Single-family house - final version - do you have any optimizations?

The discussion will soon begin whether the living room/kitchen is better placed in the basement (due to access to the terrace). I think both have their pros and cons and it is a personal decision - I myself wouldn’t know how I would do it! What I notice about the floor plan is that to get to the basement, you always have to go through the kitchen/dining area or through the living area. That means if the kids bring friends over, if they sometimes come home late as teenagers (and maybe the first boyfriend wants to sneak out late), always through the living area. The neighbor who is invited for a beer in the garden – also through the entire living area. Personally, that would be too open for me.

Thank you very much for the feedback. Yes, the staircase is a bit daring. The decision was ultimately conscious (so I can control my teenage kids’ future dates). Just kidding... We have seen many floor plans where the staircase, although not as a room divider, is also open in the living/dining area. Ultimately, both have the downside that as a parent you might not be completely undisturbed. But if mom and dad are not supposed to know about a visit, the kids still have a few options open in our floor plan. The neighbor can gladly take the short path from the vestibule towards the kitchen/balcony.

Living on one level is possible, but it is not accessible for disabled people. That is why I asked. Walkers, medical chairs do not work either, and the nursing service has a very hard time (bedroom and especially bathroom are too small).

I am still not further with the basement. I will write down what bothers me. Maybe someone will come up with a solution.
Building services is a narrow tube.
The wall to the bedroom must definitely be equipped with soundproofing measures. Washing machine, dryer, heat pump.
Huge hallway in the basement but small children's rooms in terms of floor area.
The office looks like a leftover piece. It will definitely be very uncomfortable and dark.
For the basement room that is accessible from the outside, I would not give it a door into the apartment. Burglary protection, coziness, such a fireproof, lockable door always has something of a basement.

A lot has already been said. Basically, I share most opinions. For me, a balcony belongs to an apartment. If it’s a single-family house, then it’s a nice-to-have for drying laundry—nothing more and nothing less. Direct access to a garden makes life in a house; everything else becomes a burden by the second summer at the latest. When I think about how often we still go out in the evening to tend or water the garden... or to get herbs for cooking. usually has the good argument about the children wanting to romp in the garden and mom having to pack the travel bag... not even being able to quickly get a juice. Well then, the first house is built for the enemy

Further thoughts:

Accessible or for later stages of life: You can live completely on one level since all important rooms are on one floor. The guest room can be converted into a bedroom. So you don’t have to climb stairs.

And what about the basement? The caregiver walks into your living room? Shower toilet too small and too far away.

A side-by-side refrigerator is planned in the recess near the airlock. I think that’s enough workspace for me.

The refrigerator does not fit into the ergonomic workflow of a kitchen; it is outside the area. There is no “but” here.

Access to the garden is on the ground floor. From the balcony towards the garage. There will be mounding in the garage area and

That’s not exactly what you want, is it? See above.

The stairs between the ground and basement floors will, of course, get a glass railing.

One can assume that. But instead of a stair leading up, another room divider (which is not great here either), a basement stair as a living element has to be planned differently. Something is missing to design the space here upwards. Table, railing, sofa... all only hip high. According to Feng Shui or other spatial teachings, something that pulls downward is often assessed negatively and at least needs compensation. Basically, you look from the sofa onto the stove

Unfortunately, I can’t open the views and site plan at the moment, but I notice: The walk-in closet is trapped in the bedroom. If both get up at different times, that’s a big problem, since you have to pass the bed each time (light on, light off...) The basement seems somehow suspicious to me. Whether that’s the long utility room (tube), I don’t know. Something about it feels off. Maybe it’s the basement corridor to the workshop and two children’s rooms. The entrance area with a change of direction combined with a long hallway is not inviting on the ground floor. The location of the stairs would take too much privacy from me as a couple if children live in the house. The airlock or backup kitchen I find okay. Also the idea of building only two floors. Whether the measurements add up I can’t say because I can’t see them well right now. I don’t think you want criticism. No one expects anything to be changed, but that it can be understood.

- Staircase as a room divider on the upper floor is questionable under certain circumstances, as it is a dark hole surrounded by railings, something one has to like. It is not a classic open space, but will appear to be what it is: a cellar staircase.

The staircase is probably a matter of taste.
Maybe as a supplement.
Due to the huge window areas on the south side, there will probably be no dark holes.
The staircase on the ground floor and basement will naturally get a glass railing.
I hope we manage to make the staircase in the living area not look like a cold cellar staircase leading into the chamber of horrors.

I fully share this description, it is not a matter of taste, therefore I do not share the hope in the slightest.

First of all: the house is not even remotely rollator-friendly – but it does not have to be; at 28/30 years of age, you will almost certainly belong to the generation, more secure than a lottery five plus an additional number, that builds again close to retirement. The terrain on the long uphill side has about 1.40 / 1.50 m height difference, on the long downhill side it is about 1.60 to 1.90 m – here I see the idea of split level nearly mercilessly jumping onto your lap, but no residential basement. The house concept is almost alpine, decidedly too much for moderate Alb locations. And therefore with the almost inevitably resulting children's storage rooms. The roof even turns with its crooked hip directly against the slope. The architect has fallen in love with slightly Bauhaus-style hillside chalets of the seventies, but he should not try to treat this on your property. Child 2 has on the path along the foot end of his bed a "roof slope" of four stair steps—I suspect a still very inexperienced young architect.

In this respect, you are in the best company here with your "final version" in the headline, already well established as a running gag here. But after the self-awareness from the opening post

We probably no longer have the necessary distance due to the long planning period.

I read this "finality" more in the sense that the powder has been spent and the stage of mature operational blindness has been reached.

By the way, my dumb question: how are interior walls understood at thicknesses of 12.5 and 20 cm – in other words: what materials are supposed to be, I read the thicknesses as a material change compared to the exterior walls.

I am less concerned with the floor plan than with the estimated amount of 500k including incidental construction costs. The double garage, glass fronts, earthworks, retaining walls, photovoltaics and solar, glass railings, etc. I would now intuitively assume to be (significantly) higher. How many sqm of living space is it in total?

Interesting but unfortunately not my thing. Most of it has already been said.

What immediately puts me off is the airlock next to the kitchen. If the car exhaust regularly blows over my holiday meal in the kitchen, I would be full already. But okay – let’s hope for electric cars in the near future.

The chill area somehow doesn't allow for coziness. The openness is actually nice but the stairwell hole in the middle looks exactly like that – a trap where monsters wait in the depths.

The basement and technical rooms in the lower floor take up gigantic spaces and the children are left out. Also unevenly distributed – and for one child you will probably see the stair steps on the ceiling. That borders on botched work.
Also nice if the children, out of boredom, watch the electric bikes in the bedroom from the terrace. I would completely replan this, I think.

For sitting outside and drinking coffee, you probably need a dumbwaiter from the kitchen to the lower floor. That would even be doable – I don’t think we ever had that here before and it would be something new.

Overall, I still see the thing as livable. If you like it, go for it.