Based on LTL Architects’ recently published book Manual of Biogenic House Sections, this lecture presents a visually compelling argument for rethinking the material basis of architecture in a time of environmental crisis. Asserting that the most viable means to radically reduce embodied carbon in new buildings is to use plant and earth-based materials, the lecture and book demonstrates how this approach can catalyze new types of houses that reduce or sequester carbon, engage regenerative life cycles, and create healthier spaces for living. Interlaced into the talk are reuse and biogenic projects designed by LTL Architects. In particular, the lecture will explicate fi ve small houses that use biogenic material assem-blies as a catalyst for building form, domestic organization, and spatial seduction. These proj-ects demonstrate our optimism about architec-ture’s agency when embracing biogenic materi-als in the move towards a regenerative future.