Legal Question in Real Estate Law in Kansas

Your Queston is a bit confusing. By saying that he is subletting, you're saying your neighbor is a renter and not an owner. If the common covenants allow for renting of the whole property, it is unlikely that any covenant on your property could prevent the neighbor from renting out (subletting) part of their residence. If this has not answered your issue, you might post again, with a clearer description of the facts.

Good luck