Infrastructure Planning Find out about infrastructure planning for the whole of Cumbria. Local plans Local plans set out planning decisions for development. Neighbourhood planning Neighbourhood planning lets parish and town councils prepare formal planning document. Self-build and custom housebuilding Self build or custom build lets you to design and build your home. Supplementary planning documents These extra planning documents give clear details. Clear details of the policies and proposals set out in development plans. Areas of outstanding natural beauty (AONBs) An area of outstanding natural beauty (AONB) is land protected by the Countryside and Rights of Way Act 2000 (CROW Act). It protects the land to conserve and enhance its natural beauty.