House purchase: Sale before the expiry of 10 years - Right of first refusal

In both cases, the deadline according to the Building Code 469 is two months from receipt of the purchase contract. In private matters, a different deadline can be contractually agreed upon. The problem here is also that the entitled party must first be found if there is any doubt.

In the law, it is actually the other way around. One has two months to exercise the right. If one does not do so by then, this is considered a waiver. Of course, one can also explicitly declare a waiver beforehand / but one does not have to.