Roof Extension Planning Permission

If your extension will have one storey you don t need planning permission as long as.

Roof extension planning permission.

If your loft conversion plans include installing a roof light you must apply for householder planning permission if. It would protrude more than 15cm above the roof slope. A mansard roof extension can represent a much more significant change however where full planning permission will. It doesn t go back further than 3 metres if it s a terraced house or 4 metres if it isn t.

This is when measured perpendicularly from the external surface of the roof. This is a battle that continues but the general answer is that if you have a terrace house with a traditional london roof in a conservation area and all the roofs in your stretch of houses are unchanged it can sometimes be difficult to get planning permission to build a mansard home extension. Any alteration to project no more than 150 millimetres from the existing roof plane. And non opening unless the openable part is more than 1 7 metres above the floor.

It s located at the back of the house. It s not higher than 4 metres including. Any upper floor window located in a side elevation must be obscure glazed. Roof pitch must match existing house as far as practicable note that this also applies to any upper storey built on an existing extension.

A dormer roof extension can often be done without full planning permission under permitted development rights. National planning guidance concentrates on general loft extensions and conversions where dormers are more commonplace.