You could apply for a planning easement as you have a existing roof.
Pitched roof extension planning permission.
Pitched roof extensions typically cost more simply because they involve more work and take longer to complete.
If within 2m of the boundaries if the building is under 30m2 you will not require any building control approval.
If your house has been extended before the floor area of the extension you are now proposing and the floor area of any previous extension including those for which you previously got planning permission must not exceed 40 square metres.
If you are wanting to knock down a rebuild or build a huge extension then yes you will need need permission from your local authority before you begin.
When converting your flat roof into a pitched roof that s when planning permission may come into play.
I am under the impression that if you construct a ground floor extension you can do this with a pitched roof as long as it isn t taller than the existing roof line of the main property without requiring pp along with other restrictions under permitted development rights.
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.
Always contact your local planning authority to be sure.
Roof pitch must match existing house as far as practicable note that this also applies to any upper storey built on an existing 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.
Roi you can build an extension without planning permission only to the rear of the house.
But there are numerous smaller improvements that you may be surprised to learn can be undertaken without planning permission.
For instance if you are planning on increasing the amount of space within your home you must also adhere to the rules regarding loft conversions.
However when carrying out larger structural alterations this may be a little more difficult.
Any upper floor window located in a side elevation must be obscure glazed.
In my opinion this means that no part of the extension should be visible to the side facing the front.
Depending on why you want to replaces your roof also means that you have to comply with different rules.
Before you start any work you must make sure you.
A low pitched roof should be easy enough to gain planning permission for.
Pros of a pitched roof extension.
This is a factor that planning departments tend to look on favourably.
Pitched roof extensions afford a more traditional look and that means they blend in better with the style of many houses.
Converting your flat roof to a pitched roof does require planning permission as any alteration that is higher than the highest part of the existing roof requires approval.
It is a planning rule you cannot have the roof more than 2 5 m.