Class C – other alterations to roofs of a dwellinghouse
You do not normally need to apply for planning permission to re-roof your house or to insert Velux windows, roof lights or skylights as the permitted development rules allow for other alterations to roofs subject to the following limits and conditions.
- Any alteration to project no more than 150 millimetres from the existing roof plane.
- No alteration to be higher than the highest part of the roof.
- Side facing windows to be obscure-glazed; any opening to be 1.7m above the floor.
There are no restrictions on placing roof lights or skylights on elevations facing the street, however permission might also have been removed as a result of an Article 4 or a condition on a previous planning application. These permissions do not apply to flats or maisonettes. Nor do they apply to houses that have been converted from agricultural buildings, storage, light industrial, shops or casinos. They do however apply to houses (not flats) converted from offices under Class O.
Updated: 6th July 2020 to add link to Technical Guidance
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