Set up the neighbor's construction crane in front of our house?

Hello everyone ‍♀️,

I have a question for everyone who is familiar with building law. I was told that the owners of the neighboring house (large multi-family house) will soon start expanding the roof. Building permission has been granted, we had no objections, everything was fine so far. Now, for about 2 weeks a container has been standing in front of our house (sidewalk), even though there is enough space in front of the neighboring house. That is fine so far, the business in our house has not complained about it. But now I have been told that at this spot, where the construction container is now, the construction crane is also supposed to be set up. That means directly in front of our multi-family house with business. The construction crane would stand right in front of the shop window of the business. The purpose, or why it is supposed to be like that, is completely unclear to me. We were not asked, have received no information about this. The neighboring house also has 2 businesses on the ground floor. Could it be that the owner does not want to disturb his commercial tenants and therefore simply places everything in front of our house and business? Is he allowed to do that just like that? Is there any legal recourse here? I do not want any trouble with the neighbor. We will soon be renovating all balconies and have to place parts of the scaffolding on his yard because we have an extension on the house and the load of the scaffolding must not rest on the building or the wall there. As far as I know, the hammer blow and ladder law would apply here. We surely have to inform the neighbor anyway and obtain permission for the scaffolding from him, right?

We do not know the owners of the neighboring house. I think it is a community of heirs. How should we proceed now? Just silently accept everything? Could claims for damages possibly be made by the business against us if the crane negatively affects the business? So many questions, sorry
Best regards, Chinchok

The containers are now on the sidewalk and the crane is supposed to stand there as well? If so, I don't think this is possible without the approval of the regulatory authorities. I would also look for a contact person there, unless the client is unknown or not reachable. How long are the construction works supposed to last?

Do you rent to commercial businesses?
Somewhere, construction vehicles will have to be parked, I assume. Whether they stand in front of the shop windows or the crane, in my opinion, makes hardly any difference...?
Apart from that, Grundstück., that they need a permit and security for the use of the street, but I can’t imagine any claims on your part that such a permit should not be granted.

Yes, the container is on the sidewalk in front of our house and the business. Our property extends about 1.70 meters into the sidewalk. Then the public traffic area begins. It is a bit complicated. We also have a basement entrance in front of the house that belongs to the business. The container was placed there without our knowledge, but no tenant has complained to us about it, so we didn't know. I went to the site yesterday to get a personal impression of the situation.

The house is located in the city, our house is also a multi-family house with commercial space on the ground floor. Like almost all houses in this area. It is all a big mystery to me, especially since we were not informed about the start of the construction work. And why is everything set up in front of our house instead of in front of the house where the construction measures are being carried out?

If a permit from the city exists for the installation or use as a storage location for the public area, no one else needs to be asked.

The only thing you can do is ask the office to check whether the neighbor has complied with the regulations during installation, because you believe he has not complied – whether this is true or not is initially irrelevant. This must be checked. If a violation exists, the neighbor must make corrections and nothing more.