Climate change requires adaptable buildings with dynamic systems. The Envelope of The Day (EOTD) living lab enhances building adaptability, reduces carbon footprints, and prioritizes human-centric control using reusable or compostable materials. Located within an existing dorm building footprint, it includes organizational changes and new programs. The first two floors house a research lab, dining hall, seminar rooms, and offices, while upper floors feature apartments, lounges, study pods, and terraces. These additions improve the student experience and enable testing of diverse spaces for the living lab. Lounges double as a "material wardrobe" for the building. A dorm mobile app integrates a user interface, providing each occupant with a control panel to manage their envelope based on comfort needs. The panel offers suggestions on envelope operation, material changes, placement, and availability, while collecting user feedback for researchers to evaluate envelope performance and identify improvements.