Celebrated annually on October 28, Sustainable Building Restoration & Adaptive Reuse Day champions the greenest philosophy in modern architecture: "The greenest building is the one that is already built." By retrofitting historic masonry, warehouses, and civic landmarks instead of demolishing them, architects conserve municipal identity while slashing planetary greenhouse gas emissions.
1. The Critical Concept of Embodied Carbon
Building construction and materials account for roughly 11% of all global greenhouse gas emissions. Demolishing an existing concrete, brick, or steel building releases the millions of tons of carbon invested in its original manufacturing (embodied carbon) and wastes thousands of tons of construction landfill. Restoring and retrofitting existing structures avoids this catastrophic environmental cost.
