Paragraph 9D F1

the gross floor space of the original building would be exceeded by more than—

whichever is the lesser;

the height of the building as altered or extended would exceed 4 metres;

any part of the development would be within 10 metres of any boundary of the curtilage of the premises;

the development would result in a reduction in the space available for the parking or turning of vehicles; F2...

the development would consist of or include the construction or provision of a veranda, balcony or raised platform;

it would be development described in class 7A(1)

a site of archaeological interest;

a national scenic area;

a historic garden or designed landscape;

a historic battlefield;

a conservation area;

a National Park; or

a World Heritage Site.

any reference to height is a reference to height when measured from ground level and ground level means the level of the surface of the ground immediately adjacent to the building or structure or, where the level of the ground is not uniform, the level of the lowest part of the surface of the ground adjacent to it; and

“raised platform” means a platform with a height greater than 300 millimetres; F4...

F5...