This report details the key insights from two workshops held in February and April 2025 at the Central Statistics Office (CSO) in Rathmines, Dublin, co-organised by the Data Stories project at Maynooth University and the CSO. The first workshop sought to chart the entire property and planning data ecosystem for Ireland and to identify data gaps and silences and potential ways to fill these, and to note associated data-related issues. The second workshop focused specifically on data sources relating to the planning and development pipeline of new property. Across the two workshops, 59 individuals from 40 organisations (14 state, 10 business, 9 civil society, 7 research institutions) participated. The report sets out the approach adopted in the workshops, provides a high-level overview of the Irish property and planning data ecosystem, details the main data gaps and silences identified, and discusses the principal issues regarding the data ecosystem noted by workshop participants. The analysis presented is supplemented with insights from interviews with 135 property and planning experts in Ireland conducted as part of the wider Data Stories project. The report is accompanied by a spreadsheet that details all the sources of longitudinal property and planning data in Ireland, organised by theme, and including weblinks and information about available variables, data accessibility, spatial scale, time-series and timeliness.