Della OS is a comprehensive smart-building operating system that aims to integrate various property management systems for the benefit of integrators, operators, and residents alike. This innovative platform enables building owners to efficiently onboard or off-board residential units in mere minutes while managing essential elements like access control, smart locks, thermostats, intercoms, CCTV, and other subsystems from a centralized interface. Its user-friendly dashboard seamlessly connects with property management solutions, provides customized resident applications, facilitates event organization, maintenance tasks, and features packaged modules that include leak detection, Wi-Fi HaLow connectivity, and smart living capabilities. The advantages of adopting Della OS include the potential for significant savings of up to 35% on HVAC energy expenses, a reduction in vendor fragmentation through platform centralization, and an enhanced living experience for residents by consolidating control of smart devices, amenity reservations, and communication within a single app. Emphasizing swift deployment, the system boasts installation times of just minutes and accommodates a range of users, from mechanical and electrical integrators to owner-operators and residents. The streamlined approach of Della OS not only optimizes building operations but also fosters a more connected and efficient living environment.