Work that needs planning permission

Larger house extensions

Permitted development rules apply to larger house extensions.

The following must apply:

  • the extension must be single storey and not exceed 4m in height
  • the dwelling must not be in a conservation area, an area of outstanding natural beauty, within a World Heritage Site, or on a site of special scientific interest
  • before starting works the developer must notify us by providing a written description and plans
  • we will consult with owners and occupiers of adjoining premises, giving them a minimum of 21 days to respond, and send a copy of the letter to the developer
  • if none of the owners or occupiers of adjoining premises object to the proposed development, then we will simply confirm to the developer that prior approval is not required
  • If the owners or occupiers of any adjoining premises object to the proposed development, then we must take into account all representations and assess the impact of the proposals on all adjoining premises, not just those that are the subject of representations
  • to make this assessment we may ask the developer to submit further information
  • if we refuse to approve the development, the developer may appeal to the Planning Inspectorate
  • if we confirm that approval is not needed then the works can be undertaken as described in the documents that the developer submitted to us
  • the developer must notify us of the completion of the works as soon as reasonably possible after completion