This review paper is concerned with two bodies of knowledge in particular, evaluation and conservation. Generally, evaluation is a popular management tool for both public and private sectors because of its useful purposes in improving organisations and programme interventions, investigating oversight and compliance, assessing merit and worth, as well as nurturing knowledge. Being practised in various programmes such as health, education, business and community, evaluation is still uncommon in the general conservation domain, specifically in the realm of built heritage conservation. Due to the scantiness of available literature pertinent to conservation evaluation, this paper provides an update to the literature body by reviewing and discussing the general theories of evaluation, followed by a highlight on gaps of conservation evaluation in relation to built heritage. Finally, a special annotation on the absence of evaluation in the current Malaysian Built Heritage Conservation Framework (BHCF) is made in the quest of shifting Malaysian conservation best practice to a new standard.