A house is considered to be permanently occupied, if at least one dwelling within it is occupied for permanent residence.

A family house is considered to be permanently occupied, if at least one dwelling within it is occupied for permanent residence.

A residential building is considered to be permanently occupied, if at least one dwelling within it is occupied for permanent residence.

The number of floors in permanently occupied houses expresses the total number of underground and above-ground floors in the house.

The gas connection of permanently occupied houses defines whether the houses have an established gas connection to the public network. The use of propane-butane bottles and propane-butane tanks is not considered a gas connection.

The type of sewerage system in permanently occupied houses is information on the connection of houses to the public sewerage network.