Opinions on our house concept

Hello people

thanks for the many responses.

Attached are a few sketches with dimensions. Without a basement, this should be about 170m².
The upper floor protrudes a bit. This is the maximum I am legally allowed by the basic distances. The overhang will then be adjusted to the technically possible. As far as I could find out on the internet, one of the advantages of steel construction is that exactly such constructions are easier to implement. In emergencies, a support column would also be possible.

Expensive and uncommon in single-family house construction

The budget is currently at 320K€, although up to 380K€ would be possible. The goal, however, should be to need less instead of more

I hope this is supposed to be for the house only without additional costs and land. But for what you are imagining this is completely unrealistic. Prices in Austria are, as far as I know, still slightly above Bavaria. For 320 you get a standard house of that size, without a basement.

The desire is to get an inexpensive heating model for 20 years and to be able to heat the rooms differently as needed.

The basic idea is wrong. A floor heating system with a heat pump is inexpensive.

We now have infrared on the ceiling in the bedroom. The temperature in the room is about 2-3°C less than in the usual rooms, but due to the infrared radiation it feels a bit warmer than in the other rooms.

You still pay like crazy for electricity

One can really only agree with that. Both regarding the heating concept as well as the budget.

Smart home can be affordable, but I would (especially if I know my way around and am not reliant on external experiences) not resort to Z-Z-Wave if I can use KNX.

Z-Z-Wave is great for apartments and retrofits etc.

Nice that you signed up here. I think there are still many unrealistic pipe dreams that will end up in [Ablage P] before the first groundbreaking.

The difference between budget and design is so large that you might first want to get a rough estimate from a [GU] so that you believe us and we can continue discussing with you.

For the 300+x grand it will almost certainly be only 2 floors of the simplest construction type. With some luck maybe a garage. Overhangs or other fancy stuff – utopian. And nothing has been done yet in terms of terrain modeling.

The heating idea has also been doubted several times. I also think that infrared will be much more expensive than the common underfloor heating or radiators. Underfloor heating can also be regulated, and constantly heating and cooling the rooms saves exactly 0 compared to a consistent temperature with good insulation.

For the budget, you get 150 sqm on a flat plot + carport if the house is equipped cost-consciously.
You have to plan your house smaller and increase your budget.

Heating system
It doesn’t get more expensive. According to the energy planner, we had to hang a 900 watt mirror heater in the bathroom for 18 sqm as an additional heat source. That is 8.5 kWh scaled to your house size. Let those run 20 hours in winter and 10 hours during the transitional period.
Underfloor heating with gas or air-to-water heat pump

Washing laundry in the bathroom is something you do in a rented apartment. In your own house, it is an absolute no-go.

About the floor plan
Is the green supposed to be the staircase? It seems too small to me. Check it.
Where should jackets, shoes, bags go? No space for the wardrobe.
What happens in the hobby room?
Placeholder or really necessary?

Ground floor
Definitely furnish it once. It will not work well like this.

There’s no helping it.
Rethink the heating system.
KNX is not possible with this budget.
The house must be smaller and simpler. No projections, no recesses.
Remove the children’s bathroom; the washing machine could find its place there instead.
Remove the photovoltaic system.
Remove the hobby room, remove the garage, living rooms in your case bedrooms go into the basement.

Hello and welcome. You have a lot of ideas and like to think unconventionally. I like that. Your design looks exciting. I really like these "stacked bungalows." How you can realize this with your budget remains to be seen. Since I prefer to think in solutions rather than problems – have a look around the universities for think tanks on new construction methods. Sometimes you can set up a reference project where the builders invest as constructors. With conventional providers, your design will surely be significantly more expensive. The heating concept does not correspond to what is usually recommended at present. Electric infrared panels are inexpensive to purchase and create a distinctly pleasant warmth. For that, they must be placed well because sitting too close to them (e.g., directly underneath) is uncomfortable and energy is lost opposite windows. Potentially, the energy costs with these electric heaters are increased. Therefore, it is extremely worthwhile to invest in insulation and to use walls that act as energy storers on the inside, such as clay plaster. Downside: this consumes more than the savings in purchase costs. Please note that this is written by someone whose future heating system is also beyond the normal standards and who cannot yet provide proof that the conceived idea will also work. In Austria, there are excellent innovative and highly sympathetic companies in terms of heating technology. Just take a look at the different concepts. In my experience, most builders intensely ask themselves the question "Where do I want to live?" The significantly more important question, however, is: "How do I want to live?" A house is a shell for the life of the people who inhabit it. Habits, longings, attitudes, tasks, social connections, aesthetic sense, bodily awareness, and health – these aspects should determine the architecture. Building styles are suitable to support these aspects. Don’t press your life into a design idea. Design creatively for your life.

What is your heating system?