Abstract: Recent research has documented the prevalence of informal housing across urban and suburban contexts in the United States. While there have been some efforts to theorize across cases, there has been little to no work to connect theory to on-the-ground occurrences to offer clear lessons for planners. This article begins to fill this gap. Analyzing across existing research, we create a typology of informal housing in the United States: infill, subdivision, repurposing of private property, and occupation of public space. Then, we identify five common features that drive their production, use, and conditions. Finally, we offer important takeaways for planners and practitioners.

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