At least in the EU it is in the process of being mandated: https://ec.europa.eu/energy/en/topics/energy-efficiency/energy-performance-of-buildings/nearly-zero-

At least in the EU it is in the process of being mandated: https://ec.europa.eu/energy/en/topics/energy-efficiency/energy-performance-of-buildings/nearly-zero-energy-buildings https://ec.europa.eu/energy/en/topics/energy-efficiency/ener... The actual implementation is left up to individual countries. In my country, Lithuania, it means from 2021 all new houses require insulation to be at the same level as Passivhaus, and buildings to obtain the majority of their energy from renewable sources (so most new houses will have PV installed). It gets cold here in the winter (-20c isn't uncommon), so if it can work here, it can work pretty much anywhere in Europe. As can be expected this will push the price of new builds up, but the benefits are a more comfortable and healthy environment (I grew up in drafty & moldy houses in the UK) and lower energy costs (grid-tied PV installations, without a battery, usually pay back in 7 to 10 years, after which they provide free energy for the life of the system). Edit: I should mention the prices will not rise in a significant way. Materials for the structure/building envelope are usually a small part of construction costs, and those required for Passivehaus are not expensive or hard to obtain. Of course propery developers will complain, as the extra cost will come out of their profit margin :-)