Loft conversions & dormers

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Do I Need To Make A Planning Application?

Loft conversions & dormers

The conversion of an attic and installation of Velux style roof windows may not necessarily require planning permission, which depends on the permitted development rights in your area. However it is always necessary that your building work complies with building regulations as well as checking with your local authority the particular circumstances of your property. If you are considering installing dormer windows you may not have to submit a planning application subject to the following limits and conditions:

  • A maximum volume of 40 cubic meters on terraced houses.
  • A maximum volume of 50 cubic meters on detached and semi detached houses.
  • No extension beyond the plane of the existing roof slope on the main elevation that fronts the road.
  • No extension above the highest part of the room.
  • Materials to be of similar appearance to the existing house.
  • No balconies, verandas or raised platforms.
  • Opening to be 1.7m above the floor.
  • Opening to be 1.7m above the floor.
  • Roof extensions apart from “hip to gable” ones to be set back as far as possible (at least 20cm from the eaves.)
  • You are not living in an area with extra restrictions (conservation areas etc.)