Type of dwelling	Construction year (added) of the building	Total
2.1 Total main dwellings	Total	18,083,692
2.1 Total main dwellings	Before 1900	597,453
2.1 Total main dwellings	From 1900 to 1920	358,404
2.1 Total main dwellings	From 1921 to 1940	490,702
2.1 Total main dwellings	From 1941 to 1950	546,733
2.1 Total main dwellings	From 1951 to 1960	1,315,009
2.1 Total main dwellings	From 1961 to 1970	2,703,119
2.1 Total main dwellings	From 1971 to 1980	3,720,472
2.1 Total main dwellings	From 1981 to 1990	2,242,375
2.1 Total main dwellings	From 1991 to 2001	2,598,718
2.1 Total main dwellings	From 2002 to 2011	2,955,554
2.1 Total main dwellings	No data recorded	555,155
2.21 Secondary dwellings	Total	3,681,565
2.21 Secondary dwellings	Before 1900	207,956
2.21 Secondary dwellings	From 1900 to 1920	102,711
2.21 Secondary dwellings	From 1921 to 1940	108,352
2.21 Secondary dwellings	From 1941 to 1950	124,624
2.21 Secondary dwellings	From 1951 to 1960	218,147
2.21 Secondary dwellings	From 1961 to 1970	401,816
2.21 Secondary dwellings	From 1971 to 1980	747,628
2.21 Secondary dwellings	From 1981 to 1990	599,071
2.21 Secondary dwellings	From 1991 to 2001	480,647
2.21 Secondary dwellings	From 2002 to 2011	625,945
2.21 Secondary dwellings	No data recorded	64,667
2.22 Empty dwellings	Total	3,443,365
2.22 Empty dwellings	Before 1900	236,471
2.22 Empty dwellings	From 1900 to 1920	129,586
2.22 Empty dwellings	From 1921 to 1940	155,761
2.22 Empty dwellings	From 1941 to 1950	159,485
2.22 Empty dwellings	From 1951 to 1960	300,949
2.22 Empty dwellings	From 1961 to 1970	468,263
2.22 Empty dwellings	From 1971 to 1980	543,252
2.22 Empty dwellings	From 1981 to 1990	295,750
2.22 Empty dwellings	From 1991 to 2001	316,828
2.22 Empty dwellings	From 2002 to 2011	767,925
2.22 Empty dwellings	No data recorded	69,095