All local planning authorities in England are required to produce and publish a register of land that has been previously built on (brownfield sites). The register includes brownfield sites that are considered suitable for residential development. The register will be updated at least once a year.
The register is in two parts:
Part 1 - includes sites that have been assessed and are considered suitable for residential development, e.g. sites with planning permission or allocations in local plans
Part 2 - will include sites that are in in Part 1 which are considered as suitable for the granting of planning permission in principle for residential development
Please note that currently the register only contains sites in Part 1