This Recommendation identifies specific IoT requirements for monitoring physical city assets in smart cities. Common requirements of the IoT [ITU-T Y.4100], requirements for the interoperability of smart city platforms [ITU-T Y.4200] and high-level requirements and reference framework of smart city platforms [ITU-T Y.4201] constitute the basis for these specific requirements. Based on the identified requirements, a capability framework of a city asset monitoring system is provided, composed of city asset monitoring device capabilities, network connectivity management capability, IoT device management capabilities, identifier management capabilities, and city asset monitoring service capabilities. The requirements and capabilities only address technical aspects of the IoT-enabled city infrastructure, but the analysis of specific city assets is beyond the scope of this Recommendation. Other aspects, including regulatory and economic ones, are out of the scope of this document.