"? [*]As a fresh air enthusiast, I am very happy about the window at the head end ;) [*]Wall heating is planned between the shower and the room door. There should be enough space next to the sinks for towel rails as well. The privacy screen will consist of frosted glass panels. [*]Regarding the children's room doors, see my points under the illustration. Because Child 1 gets the very high area under the gable, installing a mezzanine is very likely here. The right children's room, i.e., Child 2, is also objectively the larger room when considering the living area calculation. It is also better situated, facing the garden at the back. It’s just not as perfectly shaped... A wardrobe is to be placed behind the door there (see comment under the illustration). Aside from the fact that there are also modular solutions for sloping ceilings, my father is thankfully a carpenter :) [*]The WC fits under the slope, the sink next to the door. It’s a minimal version after all...

For me, the highlighted area is simply a waste of space. For a house that isn't exactly huge based on the exterior dimensions, aren't there better ideas (none come to mind quickly for me either) ... [ATTACH alt="Bild1.jpg"]53260[/ATTACH]

You are not wrong there. The area under the stairs and up to the kitchen will probably be designed differently from time to time: -Play area as long as the children are still small. Later, a wall unit or shelves and a small desk or similar. And I definitely prefer the passage area to a long corridor. A sofa under the stairs was also an idea we discarded...

Why even have the shower on the ground floor? I think it's rather unrealistic for the kids to go two floors down and back up just to shower. We have a staircase similar to the one you planned in our new house. You can't get large items through it. So, for example, the box spring bed will have to be transported up via an external elevator.

For me, the marked area would simply be a waste of space. In a house that isn’t exactly huge by exterior dimensions, aren’t there better ideas (though none come to mind quickly either)...

Yes, that immediately stands out, and I’m still pondering.
I also find almost everything quite cramped. Yes, there is little space, but then I don’t settle for lack of space because rooms have to be small, I rather make it open so that I have air and a view inside the house. Nothing is worse than feeling confined.

Actually, the widths of the windows stacked above each other and the heights of the windows next to each other are the same at the front.

That would probably be the worst thing on 6 meters: staying in the lane ;)
However, it may be that you want it that conservative.
I really can’t delve into it because no questionnaire was filled out. None of us here know what kind of living style you want.
I can only speak for myself (I myself had an REH), and I wouldn’t buy or build a house like that, even if I had to be frugal. You can create really great things with asymmetry, you just need to observe basics like line guidance, for example.

The question is how important daylight in the hallway is to you.

You can also get daylight through a high strip window in the office, a skylight above the office door, or a slim window next to the office door. And then there is still the conservative method with glass in the door.

Topic window west façade: the storage room window is in such a place that it’s hardly useful because it takes up wall space. So it should be moved more toward the center anyway.
The bathroom window: the bathroom should be arranged differently as well. It is almost 11 sqm, and I’ve seen better-arranged bathrooms with just 8 sqm. So just take the freedom to pursue a different line guidance for the windows. The utility room window is not set in stone either.
I really like the entrance (except for the door). Make sure the builtin closet has a real 60 cm depth so it fits four people.
The utility room is quite small. Where do you want to do the laundry?
I would use the stairs to generate a storage area underneath.
Stairs: they have probably been moved back and forth many times in the planning. In my opinion, they are currently in the wrong place.
First, a double-wound staircase gives more space. I would take that. Then you come out into the hallway and not beside it. Rooms can then be structured better. I would shift it about one meter to the right on the plan. 4.80 meters remain to the right side, which would be sufficient for everything.
Great room: it doesn’t suffer from that. The great room suffers more from the partition wall and the rather narrow sofa wall. You can fit a Klippan sofa with a side table or lamp there, but no family sofa. Between sofa and stairs is empty space that can be used differently. The dining area is also not ideal. The partition wall takes up too much. And you actually have enough walls, don’t you?
Upper floor, everything has been said above, the attic is okay.

My suggestion (how I would do it, assuming you don’t come up now with a huge front garden to the west or something that might be different here than an average plot)
Double-wound stairs shifted one meter to the right.
That also gives the WC a place for a shower. The 2.xy meters you probably wouldn’t want to use for showering.
Great room: small/narrow partition wall only as an accent.
Two walls lend themselves to furniture placement: the top right side and the utility room partition wall. Everything else should somehow be sprinkled with windows. The utility room at 2.40 meters is too short for a sofa, the kitchen works. 4.80 meters is too long for a kitchen, good for a sofa. So the first calculation only suggests one variant, i.e. living room/kitchen swap.
With TV on the wall (swivel arm) and dining table with the short side also along the window wall, which you probably have already dealt with for 6-meter-wide houses.
Kitchen as a two-liner, pantry under the stairs.
Why are you building solid with 39 cm walls? I would have taken prefabricated construction to gain width.
As I said: I also only had 5.50 m in width. Nothing was optimal... narrow kitchen, tiny WC, open stairs to the cold basement... but I admit, at least no utility room on the ground floor. But: everything was open, including 8 sqm window fronts in the attic and ground floor on the short sides. Then it doesn’t matter if a TV is in front of the window or a sofa in front of a window without a parapet, with 20 cm of distance of course. That gave a feeling of more space than a normal window above the couch with no distance to the couch.
Make the corner of the house toward the dining table open with windows.
You can make a privacy screen outside as a hedge. That would be my tip.
I don’t know where your journey should go.
Again, about the windows: as few different ones as possible. I see no reason here for such a variety of different ones.