So the construction project itself was approved by the municipality. Drainage and grounding were not, but according to the LRA it is a private legal matter. The lawyer has issued a removal notice and a ban on entry. We don't even know when and how the pit will be backfilled. I'm just worried that we will still have to tolerate it because he can't ground it any other way or something. But he actually already knew that during the planning....
I also can't imagine that one has to tolerate that. What does your lawyer say about the topic? It is your property, so what if, assuming you yourself planned to build or bury something on that part of your property? He can't just bury his stuff a meter into your land? O.o
He may possibly have received approval for the basement garage, but definitely on his own and not on your property. Go there immediately, stretch a string along the boundary, if construction is indeed taking place on your property stop all further actions immediately. Put everything in writing to the client, the general contractor, the municipality, and the district office, and then go to a lawyer.
Your neighbor is not allowed to place the technical room directly on the boundary, nor lay the ring earth conductor or drainage on your property. I very much doubt that he got approval for that.
The technical room may be on the boundary, at least where built. The things on the other person's property are of course not permitted; depending on your own plans for the area, I would demand dismantling or request compensation.
