As the late urban planner Jaime Lerner once argued, the future of architecture lies not in building new cities but in updating those that already exist. In a world where resources are finite and urban space is increasingly saturated, his statement feels more urgent than ever. It calls for architects to look inward, to rethink what truly needs to be built, and to recognize the creative potential of what is already there. Within the constraints of existing structures lies an opportunity to design differently: to repair, adapt, and reuse. Or, as French poet Louis Aragon would have it, to reinvent the past to see the beauty of the future.
This month, ArchDaily explores Building Less: Rethink, Reuse, Renovate, Repurpose, a theme that examines the growing shift in architecture toward working with what already exists. As urban spaces grow denser and land becomes scarce, architects are rethinking the impulse to build anew. Instead, they are extending the life of existing structures, embracing retrofit and adaptive reuse as strategies for sustainability and creativity. The question guiding this exploration is simple, yet urgent: How can architecture redefine urban futures by building less?
