Permitted Development Flat Roof Extension

You can extend a detached dwelling by 8m to the rear if it s single storey or 3m if it s double.

Permitted development flat roof extension.

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. 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. Only half the area of land around the original house can be covered by extensions or other buildings. Extending under permitted development rights is entirely possible to do under the current rules.

Materials to be similar in appearance to the existing house. Before you arrange to alter or add to your roof you should first check to see if you need to apply for planning permission. An extension beyond the plane of the existing roof slope of the principal elevation that fronts a highway is not permitted development. Note that external alterations on a flat would normally require planning permission.

Permitted development rules for extensions. 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. If the extension is within 2m of a boundary maximum eaves height should be no higher than 3m to be permitted development. 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.

Roof extensions apart from hip to. So this means you can t add on a dormer to an extension built under permitted development. Width of side extension must not have a width greater than half the width of the original house. No part of the extension to be higher than the highest part of the existing roof.

Verandas balconies or raised platforms are not. So while permitted development rights are beneficial there s a lot to consider before starting work. Semi detached and terraced homes can be extended up to 6m to the rear of the property if single. Areas where there may be a planning condition article 4 direction or other restriction that limits or removes permitted development rights.

Any alteration to project no more than 150 millimetres from the existing roof plane. Side extensions to have a maximum height of four metres and width no more than half that of the original house. It should also speed up the whole process a little.