Documentation of statistics: Census of Housing
The statistics and is described through a number of variables; type of dwelling, type of ownership, type of heating installation, toilet, bathing, and kitchen facilities plus the year of construction and also the stock of occupied dwellings by tenure (rented or owner-occupied dwellings) type of household etc.
https://www.dst.dk/en/Statistik/dokumentation/documentationofstatistics/census-of-housing
Documentation of statistics