The building value data is derived from an annual survey carried out by Turner & Townsend. We receive knowledge on the extent and corporate ownership of all land titles in England & Wales from the Land Registry. This is an actual-time market snapshot – the information covers presently listed properties. Once properties are removed from Zoopla, Rightmove or Spareroom, they are soon removed from this tab. Once properties are removed from SpareRoom, they are soon removed from this tab. We match the Land Registry information to EPC data offered by the MCHLG.