This study proposes the concept of a “care wall,” redefining the conventional residential wall as a living environment connecting residents’ daily lives with community care, and develops a user-centered design process. Residents’ daily behaviors, inconveniences, and facility needs were investigated to inform design develop and evaluation. The results identified repeated entry and exit, diverse walking and resting behaviors, facility-related inconveniences, and needs for emergency bells and parcel boxes. These findings were translated into three care-related environmental requirements: recognizing changes in daily life, supporting safe movement and physical stability, and responding to behavioral anomalies and daily service needs. The requirements were embodied in physical design elements and refined through on-site prototype testing. Based on these findings, this study proposes a care wall development process that translates users’ living contexts into environmental care requirements and physical design elements.