Property lines are often marked with metal pins buried at the corners. You can rent a metal detector (or borrow one from your local library tool-lending program) to find them. If the fence aligns with those pins, you’ve got your answer. It’s like a low-stakes archaeological dig.
If you’re feeling extra, hire a land surveyor for about $500. That’s a small price for peace of mind—and for proof to wave at your neighbor when they claim your hedge is theirs. Just kidding… mostly.