You would probably only need planning permission if the garage projects forward of the main house because then the extended roof would be located closer to a highway than the original house if it is to the rear or completely to the side with no part of it projecting forward of the house it would be classed as permitted development.
Pitched roof garage planning permission.
Converting a flat garage roof to a pitched roof is a relatively simple job for professional roofing contractors.
However when carrying out larger structural alterations this may be a little more difficult.
Outbuildings and garages to be single storey with maximum eaves height of 2 5 metres and maximum overall height of four metres with a dual pitched roof or three metres for any other roof.
A low pitched roof should be easy enough to gain planning permission for.
You don t need planning permission to replace the roof covering.
The change from a flat roof to a pitched roof is a complex renovation project so before you begin work it is important to work out whether you need to apply for planning permission.
However you will likely need to apply for planning permission as it is not a like for like replacement.
If you alter the height of the roof and this is outside of any permitted development allowance google then you will have to apply for planning permission and building regulation approval woody 17 mar 2008 4.
Always contact your local planning authority to be sure.
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.
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.
Any alteration to project no more than 150 millimetres from the existing roof plane.
When converting your flat roof into a pitched roof that s when planning permission may come into play.
Flat roof garages can also be substantially of non combustible material when the roof is covered with 12 5mm limestone chippings.
Detached garage planning permission england.
Depending on why you want to replaces your roof also means that you have to comply with different rules.
Maximum height of 2 5 metres in the case of a building within 2 metres of a boundary of the curtilage of the main dwelling.
If you re planning make more complex structural alterations it may be best to contact the local planning authority for their advice.
This should be a straightforward process especially if it is a low pitch roof.
To be single storey with maximum eaves height of 2 5 metres and maximum overall height of four metres with a dual pitched roof or three metres for any other roof.
No outbuilding such as a garage on land forward of a wall forming the principal elevation.