The Victorian City of London’s financial center expanded and renewed its building infrastructure virtually unimpeded by considerations of urban preservation, conservation, or public opinion. The next phase of massive rebuilding, during the long post-1945 boom, appeared likely to follow the same pattern. However, by the mid-1960s, the freedom of City office owner-occupiers and developers to do as they wished with their buildings had become substantially constrained by rising conservationist sentiment. This paper explores this process through the history of the design, building, and eventual aborted demolition of Gibson Hall, the Bishopsgate headquarters of National Provincial Bank for over a century. This paper charts the life of Gibson Hall, in particular its conception, design, and, ultimately, its attempted redevelopment. We also consider the long-term consequences of the rebalancing between economic and conservation objectives for the nature of British urban redevelopment and the adoption of a “throwaway” business headquarters style—to remove any risk of popular support for preservation.