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Permitted Development

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Permitted Development

Loft conversion and permitted development rights – most loft conversions can be built within permitted development rights law, meaning you do not need ‘Planning Permission’. Permitted development – your right to develop your home.

  • keyboard_arrow_right A volume allowance of 40 cubic metres additional roof space for terraced houses*.
  • keyboard_arrow_right A volume allowance of 50 cubic metres additional roof space for detached and semi-detached houses*.
  • keyboard_arrow_right No extension beyond the plane of the existing roof slope of the principal elevation that fronts the highway.
  • keyboard_arrow_right No extension to be higher than the highest part of the roof.
  • keyboard_arrow_right Materials to be similar in appearance to the existing house.
  • keyboard_arrow_right No verandas, balconies or raised platforms.
  • keyboard_arrow_right Side-facing windows to be obscure-glazed; any opening to be 1.7m above the floor.
  • keyboard_arrow_right Roof extensions not to be permitted development in designated areas which include national parks and the Broads, areas of outstanding natural beauty, conservation areas and world heritage sites.
  • keyboard_arrow_right Roof extensions, apart from hip to gable ones, to be set back, as far as practicable, at least 20cm from the original eaves.
  • keyboard_arrow_right The roof enlargement cannot overhang the outer face of the wall of the original house.
  • keyboard_arrow_right These permitted development allowances apply to houses.

Any More Questions?

For more help please visit the interactive loft conversions mini guide on the government planning portal.

Visit The Interactive Loft Conversions Guide