Type of House: Homes are grouped by type of House, according to the following:
Separate small houses: 1-2 dwelling town houses, semi-detached houses and small buildings that should be compared to separate residential buildings (e.g. permanently populated recreational rentals)
The line-and the chain of houses: residential buildings with at least three in one turn small houses
At least three apartment buildings, apartment buildings, dormitories: with at least two apartments is located on top of and not under the previous categories
The rest of the building, including the buildings, which house type is unknown.