These statistics on the dwelling stock describe the existing stock and number of dwellings on the last day of the year. The dwelling stock comprises both permanently occupied dwellings and dwellings and flats without permanent occupants. The statistics provide data on the dwelling stock by variables like type of building and number of rooms. Statistics on the dwelling stock can be produced according to all regional divisions based on municipalities and co-ordinates, as well as by postal code area. Statistics Finland receives most of the data on dwellings from the population information system of the Population Register Centre, into which municipal building inspection authorities report data concerning buildings and dwellings that are subject to building permits. The statistics on the dwelling stock constitute total data.