Why are some planning applications granted, despite many objections?
The Local Planning authority must base its decision on planning considerations. These could include such things as impact on the area (parking, loss of open space or traffic), effect on amenity (such as sunlight, loss of privacy and excessive disturbance). The following would not normally constitute material planning considerations: devaluation of property, boundary disputes, nuisance during construction, land ownership rights (including Ancient Lights) restrictive covenants, structural details. Many of these would be subject to legislation other than planning or are matters to be resolved between adjoining land owners, not the Local Planning Authority.
