Not that long ago, KfW 55 was an unaffordable fantasy. Now it’s standard and being built less often?
Something is getting mixed up here
Energy Saving Ordinance 16 = KfW70, not 55!
The next Energy Saving Ordinance will then be KfW55, 40, or 40+. I’m guessing 40+, since with the mandatory smart energy control you can effectively show with colorful animations how economical a house currently is. Otherwise, not much changes. KfW55 is only complicated if you (like us) want to stick with a gas boiler. That just requires a few more centimeters of insulation & a controlled residential ventilation system. If you replace the gas boiler with an air-to-water heat pump in a gas-heated & controlled residential ventilation-ventilated KfW55 house, you almost automatically have a KfW40 house. Photovoltaics on the roof, battery in the technical room, and an iPad on the wall, and it’s already KfW40+.
Many builders are installing photovoltaics anyway these days.
For prefabricated house providers, it’s not an issue at all (Streif Haus, for example, advertises anyway with: "every house with us is KfW40").
The shell builders just have to adjust, because with monolithic, single-shell construction it won’t be that easy anymore. 24 cm Ytong Town & Country houses will be definitively history. But you don’t necessarily have to be sad about that.
PS. Building is becoming more expensive year after year.