It is a planning rule you cannot have the roof more than 2 5 m.
Pitched roof extension planning permission.
You could apply for a planning easement as you have a existing roof.
If within 2m of the boundaries if the building is under 30m2 you will not require any building control approval.
Roi you can build an extension without planning permission only to the rear of the house.
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.
Roof pitch must match existing house as far as practicable note that this also applies to any upper storey built on an existing extension.
Pitched roof extensions typically cost more simply because they involve more work and take longer to complete.
Always contact your local planning authority to be sure.
Any alteration to project no more than 150 millimetres from the existing roof plane.
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.
And non opening unless the openable part is more than 1 7 metres above the floor.
When converting your flat roof into a pitched roof that s when planning permission may come into play.
Pros of a pitched roof extension.
The boundary will be clearly shown on your deed plan.
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.
But there are numerous smaller improvements that you may be surprised to learn can be undertaken without planning permission.
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.
A low pitched roof should be easy enough to gain planning permission for.
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.
Depending on why you want to replaces your roof also means that you have to comply with different rules.
In my opinion this means that no part of the extension should be visible to the side facing the front.
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.
This is a factor that planning departments tend to look on favourably.
Projects such as installing rooflights converting your garage changing your cladding or adding a conservatory can all be completed with implied consent known as permitted development pd.