Construction costs: Single-family house in Baden-Württemberg 2019 (KFW 40 plus)

Well, calling 230sqm a small house also misses the reality of most new builds.

I wouldn’t call 150sqm with a finished basement large. To me, it’s more like a condominium character.
But well, to each their own...

The cost per sqm for a KFW 40 plus house has already been researched by the OP himself and he has come to the realization that it will cost him about 2500 EUR. If it makes him happy, he can also expect 2300 EUR. But I don’t think it can be much cheaper than KFW 40 plus with complete external contracting on a slope.

Yes, why is that? Because then Schwörerhaus, Weberhaus, or whatever they’re all called, can sell their overpriced photovoltaic systems and other gimmicks, like e.g. storage, that nobody needs.
I can also have the photovoltaic system offered separately by the local electrician for half the price.
And the 15k subsidy is then simply offset against the house price. ))
Already experienced all that...

150 sqm with a finished basement I would not call big. To me, it has more of a condominium character. But well, to each their own...

...Dude!!! Seriously???

I wouldn’t call 150sqm with a finished basement large. To me, it rather has the character of a condominium. But well, to each their own...

I haven’t heard such remarks about 230sqm of heated living space very often lately...

...Dude!!! Seriously???

Sure, our current apartment is 140 sqm, I don't think that's big. Many in our neighborhood build over 200 sqm. I'm not the exception.

But well, what else should one put on most plots of land averaging 200-300sqm...

I've rarely heard such remarks about 230sqm of heated living space lately...

I'm more concerned with the enclosed volume, not the heated area.