MOTIVATIONS & METHODSFraming the development of Smart Cities in terms of inclusion acts as a potent stimulus to re-think Urban HCI. Through this paper, we identify gaps and harness opportunities to make meaningful interactions and warn against the grave implications of inaction. By beginning to fuse ethnographic practice's rich history of engagement with cities, with burgeoning developments in smart technological infrastructure, the research aims to provoke and inure the urban development, human computer interaction and ethnographic communities to think carefully about the Smart City, and then look beyond it.In this paper, we argue that a crucial maneuver is necessary; by adapting heuristic methods developed to evaluate digital environments to diagnose physical sites. This affords thinking of an urban site as a user interface and prepares the ground for the appropriate application of digital infrastructure that can enhance and include, becoming a sustainable part of the urban fabric. The resultant general method can be used as an adaptable system for evaluating a city along with its users, drawing on their innate expertise; lived experience. Rather than attempting to erase the difference between physical and digital user environments, it suggests acknowledging their co-presence and interdependence with respect to enabling the utility of a city for users/inhabitants.Inspired by Kevin Lynch's seminal approach to urban studies (1960a) and borrowing from Jacob Neilson's (1992) heuristic user evaluation for this purpose, the researchers devised ways of rapidly capturing insights about a place by tapping into the perceptual images of users. Lynch privileged the meanings that inhabitants ascribed to their Shared Ethnography for Shared Cities - Potts, Sharma, Lindley 2 environment and his work attempted to make user perceptions a central stimulus for planning spaces, he aimed to capture perceptual images of a city and identify their common patterns. These two perspectives are a surprising fit and form an incredibly productive way of thinking about information layers of a city, its smartness. Coincidentally, these principles are sympathetic to third paradigm HCI thinking (Harrison, Tatar, and Sengers 2007).Rather than suggest guidelines, too inflexible for designers and too general for broad application, this paper suggests first shifting our stance on how we regard cities. It finds that such reframing can reveal novel ways of harnessing innate expertise dormant in inhabitants. This strategy is also effective in engaging those that sit outside the present gamut of users. Seemingly, the savvy core that, ironically, are the creative technical class that design systems will find it inherently difficult to design for inclusion, our research suggests alternative strategies. This indicates an issue of epistemic injustice, where either prejudice de-privileges the credibility of a person's insights or there is a gap in collective interpretive resources that puts someone at an unfair disadvantage when it comes to making sense of ...