And once again, fake news are being spread by the usual suspect. The single-family house is not being banned in Münster; it only takes a back seat in future development plans. This means future development plans will only allocate few building plots for single-family houses and more for semi-detached houses and terraced houses.
And that makes sense, because otherwise a few wealthy people would buy up the building plots from those who cannot afford a single-family house with an 800m² plot, but only a semi-detached house with 400m² or a terraced house with 200m² plot.
Because one step to make building more affordable again, especially where land is insanely expensive, is to reduce the size of the plots. And that only works with semi-detached or terraced houses.