Damage to neighbor's house or street - who is liable?

You have to check what is stated in the building permit, some municipalities specify who is liable. Your construction company might also have clauses about this in the contract. And usually, the company that delivers must clarify in advance how the access is arranged, but this can also be regulated differently in the contract. The responsible building authority should be able to inform you who is in charge of the roads.

Let sleeping dogs lie can really backfire, especially in such cases.

I drive an 18-tonner up and down, whereby down means empty, of course,

That’s a full eighteen tons on three axles and empty ten tons on two axles – so that can definitely help to leave the second rear axle down even when empty.

I’ll just ignore the poor planning...

One can also ignore the warning signs of a heart attack. L-blocks of this height are a very strong indication of unwise terrain abuse right at the kamikaze limit.

Nevertheless, we are almost certain that the old half-timbered houses there were also built over this street.

They could have been brought to the construction sites beam by beam, with horses and block and tackles.

The responsible building authority should be able to tell you who is in charge of the streets.

In the case of dead ends, usually the local municipality. That is also where the resident's share is highest :-(

We once had a case where it was clear that damage to the pedestrian and cycle path along the entire length of the construction site was unavoidable. The costs had to be fully borne by the client. Before-and-after documentation and on-site inspections included. I vaguely remember that we also obtained corresponding information for the adjacent road. However, since it was a federal highway, the load capacity was sufficient. The access from the town sign was also prescribed.

You have to check what is stated in the building permit; some municipalities specify who is liable. Your construction company might also have clauses about this in the contract. And usually, the company that delivers has to clarify in advance how the access is arranged, but this can also be regulated differently in the contract. The responsible building authority should be able to inform you who is responsible for the roads.

Okay, the building permit is not yet approved but will be examined immediately afterward.

Letting sleeping dogs lie can really backfire in cases like this.

That is why I wrote -for now-. I have very frequent contact with the building authority and am incredibly satisfied with how accommodating, talkative, and purposeful they are there. I just don’t want to ask further questions unprepared yet, especially when I cannot foresee follow-up questions; I like to be prepared so as not to bother unnecessarily. That’s why I’m starting here first, and lo and behold: I’ve already made some progress again. Now I’m waiting for the remaining offers so I can then deal more intensively with the contracts of the candidates in question. Our favorite is a locally based company that was also awarded the contract this year to handle the municipality's everyday matters. So they also know the responsible people at the authority and might be able to give us some information.

We once had a case where it was clear that damage to the pedestrian and bike path along the entire length of the construction site was unavoidable. The costs had to be borne entirely by the client. Including before-and-after documentation and site inspections. I vaguely remember that we also obtained corresponding information for the adjacent road. But since it was a federal highway, the load-bearing capacity was sufficient. The access had to be from the town sign as prescribed.

Before my original post, I hoped that something like this could never be passed down to an individual. You have shown me the opposite, which naturally has awakened my warning bells now. THANK YOU! EDIT:

We once had a case...

By the way, who exactly are “we”?