KfW BEG funding stopped 261, 262, 263, 264, 461, 463, 464

Such an emergency braking overnight would not have been pulled off by Altmaier. Take the Baukindergeld from the previous government, everyone knew about the flood of applications and that the level in the funding pot was steadily decreasing. Those who come last might possibly end up empty-handed, so there is a need to hurry – all good.
But what happened on Monday, dear , came without any warning and even stunned seasoned industry experts.
If anyone was asleep at the wheel, it was Habeck, who overnight put tens of thousands of young families, property developers, etc. in front of a fait accompli.
Only someone who himself was taken by complete surprise reacts so abruptly. As a minister, a very unfortunate performance with devastating consequences.
Allegedly, money is not supposed to play a role in climate protection. Now everything is being blamed on the money and people are building again according to the Building Energy Act.
The public’s trust in politics took a severe hit on Monday. Habeck is responsible for that.

What do you think, how are such figures transmitted from the KfW to the ministry? During a change of government? And how long then does such a decision-making process with impact assessment take?
You could, if in your opinion it was known so precisely, better point to Lindner, who "only" loosened 6 billion more to cushion the flood. Why didn’t he transfer 40 billion right away?

The trust of the population in politics took a severe hit on Monday. Habeck is to blame for that.

Beware of generalizations. The vast majority of the population probably couldn't care less about this decision. ;)

The entire process is a formidable steaming pile of political crap. The communication after the announcement even more so. But reflexively screaming "that was Habek, he hates single-family houses!" is simply factually incorrect. It also doesn't help the situation that most prospective builders are already gasping for air due to inflation and rising construction costs.

Yes for this, except for the fees, which I don’t find particularly high. I just looked them up again for this answer (please excuse the formatting, I can’t get it better quickly out of my Excel table):
Real estate transfer tax €5,162.50
Notary costs €1,335.66
Entry of mortgage in the land register €347.00

I don’t have the table here at work... but for me it should be around €3,500, of which the entry of the mortgage (400k) alone is almost €2,000. That’s exactly what I find simply outrageous. You can still argue legal advice for the purchase contract, but the mortgage is essentially just stamped once and that’s it.

To reinterpret this now as if builders nowadays decide on the KfW standard one way or another and would voluntarily spend money for the climate even without perks, is like believing you can fish just as well without bait.

I think you underestimate some people here. Whether out of ignorance of the actual savings, or as a status symbol (“we only built the best”), I am convinced that quite a few would still build to a higher standard.
Of course, this is always also a question of the house and the builder involved. Some houses can be relatively easily upgraded to a higher standard, others not. Some companies calculate the higher standard according to actual costs, some like to milk the customer (I looked out of interest once again, Schwörerhaus back then wanted nearly 18k from us just to upgrade the wall from 55 to 40, perimeter insulation of course provided by the builder). Some only offer one wall, Weberhaus, for example, had only the EH40 wall and no thinner one for EH55.

Be careful with generalizations. For the vast majority of the population, this decision is probably going to be of absolutely no concern. ;)

Even parents and grandparents of the affected young families won’t be too thrilled that overnight their children’s, grandchildren’s, and great-grandchildren’s home financing was wrecked. Of course, this has wider implications and makes one think about how reliable this government is, especially the Greens.
The solar panel provider won’t be too happy either that cancellations and delays of uncertain duration are now pouring in. Photovoltaics without a house are rather impractical. ;)

Although 20 billion per year were squandered, the cheerfully heating grandmother was clearly not motivated.

Have you ever critically questioned these 20 billion euros? Here one must distinguish between loan volume and subsidies. Please calculate yourself how many houses would have to be built to "squander" 20 billion. The government throws out a figure and everyone is amazed without doing a cross-check.