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

To ask the Secretary of State for Levelling Up, Housing and Communities, what estimate he has made of the area of (a) London and (b) other towns and cities covered by residential gardens.

Data on the area of residential gardens as at April 2022 expressed as a percentage of the total land area in hectares is already publicly available here. Separate figures are given for England as a whole, each region and each local authority.

And information on the amounts of land changing use from residential gardens to other uses is also available here.