Floor plan of a small single-family house on a north slope 170m²

The north arrow is correctly drawn. The entrance would be in the south on the upper floor, where it says entrance. And the floor plans also match regarding the cardinal directions.

The north arrow is drawn correctly. The entrance would be in the south on the upper floor, where it says entrance And the floor plans also match regarding the cardinal direction

Ah... now it makes sense.. I was confused by the statement:

however, then we would have no southern windows at all

Yes, the statement referred to if we were to make the living space downstairs

Yes, the statement referred to if we were to make the living space downstairs

Yes, you're right. I was a bit unfocused :oops: I don't really like the parent wing... I'll try something out if you're open to suggestions. The house shouldn't be any bigger or more complicated if you want to manage with €400,000.

Yes, you're right. I was a bit unfocused :oops: I don't really like the parent wing... I'll try something out if you're open to suggestions. The house shouldn't be bigger or more complicated in any case if you want to manage with 400,000€.

I am very grateful for any advice

I played around a bit... and since it was Friday, also a little with decoration and color, which I normally don’t do. See below.
I call it playing!
Meanwhile: You mention something about 400,000, and this is about an extreme hillside construction. Your 3D version shows a south terrace, which is quite expensive to build. I think you have to pay much more attention to terrain modeling than we laypeople realize. The house shown here breaks your budget. It’s also not a hillside house; it is placed in front of the slope.

170 sqm... hillside... and there’s quite a lot of messing around with the living square meters: if we take a foyer of over 20 sqm in the basement, what is it used for? Basically, of course, for openness and access to the garden. But in my opinion, you can’t afford that. What kind of gym room is that? The technical room is okay in size, but there is no storage space on the ground floor. The mentioned attic for storage space is also not exactly a room with headroom. I would only plan to use that for the bare essentials twice a year.
Down in the basement, it doesn’t feel like living space to me personally. I would, for example, ensure that a generous stairwell creates a connection from bottom to top. Also, a continuous window would connect the spaces. Below, the staircase start looks more like it’s meant for access to a granny flat. This door (in the basement) will probably be used very often, considering it’s the easiest way to get to the garden. To me, both staircases (outside and inside) feel too separated. Can you see yourself carrying a coffee pot and book downstairs to chill under a tree? Can you see yourself playing with the little kids in the garden while having to go inside for every juice glass? Kids alone, you upstairs?
But I digress, I was talking about frequent use, which is equivalent to sand, dirt, etc., in the entrance area. The kids who later run up and down the stairs several times a day will always have to walk through sand grains. What you want to avoid in your own main living floor, you build in there. Personally, I would also orient the living rooms more towards the staircase area. Then you don’t feel so isolated downstairs. In summary, it just doesn’t really have a living character downstairs. It lacks coziness, terrace windows for the children’s rooms, a hallway that acts more like living space and not just a passage outside — at least not if the kids always have to pass through there.

Regarding the rest of the floor plan: in my opinion, the multitude of doors in the parents’ area does not work at all. The two bathroom doors will cause problems: they get in each other’s way. I also don’t know if they are practical for everyday living. In our house, no door except the cloakroom and utility room doors are closed. Who is that disciplined and always wants to close doors inside their own home?
I also think artificially stretching a hallway into the interior to gain kitchen space is problematic. I would just try placing the stairs to the south, the kitchen toward the “shorter” balcony in the north, and then a garden staircase from there, either sideways and shortened by grading or directly north, all oriented towards the garden.
South windows are important, but you can rarely truly enjoy a south terrace. Besides, since there is a road mentioned here, you won’t really find the peace that you get in the rear garden area, which is also sunny.
Therefore, as a layman, I would forgo a south terrace, which would be better placed with grading/slope on the west side with access to the garden.

However: if you let a professional plan it, the house will certainly get a more cost-optimized and better design.

About my little play: I tried to plan the dressing room as a connecting space and not the bedroom. I also separated the toilet. It is connected in the plan with the master bathroom by glass doors, which can be frosted if you don’t like that. Thus, withdrawal on a small area is created. Maybe that’s an idea for the next experiments...
Yes, while modeling I realized that both floors would benefit if the stairwell (rather a two-flight with more openness and not one with a basement character) were planned elsewhere. And the kitchen or dining table placed where you approach it.