Intelligent environments are a natural tool for the creation of intelligent workplaces. However, in order to be used in this way, it is necessary to face the challenge posed by the variability of the elements included in the space and the need to adjust the smart elements to the preferences of the users. This paper presents a service-based architecture that enables the creation and management of intelligent workplaces based on the concept of intelligent environment. To this end, a series of functional restrictions are presented, which simplify the design and implementation of the services to be deployed, and information models, to formalize both the space and the preferences of the users based on the concept of activity. The architecture and models presented facilitate the adaptation of a solution developed by a supplier to any type of intelligent environment in an efficient and scalable way.