There is quite a difference between a passive house and zero/plus energy buildings: The focus of a passive house is on energy efficiency while Zero/Plus energy

There is quite a difference between a passive house and zero/plus energy buildings: The focus of a passive house is on energy efficiency while Zero/Plus energy buildings try to have a positive net value. While it certainly helps, energy efficiency is not required for a zero/plus energy building: You just have to produce more energy than you consume. Regarding the building cost: As far as I know, the building cost is not greater compared to that of a normal building.