Dataset - data.gov.uk

Brownfield Register

Register of previously developed (brownfield) land within Leicester City.
Brownfield Register (csv)

Brownfield Land Register - all brownfield sites in Leicester which have been assessed as appropriate for residential development. This includes sites with extant full planning...
- https://www.iana.org/assignments/media-types/application/json
- https://www.iana.org/assignments/media-types/text/csv
Brownfield Register 2020 (csv)

Brownfield Land Register - all brownfield sites in Leicester which have been assessed as appropriate for residential development. This includes sites with extant full planning...
- https://www.iana.org/assignments/media-types/text/csv
- https://www.iana.org/assignments/media-types/application/json

You can also access this registry using the API (see API Docs).