Affect Control Theory (Heise, 1976) is a dynamic framework for understanding, explaining and researching social behaviour and experience in settings (Heise, 1979). In this presentation, an extension to the Affect Control Theory framework is introduced that enables the conceptualization and investigation of the influence of variations in the physical design of settings. Three primary developments to the Affect Control Theory framework were required to extend the theory for the investigation of the influence of physical design on social interaction. These three extensions to the Affect Control Theory framework are articulated within a diagrammatic representation of Affect Control Theory, called the Affect Control Theory Conceptual Architecture (ACTCA) (Lulham, 2007). The Affect Control Theory Conceptual Architecture (ACTCA) is proposed as an applicable, contestable and scientifically valid framework with many potential applications in environmental psychology research.