Single-family house with a ground-level granny flat on a slope

Do you happen to know if a precast solid basement is just as load-bearing as a solidly built basement?

Solid is solid - whether partially prefabricated or made on site.

22m house width would be almost 8 parking spaces. So if that many cars are really planned, there will also be enough budget ... I would look into whether the granny flat could be placed in the "garage floor" with a southwest orientation and a small garden on that level. Level 2 then with living rooms and a terrace with access to the garden in the west. Possibly also the children's rooms on the 2nd level (one would have to see how big they would be) and level 3 then as a private space (possibly also an office) as a setback floor with plenty of terraces. I can imagine a very nice house on the 2 plots together. But in terms of cost and design, it would probably lean more towards ;) .

22m house width would then be almost 8 parking spaces.

Eight little cars for two households ? ? ?

Thank you for your responses.

Would it be bold to make the terrace/balcony at the back a bit bigger so that
a) there is more space upstairs and
b) there is a roof underneath?
Also, I imagine a staircase directly into the garden. Is the balcony planned to go around the house, i.e. on two sides of the house?

Why bold? That’s actually how we originally wanted it: that the double garage extends 4 m outward and forms our terrace above and 3 m under the house below, so that you can get from there into the cellar and then via a staircase into the house. The terrace is supposed to connect both living units. Since we don’t need a 22x4 m long terrace, we would also like it better if the terrace is shorter and connects directly to the ground.

I think there is a misunderstanding about the cellar wall: the statement was that if you have a cellar in a hillside, the house standing on it should preferably be made of masonry to create a higher weight which stabilizes the cellar wall on the hillside side. It can be done differently (we, for example, have a rather daring construction of a masonry cellar with earth pressure beams and a timber frame construction on top), but it’s logical. In your case, therefore, more likely a concrete cellar (meaning also a prefabricated cellar!).

Your problem right now is the other side of the house, namely the valley-side access. Once that is solved, the cellar is child’s play.

I was just at a timber house supplier who told me that they built a similar house for one of their employees. They moved the garage forward but did not excavate everything; instead, they reinforced the rear wall in the ground and worked with half-levels along the slope. That way, they had less excavation and cellar but more "stepped concrete walls"... if I could explain it clearly enough.

22m house width would then be almost 8 parking spaces. So if that many cars are really planned, there will also be enough budget ...
I would look into whether the granny flat could be placed in the "garage level" with a southwest orientation and a small garden on that level. Level 2 then with living rooms and a terrace with access to the garden in the west. Maybe put the children’s rooms on level 2 as well (you’d have to see how big they would be), and level 3 then as a private area (maybe a study) as a setback floor with lots of terraces.
I can imagine a very nice house on the two plots together. But in terms of cost and design, that would probably be more in the direction of ;) .

No, of course not. We have 2 cars, the parents-in-law have none, the older one will come with his own in 7 years, and that’s it. Visitors can happily park in front of the garage.

We also have an access problem (front door 1 in the west via the garden and 2 in the east via the terrace).

Therefore, we have now considered placing a garage on each side, left and right. 7 m wide, 7 m long, between the two garages a garage (3.5 x 7) without a gate could serve as an entrance area and lead under the house to the stairs (left to one residential unit, right to the other residential unit). Then there would still be some space for the utility room and possibly a spot for the terrace furniture in the winter.

Thus, on the ground floor we would have no classic front door but, next to the terrace, a side, floor-to-ceiling window from which you can enter the respective garden.

Who is Rick2018? We definitely want to have the parents on the same level as us. It is simply nice to open the terrace on Sunday morning and have breakfast with the parents or just sit down with them and spend a few unplanned and extra minutes together.