When David Westervik left the Norwegian coastal city of Bergen to study architecture in Aarhus, Denmark, he decided to live in a small sailboat to save money and sail across the North Atlantic.

David used his boat-living experience to self-build with his partner Alessia a modular home as cozy and compact as the boat. The home is also capable of growing food and staying warm during the cold winter months of Denmark’s Jutland. David used plywood and scrap materials to CNC-cut the structure, which cost the couple around 200,000 DKK (Danish Krone), or around $30K.

While writing his thesis on self-built architecture that can be easily moved and scaled, David came up with a modular system that can combine a scalable living space with a greenhouse that, in cold Scandinavia, serves as both an organic garden for food production and an indoor sunroom.

His GroHuse modular concept is inspired in the experience building their home: A small home that can be moved in necessary and easily adapted to different life stages, produced with non-toxic materials and ready for the most demanding climates.