Primordia is a collective housing response to the formation of new coastal biomes caused by rising sea levels through a permeable blending of built and natural environments. Residential hubs form a series of collective communities that embrace their literal connection to the ocean through aqua-cultural farming, fresh water procurement, and wastewater recycling. The project is organized by two systems unified by the principle that a community must be allowed to grow in place. Adaptable units expand and contract relative to the number of tenants in residence, allowing for a comprehensive multi-generational living arrangement. Public infrastructure works in tandem with the growing population through a continuous expansion of food, water, and energy programs. By working in tandem, these systems allow for both long-term growth and stability in the creation of a new coastal collective.