Expertise is commonly understood to be a distinct, even defining, aspect of being human -an attribute related to our efficacies to come to know and influence the, mostly nonhuman, world around us. In construction, expertise is commonly defined as the acquisition of skill and knowledge related to new technical processes, organizational routines, health and safety codes, even cultural norms. Despite the development of rule-following 'expert systems' in construction and beyond, the proposal that nonhuman technologies and artefacts can share our expertise is thus to be regarded with doubt: humans are human because of their lived expertise to undertake tasks faster and better than machines and other nonhumans. Increasingly, however, this anthropocentric view of expertise can be challenged by a 'posthuman turn' that is gathering pace across the social sciences and humanities. In this paper I evaluate, via the work of four seminal posthuman thinkers, the distinct, and varied, contribution that posthumanism might make to how we understand notions of construction expertise. In so doing I draw upon fictional examples of construction practices to illustrate the challenge and theoretical and practical opportunities in rethinking construction expertise via posthumanism.