New regulations came into force on 30 September 2013 which changed the building work which can be done without needing to apply for planning permission. The Welsh Government has produced a technical guide, and a householder guide, available here, to help you understand how permitted development rules might apply to your circumstances.
You do not normally need to apply for planning permission to re-roof your house or to insert roof lights or skylights.
The permitted development rules allow for roof alterations without the need for planning permission, subject to the following limits and conditions:
- Any alteration to the roof cannot project more than 150 millimetres from the existing roof plane
- Alterations cannot be higher than the highest part of the roof
- Side facing windows need to be obscure-glazed and non-opening if they are installed in the side elevation of a dwellinghouse that is within 10.5 metres of a side boundary of the house
- The appearance of the materials used must, as far as possible, match the appearance of those used on your existing roof
- Roof lights are not permitted in conservations area, national parks, areas of outstanding natural beauty or World Heritage Sites
- The permitted development regime for solar panels has different limits on projections and in relation to protected areas.
Please note: the permitted development allowances described here apply to houses not flats, maisonettes or other buildings. View guidance on flats and maisonettes here.
Disclaimer - Wales
This is an introductory guide and is not a definitive source of legal information. This guidance relates to the planning regime for Wales. Policy in England may differ. If in doubt contact your Local Planning Authority.