The idea of building your own green home from start to finish can be a daunting one, especially because a lot of eco-friendly design can be pretty expensive. But the Guardian recently featured a cheap and really quick option: a German company called Meisterstück Haus creates pre-built panels and pieces for your house, and builders can put it all together in just 3 days. That doesn’t include the time it takes to add plumbing and electricity and everything else you might need in a home, but it’s still pretty impressive, especially for a 3-bedroom house!

The houses are made of sustainable materials and insulated to be air-tight, which can drastically cut down on heating consumption and costs in the winter.

Is your house eco-friendly? How?