Housing Stock from 1991 is permanent occupied and unoccupied habitable residential dwellings and is derived by adding in current year completions to the existing housing stock and deducting a fixed obsolescence factor of 0.73% from 1991 to 2002. These figures are calibrated to the number of private and vacant habitable dwellings recorded at each of the Census of Population. 0% obsolescence was applied from 2002 to 2006 to keep stock figures in line with Census data. The rate of obsolescence has been increased to 0.22% and applied to data post 2006. Data prior to 1991 is available on the website - the data is not directly comparable to this dataset due to definitional issues with the census figures. Housing Stock from 1970 to 1991 does not include vacant habitable residential dwellings. The most current data is published on these sheets. Previously published data may be subject to revision. Any change from the originally published data will be highlighted by a comment on the cell in question. These comments will be maintained for at least a year after the date of the value change.

Data post-1991 is available on the website - the data is not directly comparable to this dataset due to definitional issues with the census figures. Housing Stock from 1970 to 1991 does not include vacant habitable residential dwellings. The most current data is published on these sheets. Previously published data may be subject to revision. Any change from the originally published data will be highlighted by a comment on the cell in question. These comments will be maintained for at least a year after the date of the value change.