This paper presents the main concepts and deliverables of the BOOT structure. It also summarizes current and foreseen BOOT desalination projects, which indicate their increasing role in the water desalination market. Finally, this paper includes a comparison of the life-cycle costs of three recent similar BOOT projects (Larnaca in Cyprus, Tampa Bay in Florida, and Trinidad) and identifies those parameters which have the most significant impact on the life-cycle water cost.