Data set from (1) Danish, Latvian and Italian desk-top case studies on energy saving potential, including description and output from building simulation using national simulation tools, referring to RIBuild Task 5.1. (2) LCA and LCC analyses on Italian case study, referring to RIBuild Task 5.2 and 5.3. Overview of data files to be found in ’RIBuild data WP5 Case studies’ as part of this dataset. Further details to be found in RIBuild deliverable D5.1 (Task 5.1 and 5.2) and D5.2 (Task 5.3).