One in three of Norway's multi-family buildings are in Oslo

Density of cabins and holiday homes in municipalities. Source: Statistics Norway
Statistics show that almost every third multi-family building is in Oslo. There are 3.9 million buildings in Norway, whereof 33,306 are multi-family buildings. In Oslo there are 10,478 multi-family buildings.
More than one-third of the building stocks, 1.5 million buildings, are buildings for residential purposes. The remaining building stock consists of about 1.7 million holiday houses, garages etc., and about 745,000 other non-residential buildings. More than 0.5 million buildings belong to the agriculture and fishing sector.
Almost 430,000 cabins
The building stock had a net increase of 5,398 cabins last year, whereof 616 are detached houses and farmhouses used as holiday houses. Most municipalities have had minor changes in the building stock. The greatest changes have been in the municipalities of Ål, Trysil, Åmot, Grong, Ringebu and Vinje, which all had a net increase of more than 100 cabins each. Except from Grong municipality, all the municipalities have a large number of cabins.
Source: Statistics Norway