Terraced house on a 240 sqm plot - fundamental questions / feasible?

Moreover, even within the building authority there was disagreement as to whether a roof terrace with a max height of 4m may be built on the garage, or whether the state building code applies, according to which only a max height of 3m is allowed as boundary construction. This is still being clarified because the development plan itself actually contradicts itself here.

I personally do not want the neighbor elevated on the roof terrace looking directly over to me at the corner of the house.

What contradiction is there in the development plan? Surely only can say that in this forum: a boundary building privilege usually applies only to the garage itself and a terrace would have to observe the boundary distance - however, in the case of the terraced house, we are talking about a closed construction method, which in this sense does not allow any lateral building setback within the group of houses (and accordingly no height restriction of the boundary building as such). I would therefore see the balustrade of the terrace as definitely allowed to reach up to the eaves height.

I don’t really like it either, but at some point you have to make compromises and put together the best overall package with the given budget. I would also prefer a 180 sqm single-family house, 600 sqm plot, and an unobstructed view But for that, I would have to invest around €1 million here in the region, which we neither want nor can...

...basically, several people in the area have already built a cellar directly onto the neighbor’s garage, without anything major going wrong.