Permitted Development Flat Roof Extension

Permitted development rules for extensions.

Permitted development flat roof extension.

So this means you can t add on a dormer to an extension built under permitted development. Extensions cannot be higher than the highest part of the existing roof. You can use it to check if your project proposal can be done within permitted development pd rights or if it will require a full planning application. Materials to be similar in appearance to the existing house.

Extending under permitted development rights is entirely possible to do under the current rules. Any alteration to project no more than 150 millimetres from the existing roof plane. Note that external alterations on a flat would normally require planning permission. So while permitted development rights are beneficial there s a lot to consider before starting work.

See below for a detailed guide to permitted development rules for single and double storey rear extensions side and roof extensions loft conversions porches and outbuildings. Roof extensions apart from hip to. You do not normally need to apply for planning permission to re roof your house or to insert roof lights or skylights as the permitted development rules allow for roof alterations subject to the following limits and conditions. Before you arrange to alter or add to your roof you should first check to see if you need to apply for planning permission.

Gaining permitted development rights for extensions means that you can avoid having to apply for planning permission so will need slightly less paperwork and will make a slight cost saving. It should also speed up the whole process a little. A dormer is an extension usually with a window that sticks out of a sloping roof and gives you a bit more headroom. If the extension is within 2m of a boundary maximum eaves height should be no higher than 3m to be permitted development.

Verandas balconies or raised platforms are not. If altering the loft space of a flat ensure that you own the roof void and that you also have the freeholders permission. An extension beyond the plane of the existing roof slope of the principal elevation that fronts a highway is not permitted development. You can extend a detached dwelling by 8m to the rear if it s single storey or 3m if it s double.

No part of the extension to be higher than the highest part of the existing roof. Width of side extension must not have a width greater than half the width of the original house. Side extensions to have a maximum height of four metres and width no more than half that of the original house.