The Grenfell fire was symbolic of an unequal urban landscape closely tied to material and aesthetic norms around property ownership and entitlement. The aim of this paper is to unsettle these norms by advancing a novel genealogical approach. Through systematic review of government archives seldom studied by property researchers, historical comparisons are mobilised to challenge the taken-for-granted way in which we approach property and ownership today. It is shown how, in the face of a comparable housing crisis and direct action, both Churchill's and Atlee's post-war governments temporarily overlooked property norms by extending wartime requisitioning powers. Going further, however, the paper argues that by revisiting history, we can also rediscover a legacy of "forced entry" that might open up political possibilities in the present. By advancing a genealogical approach to ownership, the paper contributes to wider discussions around property norms, concluding that we have before (and can again) enact property differently.