per Else-Mitchell J in Ryde MC v Royal Ryde Homes (1970) 19 LGRA 321 at 324.
31 Mr Hemmings says that on the true construction of the development consent the roof area could be used for maintenance or even as a rooftop terrace. The consent that was granted was to use the land for a dwelling house. There was no need to specify the use for the roof. There was not in this case, as often is the case, a roof plan which has endorsed on it some statement about the use of the roof. There was simply no roof plan. There was no need to specify the use of the roof. If it was part of the dwelling, then there was consent to use the roof for any purpose.
32 Mr Hemmings submits that the only indication that the roof was not to be so used was the balustrade height of 0.95 metres. However, he puts that this matter cannot be considered when construing the development consent, otherwise one has a situation where the tail wags the dog. The Building Code creates requirements relating to how buildings are to be erected. These provisions cannot inform how a consent permits or does not permit the use of land. There is no authority which authorises one to construe a development consent with reference to the Building Code, and indeed, to do so would be to offend against the principles of construction noted above that these consents are to be read almost as a document of title and are not to be taken to be subject to any other document.
33 There are limited circumstances where one can refer to documents outside the consent when construing it; see eg Alcoa Australia Rolled Products Pty Ltd v Weston Aluminium Pty Ltd (2006) 148 LGERA 439 (NSWCA), but these cases arise infrequently.
34 However, properly read, according to Mr Hemmings, the reference to the Building Code in fact assists the appellants. The condition that the development must be carried out in accordance with the provisions of the Building Code means that even though the plans referred to in general condition 1 specify a height of the parapet wall of 0.95 metres, because the development has to be carried out in accordance with the provisions of the Building Code, one reads that as consent to increase the height of the wall to a minimum of one metre.
35 I find it a little hard to understand why this is so. The plans approved by the consent authority specified that the parapet was to be 0.95 metres in height. It is hard to follow why a general requirement that the development be carried out in accordance with the Building Code of Australia should be seen as altering the specifications incorporated in the approval plans. Why would one give priority, in the case of conflict, to a condition which merely reproduced what was required in any event over a particular condition specific to this particular development?
36 Although one must be careful of applying artificial rules relating to the construction of contracts, it must be pointed out that there are at least two principles of construction pointing in the opposite direction. The first is that where one has conflicting provisions in a contract inter vivos, one prefers the former rather than the latter; and secondly, that when one has a specific condition and a general condition, one prefers the specific rather than the general. To these, in the case of a development consent, one must add the matter that these consents are documents of title in one sense and should be construed by material wholly within them. As has been pointed out in argument, the provisions of the Building Code may very well change from month to month and it may be very difficult in time to come for a successor in title of the appellants to know what was the extent of the consent if it needs to refer back to the Building Code at an earlier date.
37 Another very strong reason as to why one should not adopt this construction is the consent granted was to the erection of a two-storey dwelling and an in-ground swimming pool. That was what the consent concerned; everything else was just a condition. The two-storey dwelling was to be substantially in accordance with the attached drawings. Had the consent been intended to encompass the construction of a building with useable living and recreation space on the third level (both inside and outside), it would not have been expressed as authorising a two-storey dwelling.
38 Counsel took us through the plans on p 230 of the Blue Book and the allied drawing on p 229 being the plans of the lay-out of the basement, ground floor and first floor of the then proposed building. The plans describe what is being erected as "proposed two-storey house".
39 As Mr Hemmings points out, there are some clear suggestions in the plan that there is something on the roof. The main indication is that the plan on p 229 shows a circular staircase around the lift well which has stairs leading upwards from the first floor. The plan on p 230 shows that these steps end in a door which opens out on to the top parapet. It is put that as the dwelling was approved in accordance with those plans, and as nothing to the contrary was said about the use of the roof, use of the roof in connection with the dwelling including recreational purposes was within the consent.
40 In any event it is put that although the balustrade is to be 0.95 metres, there is some ambiguity as to the level from which one measures the 0.95 metres.
41 Accordingly, Mr Hemmings submits that on its true construction, the consent was to the use of the roof area for recreational purposes and that her Honour misunderstood this and thus failed to take into account a consideration relevant to the exercise of her discretion.
42 Mr Robertson, however, says that one has got to look at the EPA Act and the regulations made thereunder. The Environmental Planning and Assessment Regulation 2000 (EPA Regulation), clause 50 and Schedule 1 provide that a development application has to be accompanied by prescribed documents including a sketch of the development, which must indicate, inter alia, "floor plans of any proposed building showing lay-out, partitioning, room sizes and intended uses of each part of the building." The plans and other material supplied did not include any reference whatsoever as to the use of the roof. Nor did it comply with what was required to be submitted under the EPA Regulation. A reader of the plans, including the consent authority, could readily assume that the appellants did not intend to make any use of the roof, certainly not as a recreation area.
43 As has been noted, the application was for a two-storey building and it was that application that the Council approved. The term "storey" is defined in the Sutherland Shire Local Environment Plan, as follows:
"(a) the space between two floors, or
(b) the space between any floor and its ceiling or roof above, or
(c) foundation areas, garages, workshops, storerooms and the like, where the height between ground level and the top of the floor is above 1.5 metres or more."