Most Architecture, Engineering and Construction decarbonization and resiliency techniques work at the building scale. But we can't just build our way out of a climate crisis, even when we are successful in moving the AEC industry to sustainable methods. Achieving long-term sustainability requires making the cities and regions we live and work in more habitable, with a better supply and broader range of housing and mobility options. It makes little sense to put so much effort into making our buildings sustainable if the places those buildings occupy are business-as-usual in their auto-centrism and lack of housing integration. By developing smarter and more efficient land use structures, we can drastically reduce the quantity of energy we use in our daily lives while improving the quality of the experience. As we have learned from building, even broadly understood and seemingly achievable goals need to be supported with the hard and sustained work of technical knowledge-building.