This thesis explores the agency of the colonnade as a public space of transition to create third space, balancing the relationship between contemporary work and the urban public environment. Typical strategies to deliver such collaborative and social space rely on either the hyper-flexibility of a free plan or the specificity of program. In contrast, this thesis projects a third position using formal specificity within the colonnade to exploit the spatial ambiguity of a threshold. By placing public, third space functions in a colonnade threshold around the office, contemporary work shifts to an urban-oriented model of public collaboration. This strategy opens production to the city and allows for unpredictable interactions that can benefit both the producers and consumers of modern work.