It’s hard to give a quick answer to such a complex question. First, understand there are four key factors that affect building cost: (1) Complexity of the design – the more complicated the building design, the more expensive to build, (2) size – No surprise here, the bigger the house, the more it will cost, (3) location – a property near the seaside will cost more than a property located in a village near the White Mountains, and (4) quality of the structural and construction materials.   Generally, the larger the construction, the less its passive elements will impact the budget. A big detached villa will be approximately 10 % percent more expensive to achieve passive house standards. However, it could be much more affordable because of the continuous improvements in construction materials improvements.   Generally speaking, the number that’s usually quoted is that it costs between €1,400 to €2,200 per square meter of building in Crete. Given that an average three-bedroom villa in Crete measures around 200 square meters in all, you’re looking at about €260,000 for the full, unfurnished build.   You can discover more about these costs at the Passive House Construction in Crete, Greece section.