How does it continue? Construction beyond the rear building line

Therefore, one should plan a house on a plot of land and not force a planned house onto any plot of land.

Here's the ground floor, which roughly corresponds to our wishes. The lower left corner is not finished yet, due to the windows and more light.

Just as a side note: Your floor plan won't work with the staircase. Also, the passage in the hallway will be quite narrow.

: The architect is responsible for the details after all...

I agree with you! In an emergency, the garage could still be shortened and the utility room made smaller. I need to think about it again.

As I said, I am grateful for any suggestion or even criticism.

This makes little sense here in the forum; with the plot layout and the deviation from the development plan, an architect must accompany this. You can – if it even becomes necessary – also extend forward, that is to the east beyond the front building line, whereby I roughly assume that you will exploit the 3m boundary distance at the southeast corner; there is not much space left, but it could be enough.

However, this would have the advantage that the garage might slip back west into the building envelope. If you then rotate/adjust the building body and garage a bit, you will probably also manage without additional effort and save yourself time and costs.

Best regards Dirk Grafe