This paper presents an original life cycle assessment (LCA) of a concentrating solar power (CSP) plant with thermochemical energy storage (TCES). The studied CSP plant is a hypothetic solar tower plant with a Rankine power cycle, and the TCES material used is calcium hydroxide. Based on three proposed TCES integration concepts, detailed sizing and the associated emission inventory are performed for four main groups that constitute the CSP plant, including the solar field, the solar tower, the storage system and the power cycle. Various midpoint impact categories are evaluated using the Novelty & significance The present study seeks to fill the research gap by providing, for the first time, an LCA of the CSP plant with TCES integration. The contributions of this paper are important because it will expand the limited literature and provide additional information on the environmental impacts of CSP plants with TES, especially with TCES. The results obtained may be used to assist in the decision-making process in evaluating and selecting appropriate TES technologies and integration concepts for future CSP plants from the life cycle point of view.