World War II's end triggered suburbanisation and a housing boom, leading to rapid urban growth. Today, however, economic challenges and climate goals necessitate a shift towards sustainable building practices. 

Refurbishment of existing buildings, rather than new construction, is now key. This approach enhances energy efficiency, reduces environmental impact, and preserves urban spaces. 

Projects like the renovation of Le Corbusier's Maison Guiette and the transformation of Filmlageret Community Housing illustrate the potential of refurbishment. 

By upgrading rather than demolishing structures, we can create sustainable, resource-efficient environments while respecting architectural heritage and improving quality of life.