In the mid-1990s, technologist Mark Weiser identified four fundamental relationships between people and computers: the mainframe, personal computer, distributed computing and ubiquitous computing eras. Each successive relationship is characterized by smaller, cheaper, and more numerous computers. We are now on the cusp of ubiquitous computing, in which computers will disappear seamlessly into our environment, challenging us to re-conceptualize the role of computers in our lives and in our landscapes.These challenges extend to the practice of environmental design. Current design processes employ computers, but largely ignore the potential of embedding computation within the built environment. This thesis examines current research concerning ubiquitous computing, human-computer interaction, and hybrid space to better understand emerging relationships between digital information, computation and the built environment. This thesis recommends the practice of interaction design as a means of designing appropriate interactions between people and ubiquitous computing technology in the context of physical space.