Build a terraced end house with an additional unit (GÜ) on your own

Maybe the neighbor is just bluffing. Send him the address of your gu and hold back.

The alternative is to build without a basement.

It may now also be possible that underpinning is no longer technically feasible, since normally the foundation is excavated down to the excavation depth and then at least a slope of 50 cm (or even more) must remain. This slope was still there during last year's excavation - however, it has been significantly cut away this year, so that possibly the fundamental conditions for safe underpinning no longer exist. I will clarify this with our general planner.

Maybe the neighbor is just bluffing. Send him the address of your general planner and hold back.

I like to keep control - that is absolutely not an option.

But what other alternative is there? After all, this is at least the solution you wanted from the start.

We wanted that in the conciliation hearing because we were interested in prompt construction. He quickly rejected that option back then and did not want the deal as part of the conciliation hearing, so our willingness to negotiate has since been somewhat overstretched.

I definitely do not want to keep holding the reins any longer - that is absolutely not an option.

And how do you intend to accomplish that? Do you want to become the client? What happens if he doesn’t pay, you are liable, etc. I would expect anything from your neighbor.

And how do you want to accomplish that?
Do you want to become the client? What happens if he doesn't pay, then you are liable etc. I trust your neighbor with anything.

Something like that can only be done in the name and on the invoice of the neighbor – possibly even with prepayment. Above all, the liability issue would have to be clarified if damage occurs due to settlements. I would have that recorded in a contract, possibly even notarized.

That could then only work within very narrow limits.

However, that by no means means that the rest of the construction phase will run smoothly. Now he wants something from us and is even willing to talk once – almost a year ago he wasn't. For example, things like compensation for the excavated terrace, the additional costs of the now more difficult garden design since all neighbors have done the gardens, who will do the roof connection, what about the crane work (swinging over occupied buildings with loads is not allowed), etc.

This time I'm not going to let anyone piss on my leg again!

That doesn't sound like solutions. How much time has passed now? What does it look like next door now? Would you like to post a photo of your right side of the house?

Take your time first to check whether you are even legally obligated to talk to him. After the corresponding legal review (at his expense?), I would grant him exactly what you definitely have to allow and not a grain more, and only with appropriate guarantees (secured by third parties!) and with every possible detail already documented in writing in advance. For example, I wouldn’t care about a crane either if it’s unusable for any reason; he’ll just have to come up with something else. It’s not your problem but his who carries what up where. I suspect you currently have the bigger stones to throw and can make corresponding demands, which for me would also include outstanding issues like remedying the excavations. If you’re lucky, he’ll run out of steam on the way and you’ll still get a decent neighbor; if deadlines are missed, fingers crossed.