Designers Built a ‘Biological House’ From Upcycled Grass, Straw, and Seaweed

The Danish architectural firm Een Til Een has revealed the latest step forward in sustainable housing: the world’s first “Biological House.”

The home was built using materials made from agricultural waste, including grass, straw, and seaweed, and was conceptualized in collaboration with the Danish Environmental Protection Agency. Not only is the reuse of this material healthier for the environment, it also prevents the harmful effects of burning the waste, which is what normally happens to this type of agricultural residue if there is no use for it, according to Curbed. 

“It sounds like science fiction that you can build a house from things such as tomato stems, straw and seaweed, which is just as durable as normal buildings and at the time has a healthy economy and complies with the rules,” Danish Environmental Minister Kirsten Brosbøl said. “However, the Biological House shows that it is possible here and now. I appreciate that way we really get some value from materials that otherwise would end up at an incineration plant.”

In addition to the agricultural waste being used for most of the raw building material—including tomato stems and woodchips being turned into composite boards—eco-friendly Kebony wood was used for the home’s outer cladding. According to Kebony, 40 partners were used in the construction of the home, each with an eye toward sustainability and environmental responsibility.

"Being part of this strategic partnership has been a real privilege,” Mona Gøtske, Country Manager Kebony Denmark, said. “[And] we are thrilled to have provided a façade solution for the world’s first Biological House that demonstrates the strength and sustainable values of Kebony in the best possible way.”

The modular home was built on screw piles, which allows it to be moved without tearing up soil the way a traditional concrete foundation would, as Inhabitat reported. Before it was unveiled, Een Til Een constructed this “Biological House” in secrecy in Middelfart, Denmark. But now that the project has been successfully completed, World Architecture News reports that the doors are open for visitors from all around the world to walk in and look upon the house that tomato stems built.

[h/t Curbed]