Clarifying and re-conceptualising density

► Density is an important concept within planning, although confusion abounds about definitions, policies and relationships to other issues. ► A taxonomy of density brings some clarity to the complexity, illustrating what types of density have been explored in research and where the gaps lie. ► Density should be re-conceptualised to include both 'hard' and 'soft' elements so that policymakers and practitioners consider the concept in a broader manner.