Divide and reunite plots of land?

Hello everyone,

we are planning to build a semi-detached house together with my wife's sister. (Yes, we get along VERY well, we have long thought about the disadvantages of a semi-detached house)

Our actual "problem" is the following.

We live in a rural area. The plot on which the house is to be built is about 850m². Directly adjacent to this plot is the parents' property, which is very large. Since we would like to have a big garden and the parents would be willing to give us a part (about 300m²) of their property, the question now arises whether and if so how this could be implemented in a cost-effective way so that both semi-detached house owners are treated equally.

As a layperson thinking about it, the parents' property would first have to be divided, then merged with the other plot, and finally divided again according to the two semi-detached houses.

I have sketched this out visually.

Would something like this be realistic or are there other ways to implement it?



Thank you very much and best regards!

That actually works relatively simply if you all already own the plots: hire a surveyor, tell them exactly where the new boundaries should run. The surveyor then creates a continuation certificate, then with all involved owners (so you, your sister-in-law, and the parents-in-law) go to the notary, who will then notarize it accordingly. It gets interesting if there are already or still encumbrances on the plots such as pre-emption rights, easements, or land charges. But for that, more information would be needed.

Whether there are any charges, we do not know yet. Also not whether there are certain construction windows or such.. I wanted to first clarify whether it is even feasible the way we had thought. Sounds definitely not bad at all. Thanks!

Is it intended that the boundary between the semi-detached houses runs diagonally, or is this due to "artistic" reasons? Where is the street? Is the lower plot developed?

Where is the street? Is the lower plot developed?

The question is important. How is the access to the intended semi-detached house planned? If it should come from the parents' street, then much of plot 2 will be sacrificed for the access.

The access is to the south, so from the sketch, it is to number 3.

My drawing has nothing to do with planning; it was just to illustrate how the division of the property might be roughly conceived.

The lower property is developed, yes.

We are still at the very beginning and have not even seen a development plan or even know whether a semi-detached house is allowed here at all.

I first wanted to understand whether this would even be possible in terms of property division. What kind of costs can be roughly expected here? Is there any indication?