Yes, it may well be that the claims increase with high land prices. Part of it is probably also value retention. A simple house with minimal equipment for 800,000 euros with a towel garden is simply unsellable. Anyone who invests or goes into debt that much wants better equipment than in a rental. With sharply rising rents, everything is built to the maximum and accordingly the order numbers are full.
But in house construction, labor costs are probably the biggest driver, a current example is tile laying 60 euros/sqm net without tiles, with substrate preparation, tile skirting, etc. + 30 euros for tiles, resulting in approximately 140 euros gross per sqm for our 100 sqm tiles.