"Whether the erection of the glass balustrade around the perimeter of the flat roof of the ground floor rear extension is or is not permitted development."
"Permitted Development: C Any other alteration to the roof of a dwelling house. Development not permitted: C1 Development is not permitted by class C if it would result in a material alteration to the shape of the dwelling house."
"15 In this case the clear glass balustrade extends across the rear of the house at first-floor level. Although it is not readily visible from public viewpoints in the road, it can be seen from neighbouring buildings and gardens. Applying the test of Burroughs [Day v Bristol City Council[1996] 1 EGLR 167 ], I find that it is more than 'de minimis'. It materially affects the external appearance of the building and would not be excluded from the definition of 'development'."
"31 However answering the question 'Has the shape of the dwelling house been materially altered?' entails a different test. In theory, this is a more objective test, because it entails a straightforward comparison between the overall shape of the house before and after the alteration to the roof was carried out. The answer should be unaffected by individual tastes or preferences, but there are still factors to be weighed in importance. 32 One of these is the reflective quality of the glass and whether or not light glinting off it changes an observer's perceptions of the shape of the house. The council asserts that when viewed from certain vantage points the glazing appears as a solid opaque structure that materially alters the shape of the dwelling house. 33 In my planning judgment, the glass balustrade does not have that effect. I perceive it as a frameless, transparent structure that does not obscure any part of the building and does not alter the 'reading' of its overall shape."
"(5) The permission granted by Schedule 2 shall not apply if - (a) in the case of permission granted in connection with an existing building, the building operations involved in the construction of that building are unlawful; ..... "
"23 When an application for planning consent is made for permission for a single operation, it is made in respect of the whole of the building operation. There are two reasons for this. The first is the practical one that an application for permission partially to erect a building would, save in exceptional circumstances, fail. The second is that the concept of final permission requires a fully detailed building of a certain character, not a structure which is incomplete. This is one of the differences between an outline permission and a final permission: s.92 of the Act. As counsel for Mr Sage accepted, if a building operation is not carried out, both externally and internally, fully in accordance with the permission, the whole operation is unlawful. She contrasted that with a case where the building has been completed but is then altered or improved. This demonstrates the fallacy in Mr Sage's case. He comes into the first category not the second."