Lifecycle building performance assessment (LBPA) practices are being increasingly applied on existing buildings to ensure that performance requirements are fulfilled during building service-life. LBPA is a multi-disciplinary and information-intense process that requires computational tools for information management and decision support. We have previously developed a computational reference model (CLIP-Core) that supports various component-based LBPA practices. When CLIP-Core is considered to be used, it needs to be adapted to the specific context it addresses. We developed two such domain models, CLIP EPI-CREM and CLIP-CMU, for two existing LBPA practices. This paper addresses the evaluation of CLIP-Core and its potential in supporting various requirements. Hereto, we first discuss CLIP-Core and the two domain models. Then we present the evaluation results based on the domain models and their development processes. Finally we discuss guidelines for extending CLIP-Core and recommend technologies and alternative architectures that can increase CLIP-Core's usability. (C) 2014 Elsevier B.V. All rights reserved.