My question involves real estate located in the State of: New York

This fortunately doesn't concern me, but my neighbor. His other neighbor is building a new house, which happens to be 3' over the property line, rather than 15' away as required.

What remedy is there to this? Obviously he can demand compensation for a loss of value to his property, but what if he isn't satisfied with that? Can he demand anything else? (seems absurd to ask that the house be removed, but if it were my yard...)

Presumably this is a pretty serious violation of the building permit; could he even get a certificate of occupancy for it.

My only involvement is that he hasn't given any thought to getting electric to his new house, but can only get it if I give him an easement. Not real good planning to build the house first.