4 Earth 2 Mars Holding B.v.

4 Earth 2 Mars is developing Circular Architectural Techniques (CATs&DOG®) to radically improve how we design, produce, and build habitats—on Earth and on the Moon. We are tackling the ABC crisis: Affordable housing shortages, Biodiversity loss, and the Climate crisis—by creating a system that empowers local communities to build sustainable homes using local materials and minimal resources.

Our innovation uses circular Design, Origami, and Geometry to simplify construction into just two reconfigurable building blocks. The system is modular, adaptive, and highly scalable—equally suited for slums on Earth and lunar settlements.