Ground floor raw floor height (single-family house) / Meaning - Impact?

Hello everyone,

I hope someone can help me. We want to build a single-family house in Baden-Württemberg and are having trouble with the B-Plan...
The following is specified in B-PlanA:

The ground floor raw floor height (single-family house) is set according to the heights entered in the plan (Attachment 1) referenced to Normal Zero Height (NNA height). Deviations of +/- 0.20 m are permitted. For staggered floors, the set single-family house height applies to the higher level. The max. eave height is 4.00 m. The lower reference point for measuring the eave height is the single-family house, the upper reference point is the intersection of the outer wall with the top edge of the roof covering. The max. ridge height above the single-family house up to the top edge of the ridge tiles is 7.50 m.
In the attachment (for our plot), the single-family house is specified as 911.90 m.
Now the surveyor was here and determined a max. height of 911.30 m on the property. In the building window, the max. height is 910.95 m.
Questions:

[*]We had planned a single-family house with a ridge height of 7.50 m and had only a knee wall of 0.80 m (the ground floor was 2.50 m high). Can we actually build the house higher now (higher knee wall), since the NN point is 911.90 m and we are basically building about one meter lower?
[*]What does "For staggered floors, the set single-family house height applies to the higher level" mean?

Best regards
Thomas

Can we factually build the house higher now (higher knee wall)

No.

and can we actually build about one meter lower?

You are not allowed to. The height of your ground floor raw floor must be between 911.70m and 912.10m above sea level. From there, the 7.50m up to the top of the ridge counts.

what does "Bei höherversetzten Geschossen gilt die festgesetzte Einfamilienhaus für die höherliegende Ebene" mean?

This probably means split-level, i.e. a height offset of up to 1.5m within one storey. Without plans and knowledge of the height conditions on the property, however, it is difficult to assess.

No. You are not allowed to do that. The height of your ground floor raw subfloor must be between 911.70m and 912.10m above sea level. From there, the 7.50m up to the ridge top counts.

Actually, we do not want to "fill up" the plot to 911.70m...

This probably refers to split-level, that is, a height difference of up to 1.5m within a single floor. Without plans and knowledge of the height conditions on the plot, however, it is difficult to assess.

Attached is a section from the "height map"

The information in the development plan has nothing to do with the surveying. The floor must be at 911.9 +- as described and 7.5 relates to this.

A basement is recommended in the development plan, which extends one meter outward.

What did the surveyor determine? Max 911.30 will be the measured height. So status quo. This has nothing to do with the reference height in the development plan. You also don't have to fill the plot, only the single-family house must be within the specified range. Just as an idea... The topsoil is still on it, though?

You don't have to fill up the plot either, only the single-family house has to be within the specified framework.

With the development plan, a basement that sticks out one meter is advisable.

That's right. Filling up is nonsense here.