In this paper, we propose a prototype of a user centered design system for Smart Homes which lets users: (1) configure different interactive tasks, and (2) express activity specifications and preferences during the design process. The main objective of this paper is how to create and to implement VR Smart Home prototype as a platform to increase user contribution in the earliest phases of design. The presented prototype has the capability of visualizing smart technologies (Smart BIM), performing real-time interactions and tasks (Smart Design System), and revealing users’ preferences (Activity Preference plug-in). The long-term goal of developing this prototype is to bridge the gap between the designers and the clients in a Smart Home design...