Make sure you know where your exact property line is. Get it surveyed, if you have to.
Then wait for Doughboy to finish building his edifice before letting him know it's on your property. I don't know if there is any permitting process where you live, but you should get all your legal ducks in a row before dealing with this loser.
Oh we do. And he does, too. Three of us neighbors, who bound his property, went in together on a survey. Doughboy let us pay for it and he got his corners marked. (did I mention he was tacky??)
This shed is going to be huge- 16x20 perhaps. Practically a small barn. There are two ways to get him on this. 1) He probably needs a building permit and probably doesn't have one. 2) Buildings have to be 40ft from the property line. He's maybe 5ft from the line now. The catch will be whether his minibarn qualifies.
He also removed his silt fence- that black tarp material that builders place around properties to control runoff. Ya only get to remove that when 3 yrs have passed (and you've established a lawn) or a county inspector says you can (which ours hasn't). We're going to be calling county anyway about the whole drainage/erosion problem we have so we might have to drop a little comment or two. Heh heh heh.