The new houses in my neighborhood were all built 2017. There are 120 units in 2 styles: houses and semi detached houses. They all look identical and they were all built with a lot of economies of scale.
The price 2015 was: 500.000 Euro for the semi detached units.
The price 2022 is: 1.3 million.
The neighborhood did not change, the infrastructure did not improve. Nobody can explain you a logical reason (except of EcOnOmiNCs) why the house price exploded. Fine, some construction risk was prices in, let's be it 10%, also risk of default and other factors 10%. That explains 650k.
My boomer parents came, watched and complained: terrible houses, all look same, no garden, no basement, tiny garage, too close to the neighbors. They bought their house back than for 230k!
And there was this amazing time in Germany where prices for houses did not increase. They stagnated and even slightly dropped - which is intuitive as the house is getting older and less attractive!
The American crisis 2008 destroyed everything and it's incredible that until today we are not pointing towards those who's fault it was.
tldr: houses can be build with economies of scale, prices are up because of American politics 2008+