Decision
25 In order that an item be a building or a structure, it does not need to be a fixture, although if it is a fixture, this may be a matter which lends factual support to a conclusion that it is a building or structure.
26 In my opinion, the demountable office is without question a building, even though it is only resting on the ground. The error by the primary judge, in referring to piers set into the ground, was immaterial; and his reasons on this aspect of the case are otherwise correct.
27 As noted above, s.4(2)(b) of the EPA Act provides that a reference in the Act to "the erection of a building" includes a reference to "the placing … of a building on land". Accordingly, if each of these items was a building, there was in each case the erection of a building.
28 The question whether the container was a building is less clear. However, by reason of its size, use and placement, it was in my opinion clearly open to the primary judge to find that, in the circumstances, it was a structure and therefore a building; and no error is disclosed in his reasons.
29 As regards the exceptions in the definition of "building", the only exception possibly applicable is the exception of "a temporary structure within the meaning of the Local Government Act 1993". The relevant definition, set out above, is an inclusive definition; and so the items in question could be temporary structures within the meaning of the LG Act either by reason of the ordinary meaning of the words "temporary structure" or by falling within paragraph (a) or paragraph (b) of the definition. Paragraph (a) clearly has no application.
30 The question whether these items are "temporary structures" in the ordinary meaning of those words, or "mobile structures", is to my mind not an easy one. The primary judge found that they were not fitted with wheels and were not readily moveable, and these findings are unexceptionable; but they are not conclusive. The question addressed by Taylor J in Quarries Limited v. Federal Commissioner of Taxation (1961) 106 CLR 310 was a different question, namely whether certain sleeping units were "plant"; but the comments he made, especially at 316, about these units, which were like the demountable office in this case in that they were moveable with the aid of a mobile crane and semi-trailer, suggest that he may well have considered them as temporary structures.
31 However, if these items were temporary structures within the meaning of the LG Act, so that consent was not required under the EPA Act, consent for their installation was required by s.68 of the LG Act and was not obtained. In circumstances where there is now no live issue about the orders for removal, in my opinion it is not necessary to determine which of these two Acts was breached, and it is preferable to leave determination of this difficult issue to a case where it is necessary to decide it. It is sufficient to say that one or other Act was breached, so that, subject to the question of discretion, the orders made below were justified.
32 Finally, in my opinion, the circumstance that the use of the structures could be considered as "home occupations", and thus as not requiring development consent, does not obviate the need for consents in relation to the erection of buildings or the installation of temporary structures.