The need for healthy homes has hardly ever been more apparent than during the current global condition. The current efforts to reduce the negative impacts of buildings are inadequate. Therefore, the built environment must be designed in a different way. To bring regenerative, collective habitation to all scales of development, Amsterdam architecture practice GG-loop, sharing the vision with Arup, is developing Mitosis: a modular building system created by a parametric design tool following biophilic and user-centric design principles.