This report examines the increasing deployment of landlord technologies in San Francisco (SF) housing and the problems this creates and intensifies. These technologies include tenant screening, facial recognition, closed-circuit television (CCTV) cameras, and other algorithmic, biometric, and app-based building access technologies specifically designed to be deployed in tenant housing and surrounding public and private space. As researchers with the Anti-Eviction Lab and the Anti-Eviction Mapping Project, we map the genealogies and geographies of these surveillance systems, looking at intersections of surveillance, carcerality, and gentrification.