Floor plan design single-family house (city villa 140 sqm) on a slope with double garage

Did you at least get and copy the analysis result of the neighbor's soil? Is it Z0 or Z1 soil?

Sorry to say this, but your neighbor probably found a ...... Now you will have to have everything that is surplus removed. Just as a thought experiment, transporting 1m x 12m x 9m of additional soil costs about €20/cbm for Z0 soil. For Z1 soil, three times that. You can thank your neighbor.

Yes, I have realized that by now as well. This is how great friendships for life begin!

No, it's my own fault, I should have informed myself better beforehand. I looked along the front (at the end of the property) and saw angle supports everywhere that then retain the property. Our property had quite a deep dip and I thought, "I need it anyway, and then for free... do it immediately!" I've been annoyed countless times but now it is what it is and I have to try to make the best of it! Just a stupid mistake!

Would not rely on that. You need a building expert/architect etc to come and decide what you can still do. Maybe just the area of the foundation slab needs the soil removed, properly filled, and compacted.

5 meters over the entire property was seen in the attachment.
What is the height difference in the area where the house stands? Essentially from the entrance to the patio door.

Before you plan, I would really clarify first what you can do now. Have it filled, remove the foundation slab area, or remove everything and start anew.

Suggestion:

- First, have a soil analysis done for your property! The analysis of the [Baugebiets] does not help you at all. Except that you now know that you have clayey soil.

Together with the geotechnical report, the earthworks become at least more calculable.

Otherwise, follow the other previous advice.

Hello Franky, you’re somehow confusing me right now. 1.5-storey buildings are classic gable roof houses. A city villa is two-storey. Therefore, you probably are not allowed to build the latter. The development plan surely specifies how high the knee wall may be.

I hope you didn’t act hastily with the plot. Apparently, there are still quite a few things you haven’t considered. It’s best to first get a civil engineer, go to the plot with him, and ask what is possible. Gather all the documents related to that and then estimate what will be needed for the earthworks.

Always keep in mind, we are many laypeople here who give tips just for fun and based on experience. With houses on slopes, there is certainly a lot to consider that a layperson does not know (statics, groundwater, etc.). So without an architect and a structural engineer, the most beautiful plan is useless.

I have a civil engineer who, however, lives quite far away. So far, he has only looked at the plot via pictures and has never been on site himself. That’s why I’m so unsure about the best way to proceed. I think someone from the general area would be better, especially because of the later construction phase/supervision and acceptance of the trades.

I currently lack some kind of “red thread,” what are the basics that first need to be worked through so that in the end you arrive at a realistic size (budget) for everything.

So something like:

[*]Have a soil survey carried out
[*]Commission an architect?
[*]...

Do you think that’s where it starts, is an architect the right choice, especially because of the costs? Based on all the impressions, I can no longer assess whether the available budget is adequate or not. The civil engineer told me that to calculate costs, you have to assume about €1150 per sqm (standard equipment) up to €1400 (premium equipment). Of course, it’s more expensive in other regions. You always read about higher values here. I’m therefore quite confused. What do your experiences say about that?

What is your absolute pain threshold with everything, so that except for [Rasen], [Zaun], and [Bäumchen] everything is set up? Because 250k€ is totally unrealistic

I wouldn't rely on that. You need a building expert/architect etc. to come and decide what you can still do. Maybe it's enough to remove the soil in the foundation slab area, properly refill and compact it.

You could see 5 meters over the entire property in the attachment.
What is the height difference in the area where the house stands? Basically from the entrance to the terrace door.

Before you plan, I would really clarify what you can do now. Have it filled, remove the foundation slab area or remove everything and start over

So my structural engineer said that the soil in the foundation area of the house needs to be removed. I estimate that the height difference from the street to the terrace must be 2.5 meters – about half of the total height difference.

What is more sensible (also in the long term), a building expert or an architect right away?