We could be your neighbor ;) On the one hand, we planted a hedge, carefully respecting the allowed distances. Unfortunately, our neighbor has rarely been home... and when he is, he doesn’t always find time to mow his lawn. Unfortunately, the result is that his lawn keeps growing further onto our property. We have now set paving stones as a boundary, and when my husband mows, he also mows 29cm of his lawn. However, we make sure he is not there. This achieves damage limitation because he approaches the matter of the boundary somewhat indifferently. Since he doesn’t care about our side of the hedge either, it is cut from his property. We also pull weeds on our side, which we wouldn’t have in such quantities if he ever did anything. In this respect, he is glad when we do our thing and thus have no demands on him. By the way, like you, he has every freedom to install his own hedge or fence. But he doesn’t for the same reason as you: the costs and later effort. Why do owners actually get weird? :)