We have run into a problem getting a build permit from the City. Apparently there is a rule that you can't build a structure across a property line, even if you own both pieces of property, even if there was already a house built across the line before, even if the pieces are taxed and assessed as one unit, and even if you asked them months ago if there would be any problems building there and they said "no."
Actually, we can build across the line if we pay a bunch of money and file a document that says the obvious boundary is also the actual boundary. Seriously. This will take about three weeks.