Question to the Ministry of Housing, Communities and Local Government:

To ask His Majesty's Government what is their estimate of the number of flats in London which are (1) unoccupied, or (2) occupied by owners or other residents at less than 40 per cent of available capacity.

While the Department publishes data through the English Housing Survey (EHS) on whether dwellings are underoccupied (according to the bedroom standard) or vacant, its sample size means it does not have reliable estimates for flats in London. The department also publishes statistics on vacant dwellings, as reported for the purposes of council tax, but does not disaggregate by type of property.

More information on the EHS can be found at English Housing Survey - GOV.UK., while statistics on vacant dwellings can be found at https://www.gov.uk/government/collections/council-taxbase-statistics.