https://www.constructionsantorini.com/de/2026-07-30weekly1.0https://www.constructionsantorini.com/assets/img/cave-houses-santorini-1400.jpgCave houses cut into the volcanic rock on Santorini, showing the yposkafo building stock that most renovation work on the island deals with https://www.constructionsantorini.com/de/about2026-07-30monthly0.6 https://www.constructionsantorini.com/de/for/overseas-owners2026-07-30monthly0.8 https://www.constructionsantorini.com/de/for/foreign-buyers2026-07-30monthly0.8