The Planning System

Do I need permission to re-roof my house?

You will not require permission, provided that the height of the roof is not increased and the appearance is not significantly changed.

Do I need permission for a roof space conversion?

The internal alterations to convert a roof space to provide additional living accommodation do not require permission. However, installing dormer windows, inserting roof lights or carrying out other works to alter the roof may need permission (see below).

Do I need permission for dormer windows or other roof extensions?

You will not require permission, provided you comply with Rules G - K below

Rule G. The house is not in a Conservation Area.

Rule H. No part of the roof extension will project in front of any existing roof slope of the house which faces onto a road (see Illustration 5).

Rule I. The design and materials are in keeping with the main house.

Rule J. No part of the dormer will be higher than the ridge line of the house.

Rule K. The size of the roof extension will not be more than -

i. 20 cubic metres in the case of a terrace; or,
ii. 25 cubic metres in any other case.

(This allowance is not in addition to, but must be deducted from, the allowances set out in Section 1.)

Do I need permission for roof lights (e.g. velux windows)?

You will not require permission, provided the roof light does not project beyond the plane of any existing roof slope by more than 150 mm (see Illustration 5).

For Listed Buildings see Note 5.

Illustration 5
Extensions Consisting of an Addition or Alteration to a Roof