Building construction has become a complex field nowadays. The evolution of science offers multiple innovative options in construction methods, while, new construction materials and electromechanical systems are set to change the building industry. Τα νέα κτήρια πρέπει να εξυπηρετούν τις ανάγκες του ιδιοκτήτη και ταυτόχρονα να καλύπτουν συγκεκριμένες προδιαγραφές This scientific development has increased the quality of studies and constructions, but at the same time, it has elevated the quality requirements. Hence, nowadays, challenge is not the construction of a building that serves part of our basic needs. New buildings must serve the needs of the owner, while, at the same time, meet specific specifications (energy, environmental, spatial, etc requirements). This development in combination with the continuous on-site inspections during the project make it very difficult for an individual to construct a building without any professional help.