What do you have in mind? You will find it difficult to forbid him from building the basement.
That is not my goal at all. If I felt that we were being involved in the planning of the underpinning and that we could then have it checked by our general contractor, everything would be fine. But casually throwing that at me today during a chance meeting is not the way to do things.
I will now have it examined whether we, for example, have the right to have an expert’s survey of our house carried out at his expense or something similar.
He just doesn’t understand that this is already a serious intervention on our property and house. I had given him every opportunity to resolve the matter reasonably, for example when I suggested a deeper foundation to his later basement depth before our construction started – no response.
My priority now is to protect my building.