That would interest me too. Here we almost exclusively get plots of land with leasehold interest. We will probably get one from the Catholic Church. Here too, development costs are likely to be due when the leasehold contract is concluded. The following should be considered. Often many obligations of the landowner>> are transferred to the lessee. Many municipalities charge fees to the adjacent landowners for road expansion or renovations. These are often >10,000€ and could possibly be passed on to you. In a new development area, this will probably only be the case in at least 20 years because everything is new at first. Nevertheless, check the leasehold contract for corresponding clauses. And: Never say never. Acquaintances of ours had a leasehold plot of the church and were then offered to buy it after about 20 years. At what price and to what extent the already paid leasehold interest was credited, I do not know.