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Do I need planning permission for my loft conversion?

Do I need planning permission for my loft conversion?

Project type

  • Loft conversion
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Most loft conversions fall under what is known as permitted development so you may not need planning permission. However, you will if:

  • Your home is a listed building.
  • You live in a designated area, for example, a conservation area or National Park.
  • You are going to alter the roof height or shape. For example, a mansard loft conversion would fit into this category.
  • You want to include a balcony.
  • Your roof space is more than 40m2 for terraced homes or 50m2 for detached or semi-detached homes.
  • Your home is a flat or a maisonette. Sorry, permitted developments don’t apply to these properties, so you need to get planning permission for your loft conversion.

For further information contact your local authority planning department.

Further information

Do I need building regulations approval for my loft conversion?