Single-family house - Opinions on our design

I fully agree with kbt09's proposal.

Until then, messing around with old suggestions is exactly useless for you.

Therefore: Wait for the response from the community, then come back here with it and until then definitely do something good for your own nerves. If in doubt, simply: Nothing.

Because honestly, it sounds like you are mentally at your limit. Neither good for you nor for potential helpers.

And here in the thread there are people who can and will be helpful if you provide the information as requested above.

Hello, I will gather the information and restart the topic in a new thread.
Nevertheless, I still have some questions about it.
1. The drawing of the floor slab is available and the architect used it as a template for the house.
All KG pipes were installed as shown + additionally 2 connections in the ground floor pantry.
The only difference from the drawing is that the floor slab is 12.49x12.49m² in size.
The floor slab was inspected and approved as okay by the structural engineer (30 cm thick).

--> what is the drawing of the originally planned house needed for?
The house is to be built exactly on this floor slab. No demolition is planned.

Somehow I cannot imagine that you cannot place a floor plan on such a large floor slab + the numerous connections. The architect also created the design that you declared unsuccessful because of the room layout.
It should be possible, for example with a different room layout, different stairs, both levels the same size, etc.

We would like to start in spring and the construction company is now pushing slowly because otherwise they will accept another contract and we could then possibly only start from the 4th quarter. I want to avoid double burdening as much as possible.

Please read the entire thread again.

There are still open questions like the passage between garage/house. Recently, dissatisfaction with the ground floor has been expressed. Although you have often written that you incorporated our thoughts, we have had little understanding of that... see bedroom arrangement, etc. Then always the staircase being in the middle but on the other hand you criticize the brightness of the stairwell. And so on, so really go through everything once and put it together in a structured way. That also helps you gain clarity. Anything you want to explain to others in writing, you have to have already thought through yourself enough to be able to formulate it briefly and concisely. And if you can't do that, it's an indication that you still have uncertainty yourself.

And therefore a restart, where you also present your collected thoughts, would simply be better.

Is the garage floor slab already in place? Is the superstructure of the cistern drain okay?

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And, has the architect you parted ways with ever given price estimates?

Somehow I can't imagine that on such a large slab + the numerous connections you can't place a floor plan. The architect has also created the draft that you declared unsuccessful due to the room layout. It should be possible with, for example, a different room layout, different stairs, both levels equally sized, etc.

You are misunderstanding the forum members here. It is possible. It is also intended to be done. Only your architect's performance so far has been deemed insufficient.

To make better suggestions, the helpers need the requested information.

The task (assistance) of the forum is to help you—with enough information(!)—to get to a better suggestion, which a professional (architect) then refines into a building plan.

The house is supposed to be built on exactly this foundation slab.

We can follow you so far. However, I consider it pointless not to discuss the "old" design at least "alongside" everything that can be developed "from the foundation slab" in terms of floor plan ideas. Perhaps it is a great starting point, and even the chemistry with its planner fits (?)

I also maintain that you should investigate the circumstances of the sale. If the previous builder is going through a divorce, fine. But if the reason is that a basically correct foundation slab unfortunately is at the wrong height or all pipes come out correctly but the insulation underneath was forgotten or something like that, then get rid of the thing. You seem to have somehow hopelessly fallen in love with this foundation slab. Being a builder is not only an emotional thing but also a matter of common sense.

The foundation slab was inspected by an energy consultant at the time of construction. Reinforcement and insulation are present. I have seen photos. Additionally, the accuracy was checked again by a structural engineer and the documents were reviewed. (used materials, insulation, reinforcement, etc.) I only received the information "personal reasons" for the sale from the previous owner. If the slab has been deemed okay by two independent experts, I see no reason to have it torn down.