The lot next to ours has just about finished all their dirt work. We hope we'll be starting within the next month or so. Because we are both adding a few feet of elevation, I wonder if it might be helpful to have a chat with the neighbors-to-be about the grading between our homes. How much is reasonable to know about someone else's plans? Is this something our building inspector/permit giver/guy who does everything in our smallish town will know about already and discuss with us when we go for plan review? We want to be good neighbors, and so we've discussed drainage with the existing home on the other side since we'll be 3 feet higher than their home.

Has anyone ever had this kind of discussion/arrangement? We do know the family (our kids are in sports and school together). Any tips or words of caution?