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New roof lights or skylights will not normally require an application for planning permission providing:

  • they do not protrude more than 150mm beyond the plane of the roof slope
  • they are no higher than the highest part of the roof
  • if they are in side elevation roof slope they must be obscure-glazed and
  • either non opening or more than 1.7 metres above the floor level.

If additional volume is created it may be treated as an extension and separate rules will apply (see ‘Loft conversion’).

If you live in a flat, listed building or designated area (conservation area, national park, Area of Outstanding Natural Beauty, etc…) you should check with your Local Planning Authority before carrying out any work.

Learn more on the Planning Portal.

Flats and Maisonettes

The planning regime for flats and maisonettes differs in many important ways to that which covers houses.

Bear in mind that the permitted development rights which apply to many common projects for houses do not apply to flats.

Learn more on the Planning Portal.

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