Permitted Development Flat Roof Extension

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.

Permitted development flat roof extension.

Only half the area of land around the original house can be covered by extensions or other buildings. Any alteration to project no more than 150 millimetres from the existing roof plane. Extending under permitted development rights is entirely possible to do under the current rules. No part of the extension to be higher than the highest part of the existing roof.

Roof extensions apart from hip to. 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. Permitted development rules for extensions. You can extend a detached dwelling by 8m to the rear if it s single storey or 3m if it s double.

Areas where there may be a planning condition article 4 direction or other restriction that limits or removes permitted development rights. Semi detached and terraced homes can be extended up to 6m to the rear of the property if single. 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. If altering the loft space of a flat ensure that you own the roof void and that you also have the freeholders permission.

It should also speed up the whole process a little. 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. So this means you can t add on a dormer to an extension built under permitted development.

If the extension is within 2m of a boundary maximum eaves height should be no higher than 3m to be permitted development. Before you arrange to alter or add to your roof you should first check to see if you need to apply for planning permission. Width of side extension must not have a width greater than half the width of the original house. Verandas balconies or raised platforms are not.

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. An extension beyond the plane of the existing roof slope of the principal elevation that fronts a highway is not permitted development. Side extensions to have a maximum height of four metres and width no more than half that of the original house.