The seven-year boundary rule in the UK means that if someone has been using a piece of land as their own, unchallenged, for at least seven years, they may be entitled to claim ownership of that land.
So, if you’ve been using someone else’s land for at least seven years, and they’ve done nothing to prevent you from doing so, you might be able to claim the land as your own.
This UK law can also apply to garden fences and hedges.