Badger setts are legally protected in the UK, and development near setts requires surveys, mitigation and licensing to ensure badger welfare is protected during construction.
Badgers disturbed from established setts during breeding season face displacement, cub separation and loss of established food territories. Sett collapse from nearby excavation or flooding causes acute welfare emergencies. Development that buries sett entrance holes can entomb occupants. Legal protection provides a welfare framework, but enforcement requires active monitoring and reporting by the public.