We propose a conceptual design framework for the classification and design of applications that augment architectural environments with digital information. The dimensions of the framework consist of the layers that compose architectural space (façade, interior and structure) and its embodiments (expressive medium, responsive space and social actor). We further introduce design characteristics for each application area within the framework. Accordingly, we describe two conceptual prototypes that we developed to investigate the validity of the framework as a conceptual design tool.