With climate advocacy becoming mainstream and financial constraints continuing to weigh on clients and institutions, many are looking at their existing building stock as a means of addressing growing and changing needs while being good environmental stewards. In most cases, these existing buildings require varying degrees of intervention to provide performance that is either required by modern codes or demanded by clients. In many cases, the need for improved performance must be balanced with the sensitivity to the architectural character of these buildings. Understanding an integrated and robust approach to regenerative renewal will assist building owners in making informed decisions that will ensure longevity and useability of their buildings.