What type of property developments are approved in Green Belts?

The types of developments that are the stated exception to the general rule in government policy include:

• Agricultural buildings.
• Facilities for outdoor sport and recreation.
• The extension or alteration of an existing building (as long as it is not a disproportionate addition compared to the existing).
• The replacement of an existing building by one that is not materially larger.
• Limited infilling in some villages.

The redevelopment of larger, already developed sites within the developed boundaries of the site.
Most people encounter the planning system when they want to make changes to their house, extend existing buildings or replace a building – all of which (subject to their size) are exceptions to the normal presumption against development.