The importance and benefits of change and dependency management (CDM) and knowledge management (KM) and have been increasingly recognized in the Architecture, Engineering and Construction (AEC) industry. In energy efficiency retrofits, traditional manual methods of managing changes are inefficient and do not fully engage all team members or adequately capture the rationale for changes. In addition, given that knowledge has become a fundamental resource for organizations, it is imperative that any new knowledge generated from change management is captured and disseminated. This paper presents the development of the Integrated Change and Knowledge Management (ICKM) approach based on literature and case studies. The integrated approach established a systematic way to facilitate change and dependency management, capture lessons learned during CDM processes, and support information exchange between different disciplines in change and knowledge management activities. It has been evaluated and refined through two case studies.