You are right, in large rooms that are divided, there are often also 2 heating circuits and under doors. The protective pipe is already provided by the plumber.
Now the other end-terrace house has also filed an objection against the building application, as with the current foundation depth it would end up in their gravel bed of the basement floor slab. Their civil engineering documents were also available to him.
Exactly - we have also officially registered our concerns. However, he was already aware of this. He will now have to rearrange plans if he wants to build cost-effectively.