Quotation from the Land Use Handbook from Vermont League of Cities and Towns: 

The Fourteenth Amendment to the U.S. Constitution requires government officials (such as local zoning boards) to provide citizens with due process when depriving them of life, liberty, or property.  Black’s Law Dictionary defines due process as “the conduct of legal proceedings according to established rules and principles…including notice and the right to a fair hearing ...” Thus, at a minimum, the U.S. Constitution requires local zoning boards to provide citizens with orderly proceedings, adequate notice, and the right to a hearing.