This is the fourth book of the series “Technical applications of administrative law for lawyers and engineers”. It focuses on traditional settlements and examines, among others, 19-10-1978, 02-03-1981, 24-04-1985, 25-05-1985 PD ..., which lay down the rules concerning traditional settlements and examines them from the perspective of both a jurist and an engineer. The first part of the book analyzes the various concepts of the different types of settlements and the administrative bodies that implement the pertaining procedures, whereas the second part is dedicated to the technical application of the aforementioned rules (i.e. which construction works are permitted, the permitted land uses, how constructions without building permits are etc.)