“(1) Remove the balcony railings at the roof of the ground floor rear extension. (2) To cease the use of the roof of the ground floor extension as a balcony.”
“It runs the full width of the three-storey end-terrace house (5.34m) and projects some 3.2m from its back wall. The end and side walls (2.9m high) are topped with an up-stand (parapet) some 0.23m above roof level to which are fixed metal railings with a timber handrail. There is no significant dispute between the parties about the relevant measurements. ”
“3. From the appellant’s evidence and the details shown on the plans submitted for building control purposes I take the view that the roof up-stand and railings were erected as an integral part of a single building operation, rather than discreet works carried out after the single storey extension had been completed. Therefore, the key issue was whether the cubic content of the extension as built exceeds the limitations of Class A (a) (i). 4. The council says that the extension has a cubic capacity of 63.79 cubic metres, based on its overall height (to the top of the railings). It is not disputed that without the railings and up-stand the cubic capacity would be less than 50 cubic metres (49.5 cubic metres), but argued thatas these features effectively enlarge the livingspace available to residents of the dwelling calculation of the volume of the extension should be based on its overall height. I do not agree that this is the correct approach because in order to count against cubic capacity tolerances there must be the effect of enclosing some space and creating an identifiable volume. This is not the case with the up-stand wall and railings. 5. Consequently, whilst the materials of the up-stand and railings in themselves have some volume this is all that can realistically count towards the overall cubic content of the extension. The volume of the up-stand wall and railings is difficult to calculate accurately. However, from my observation of the materials used and the nature of construction, taken together with the 11.4m run of wall and railings, I consider that their combined volume, when added to the 49.5 cubic metres contained by the flat roof and main walls would increase the overall cubic capacity of the development to significantly more than 50 cubic metres. Therefore my conclusion is that as a matter of fact and degree the extension as built is not permitted by Class A and that the ground (c) appeal should not succeed.”
“In our view, the time has now come to accept that a mistake of fact giving rise to unfairness is a separate head of challenge in an appeal on a point of law, at least in those statutory context where the parties share an interest in co-operating to achieve the correct result … without seeking to lay down a precise code … at first, there must be a mistake to an existing fact, including a mistake as to the availability of the evidence on a particular matter. Secondly the fact or evidence must have been ‘established’, in the sense that it was uncontentious and objectively verifiable. Thirdly, the appellant, (or his advisers) must not have been responsible for the mistake. Fourthly, themistake must have played a material (not necessarily decisive) part in the Tribunal’s reasoning.”
“2. that an independent joint expert is appointed by the claimant and second defendant to measure the width, height of the existing extension. 3. that the measurement of the height of the extension is taken by excluding the parapet and railings. 4. that the volume of the materials of the parapet and railings is calculated by the independent expert. ”