Session 3: The Urban Expansion program and Buildings & Cities co-host its third session, “Urban Densification in Practice,” as part of its Anatomy of Density webinar series. This webinar focuses on emerging practices aimed at making more room within existing footprints of cities to facilitate densification while avoiding its pitfalls and successfully confronting local resistance. This, it turns out, is not so simple: the costs and benefits of densification depend intricately on its direct, indirect, and cumulative effects on present and future inhabitants, at various scales, and with spatial justice in mind. This webinar will focus on four case studies in cities or countries that attempted, or are attempting, to densify in practice—(1) South Africa, (2) Jinan, China, (3) London, and (4) Israel—and discuss the merits and limitations of densification strategies in various urban settings.