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

Is the SM allowed in the north in terms of dimensions? That is already a large load. What is that below the fill concrete? Is the Muschelkalk exposed there? Have the test pits in the area of the house brought rock to light? How deep did they dig? It doesn't look very deep.

Your house is 8m away from the property boundary. A structural engineer should calculate whether the house can be placed there and still as deep as planned. Draw the SM to scale in the section. Then post that.

Is the retaining wall in the north allowed in that dimension? That is already a huge load. What is underneath the concrete fill? Is there Muschelkalk standing there? Have the test pits in the area of the house revealed rock? How deep did they dig? Doesn’t look very deep. Your house is 8m away from the property boundary, right? A structural engineer should calculate whether the house can be placed there and also as deep as planned. Draw the retaining wall to scale in the section then post it.

No, it is definitely not allowed like that – but I don’t care. I don’t want to piss anyone off and the wall can be 10 m high in the north for all I care. But of course, I don’t want his house to slip – especially not while we are living downstairs. Underneath the concrete is the Muschelkalk. The geologist actually wanted to dig 4 m deep, which is why the big excavator was called. But since the rock lies continuously at about 1.5 m depth, we dug 5 holes and left it at that. That’s right, it is 7 m away from the boundary and a structural engineer will be involved with the expert report. The problem is that the wall is already supporting the shell of the house. I don’t think they will allow them to dismantle it. I will draw it in as soon as the little one is asleep :)

If there is rock, I rather don’t see a stability problem. More likely a cost problem. Then an experienced architect should really come here to minimize the excavation. The design shown is rather the opposite. Take a look at my last section. I didn’t put the building in the south on supports for nothing.

Is the house in the north so close to the boundary? Was that somehow measured by the surveyor? Or is it visible from the building plans?

The stability is there, the missing drainage and gravel foundation are probably more of a point to consider.

An experienced architect -.- Everyone I ask are total slope experts; we’re actually working with one, but it’s so tedious to get hold of him. I still have another one up my sleeve from the Taunus region. I’m sending both the new findings from today now. Then we’ll have to see what comes next.

The grey beams are roughly the walls.

Your last design is the one with the bungalow, right? The LRA subtly but insistently advised me to build a building on 3 levels.

Do I have to forget about cutting back the north side of the rock to the desired height because of the rock, unless I find a few hand grenades? The driveway will also be a nightmare if I put the house even higher on stilts.

Please correct me.

Alternatively, I can also put the house on the western property and give back the eastern one. As soon as I build in the west, the east is definitely unbuildable.

The building area in the north is still further away from the border than yours. So at least 8 m, that should have no impact on the retaining wall.

The retaining wall is just stacked. No water accumulates behind it.

Ask the earthworks contractor about the price for excavation stored on the side and the extra charge for rock.

My last design planned one house on the western plot.

For the retaining wall, however, the rock is not at a depth of 1.5 m. Rather 80 cm.

If the 1.5 m rock horizon is realistic in the building area, then the excavation in the rock is not that much.

But your carport at the street is then almost completely in the rock.

The plot in the east is then not buildable, but corresponds to the distance to the forest. A nice garden for free.

The 3 floors are certainly the most effective solution. But that was not in your specifications.

If you now want to build 3 floors in the west, then we start again from the beginning.

For example like this.
[ATTACH alt="Grundstueck69.JPG" type="full"]63754[/ATTACH]

Garage and partial basement at 210m UG 213 EG 216 DG / OG 219

With elevator. You save so much on earthworks and retaining wall.

Good morning and many thanks again for your efforts and work.

The retaining wall is mortared, the structural engineer needs to come. On the one hand, I need to protect myself when excavating the foundation pit, during the slope grading, and of course also to check whether everything will stay standing once my house is built.

The rock is about 80 cm at the wall, right. But my building area starts further down.

Yes, my specification sheet was very confusing. So you mean I should build on 4 levels? Where is the elevator then? In the house or for the car? I don't know if I want to put up with the elevator.

Ideally, I would of course like to keep the east - it will be more expensive just because of the driveway and SW, but in return we would have 600 m2 more garden.

We will meet with the earthworks contractor next week for the calculation.