Construction costs are currently skyrocketing

That will simply lead to wealthy people buying entire semi-detached houses or rows of terraced houses and living in them with their families. I don't think much of a radical libertarian attitude as some apparently have here, but I also believe that only things that are truly immediately harmful to society should be absolutely banned. For everything else, regulations and taxes are enough, or conversely subsidies for what one wants to promote (but with moderation and caution!).

Why should the state decide who is allowed to build what?

I wouldn't know in what way "the state" decides who is allowed to build what in Münster. Usually, this is done by the local administration.

Because currently a party in the government wants it...

A quick fact check on who is the head of the administration (=Mayor) in Münster: Markus Lewe, CDU.

People, seriously, the populist cudgels that some are wielding here have always been the very bottom of the barrel. But slowly this is genuinely becoming even more unfathomable.

Quick fact check on who is the head of administration (=mayor) in Münster:
Markus Lewe, CDU.

We have this CDU clown around here, local politician and boomer all in one. Regularly complains about the bad, bad traffic light coalition, on topics where the traffic light coalition hasn't even had their hands on the wheel yet. When you ask him who has driven the cart into the wall at the state level for the last 16 years, there's nothing but test pattern noise.

idR. makes the administration on site.

...which in turn is also part of the state.

The regulatory frenzy of those politically responsible is currently increasing more and more.

A few days ago, I wrote here that citizens are being treated like little kindergarten children. But that is just the way it is.

Every day, new subsidy vehicles have to be invented because there are such distortions in the markets that continue to undermine the market. The path to a planned economy has long been paved.

This has nothing to do with populism; it is reality.

Now, for example, when they realize, oh, the industry can no longer afford electricity, they want to subsidize the electricity price for the industry.

Recipients of [Bürgergeld] are to be exempted from the heat pump requirement. Subsidies (subventions) for heating systems. These will certainly make it much more expensive.

Gas and electricity price caps, rent price caps, CO² participation of landlords, extremely complex heating cost statements, compulsory photovoltaic systems in new buildings, ban on wood heating systems, ban on gravel gardens, just to name a few examples.

It just keeps increasing, and one subsidy triggers another somewhere.

And the low interest rates of recent years were also a huge subsidy by central banks, triggered by political influence on them. Today, we can clearly see the distortions this has caused. The inflation spiral is a consequence of this.

Süddeutsche is also getting worse and worse in terms of text quality. Detached single-family houses are being abandoned. Semi-detached houses and terraced houses are still being planned.

Doesn't really make it any better either or

Well, the question is what happens with existing plots, is it still allowed to build a new single-family house on them or is there also a mandatory requirement for densification? (Actually, you can't do that...)