This paper examines the needs of SMEs for services that enable the key business functions required. Through a series of semi-structured interviews with 30+ SMEs, it is concluded that the services required varied in importance depending on the size and stage of development of the SME. As a result, the key IT requirements for operations in SMEs were developed and a suggested list of cloud-based applications to deliver them through a city cloud service was derived. A good initial point for these Cloud services is to provide a set of common services for SMEs to utilise that enhance collaboration capability. This paper presents the architecture of a set of cloud services that can, via a City Cloud, enhance and boost economic activity in the City Cloud region. Significant elements of the architecture have been tested and key results are presented.