Yeah, property lines can be surprisingly tricky. Even official city maps aren't always spot-on—I found discrepancies when comparing my survey to the county GIS website. Best bet is usually a professional survey if you're unsure... saves headaches later.
I've found professional surveys helpful too, but they're not always foolproof. Last year, we had one done for a community garden project, and even the surveyor's measurements ended up conflicting slightly with older city records. Makes me wonder if property boundaries are sometimes more fluid than we realize, especially in older neighborhoods. Maybe it's worth considering collaborative agreements or easements based on mutual understanding instead of solely relying on surveys... food for thought anyway.
