In declining cities, an abundance of vacant, devalued property, and underresourced regulatory mechanisms challenge dominant understandings of private ownership of real property as a source of investment and stability for individuals and neighborhoods. Drawing on four years of ethnography and 65 interviews in Detroit, this article finds that, despite the privileged standing of private property in U.S. culture, residents frequently accept or advocate for illegal property use, such as squatting or scrapping. Instead of adhering to the law, residents use a communityembraced norm-an ethos of care-to assess the acceptability of illegal property use, and they do so in order to positively impact the physical and social dynamics of their neighborhoods. The findings of this article highlight the influence of local conditions for how residents perceive property law violations, and call into question the generalizability and applicability of neighborhood improvement strategies that rest on private, legal ownership to induce responsible care.