Density as verb: on the emergence and circulation of a category in Swiss urban development

This paper examines the emergence and circulation of “density” as an expert category in Swiss urban development, arguing that it operates as a boundary object that shapes planning practices, policies and urban imaginaries. Drawing on policy documents, expert interviews and case studies, the paper traces how “density” has evolved from a technical parameter to a contested and malleable notion mobilized across different planning and political arenas. By analysing its use in planning debates, political arenas, legal frameworks and participatory workshops, I highlight how density functions as a verb: actively structuring urban transformation, mediating conflicts, provoking resistance and legitimizing interventions. The Swiss case illustrates how density, as a flexible yet impactful category, adapts to shifting governance regimes, development imperatives and techno-political negotiations.