The following two sections contradict each other for an outsider:
Our development plan includes a ground floor floor height. Unfortunately, this is below street level. Therefore, we planned to raise this height.
but:
The street is quite short and all houses next to ours are at street level. Only on our plot is this not the case. That would make only our house smaller than all the others. We also wouldn’t have to fill up.
- how can that be? Do you have to dig a hole to place your house deeper to comply with the development plan?
- does the development plan specify a height for each parcel in relation to the street, or absolutely in meters above sea level?
- is the total height measured from the top edge of the street, or from the top edge of the floor? I think the best would be if you take a photo of the text section of your development plan and a photo of the section of your and the neighboring parcels to get an impression.
PS. Probably everyone would react like this if the neighbor wants to build higher than they actually are allowed. Assuming it is approved by the municipality: From the start, you are navigating into a lifelong neighborhood dispute that will eventually call the purpose of a few centimeters more house height into question.