Steep slope floor plan single-family house from the beginning

As it looks, I would probably also plan a basement in an L-shape, similar to what is currently drawn with the carport. But no carport, instead living space. And on the rear part, as currently planned, one floor with a roof. Execute the basement with light wells on the sides and arrange the rooms cleverly. And yes: the house is not family-friendly. I don't find it bad if you start thinking this way at first. You have to feel your way into it. The air space, for example, transmits sound from the ground floor, the two-seater does not accommodate a family to watch TV, nor does the entire room. Individual family members have no retreat, except for the sleeping area. Small children cannot be cared for at night. Teenagers walk through the parents' chill area. Etc.

Thank you very much for the answers. Some points were familiar to me, some are new. I would like to stay with the half-basement. The earthworks are a major cost driver, I want to keep them low and rather work with the slope. A basement as living space makes sense and for that the attic can be omitted. The children's rooms could find a place in the basement. In the long term, an independent living unit could be created there if one of the parents needs care. I have drawn a floor plan in the basement. I would extend the basement further out than the ground floor. That then forms the substructure for the terrace to the south. The ground floor has also grown in size to 8x17.50. The basement to 5.5x 21.50 Sorry for the poor lighting.

You did a pretty good job again. Just thinking in approximate terms and assuming walls are load-bearing in doubt is already very good. Between the bedroom and the bathroom of the [Einliegerwohnung], you haven't yet considered that there is an exterior wall above, so you have to reckon with something thicker or a support, a beam, or the like. From my point of view, that is enough now to have as a comparison in the back of your mind when you go to an architect (but without showing this to him - wait first to see which design he develops with you).

I suspect you need to gain height because it is a really steep west-facing slope and otherwise you would live in eternal shadow. Therefore, I raise concerns about the lighting situation and advocate for the design from the first post. So, a utility basement as the entrance area and base floor; then two residential floors above. I would also prefer to execute the attic with a high knee wall and a flat roof to get windows, especially on the western eaves side. Do the trees & bushes to the south cast additional shadows, or are they rather low and light?

You could move the basement 1-1.5m towards the street. This could further reduce the basement costs and make the actual residential building appear less bulky. Whether this is done along the entire front or only the southern part depends on the entrance and parking spaces. To make the stairs usable without a dormer, the attic could also be cantilevered to the same extent, which would of course affect the obviously desired clear cubature (and with a higher knee wall wouldn’t be necessary anymore). In the attic, I would definitely omit the air space in favor of a room. You could move the living area there to also make the ground floor more spacious.

Another idea would be to extend the roof by 2-2.5m to create a loggia in the attic as well as a covered area on the ground floor.

Two more requests: could you post the height plan in a somewhat more readable form? And do you have a plan or can you describe how the terrain runs in the wider surroundings (approx. 500m)?

Do you actually have a chance to have the sun path simulated? You could place any desired cubature into a 3D plan and simulate it at different times of the year/day. Or can you somehow see it live on the property (e.g., on a tree, or if there is currently a meadow, hammer an 8m pole and see how far the sun currently reaches)?

Do you actually have a chance to have the sun path simulated?

Simulating the sun path should be possible online on the geoportals. At least on the Geoportal RLP it works.

If the building is situated higher, there are only advantages apart from more stairs:
- more light, especially in the evening
- better view
- less influence from the street, which is only a connecting road to the neighboring village with little traffic.

Ideally, I would like to put the house on stilts, at least on the street side and on the hillside only a strip foundation and then build two full stories above ground. That would reduce the expensive earthworks to a minimum and would be just right for the rocky ground. Has anyone ever implemented something like this? Or knows someone who has? As customer projects, I have already realized some extensions that stood on supports; these were always very economical solutions.

I once discussed a similar concept with the municipal council, they gave the OK, I think you need a structural engineer who is motivated enough to calculate something like this.

Here I have pictures showing how the different cardinal directions look on the property. However, when photographing, I stood at the upper edge of the property; based on the neighboring buildings in the north, you can recognize the steepness. Although, as already visible on the site plan, the building volume is very steep.


North side


Field to the west (as mentioned, photographed at the upper property edge)


South


East

I hope it’s okay to share the pictures like this?
I will provide the site plan with contour lines as soon as I have access to it.

We will probably hardly use the loggia or balcony in the attic, but it would be good to roof the terrace on the ground floor (at least part of it). Here I just have to make sure it doesn’t cause too much shade.
The idea with the sun position simulation is great. I think I have access to the appropriate software once the concept is finalized.

Currently, I am warming up to the idea of giving up the large master bedroom on the ground floor. There is enough space for it in the attic; if necessary, the open space will be sacrificed, which will save me at least 3 meters in house length. It should actually not be more than 150 sqm. The idea of the granny flat in the basement is nice in theory, but I myself know that for countless reasons a granny flat in a new build is pointless.