The primary judge's reasoning
29 The first issue determined by the primary judge was the proposal's conformity with the relevant planning controls and, in particular, with what her Honour entitled "The Amalgamation and Village Green Components of the DCP". The submission of the Council, as well as May Harlow and Mr Chui, was that the four lots comprising Nos. 20-26 should be amalgamated or, preferably according to the Council's town planner, Nos. 20-28 should be amalgamated. Although it was acknowledged firstly, that cl 14(4A) of the LEP required amalgamation only to be considered and did not mandate it, and secondly, that compliance with the more detailed amalgamation provisions of the DCP was not a necessary pre-condition to the grant of development consent, nonetheless it was submitted that her Honour should not grant consent to Deancliff's development application unless she was satisfied that either the substantive outcomes of the DCP were met by the proposal (which on the Council's evidence would require amalgamation) or amalgamation could no longer occur.
30 The parties seemed to accept, and her Honour so held, that the provisions of the DCP and, in particular, this very detailed site-specific DCP, was required to be considered as a "fundamental element" in, or a "focal point" of, the decision-making process and that, as its provisions were directly pertinent to the determination of the particular development application, its provisions were "entitled to significant weight in the decision making process" although they were not determinative: see Zhang v Canterbury Council (2001) 51 NSWLR 589 at 602 [75] per Spigelman CJ, with whom Meagher and Beazley JJA agreed.
31 Her Honour accordingly considered (at [54]) that she should give significant weight to the wording of the provisions of the DCP and its diagrams. This was so notwithstanding that she found (at [53]) that, although the Council had not approved development throughout the Orara Street precinct in complete accordance with the Masterplan, and had applied a substantial degree of flexibility in its application,
"the Council has nevertheless sought to implement the urban design outcomes of the DCP, to the extent it has been able to do so, given the nature of the development it has been asked to approve. The Council has, for example, been generally successful in having land dedicated for the 'Village Green'. "
32 The critical issue before the primary judge concerned the objective of the Site Amalgamation element that required "integrated development that achieves the required dwelling yields and equitably distributes the development potential over all existing properties". As I have indicated, the relevant Performance Criteria was that
"[t]he development potential of existing properties should be distributed equitably."
33 Her Honour noted (at [38]) that May Harlow and Mr Chiu had argued that a factor to be taken into account in relation to the Performance Criteria which required the development potential of existing properties to be distributed equitably would be the opportunistic exploitation of the prime land within Development Site 4 if the land within that site was not developed together at the one time or was not developed in a fashion that equitably distributed the dwelling yield. Her Honour recorded the argument in these terms:
"For instance, land which is not designated as 'village green' and which faces north and has its outlook over the 'village green', such as the land the subject of the applicant's development application, is favoured when compared to that land which is remote from the 'village green' and without a northern aspect. Thus it would be reasonable to expect that the owner(s) of the land designated 'village green' would seek to recoup some of the locational benefits afforded by this juxtaposition. Accordingly, the Second and Third respondents argued that unless the owner of the 'village green' land is part of the development venture adjoining the 'village green', he or she might not recoup the locational benefits of the adjoining land."
34 The primary judge thus recognised (at [49]) that a key issue in the decision-making process she was required to undertake was the manner in which she applied the Performance Criteria which called for the development potential of existing properties in Development Site 4 to be distributed equitably. Accordingly, it was necessary to ascertain the meaning of the expression "equitable distribution of development potential". Her Honour answered this question in the following terms (at [50]):
"It certainly includes the distribution of dwelling yield. Does it relate to dwelling yield only or, as the Second and Third Respondents submitted, does it extend to locational advantage whereby prime land adjoining the village green has a greater value than land not so located? I accept the Second and Third Respondents' submission that, in order to achieve the urban design objectives of the DCP, it is necessary to take locational advantage into account in considering the 'equitable distribution of development potential'. This is particularly so because unless each landholder within the development site benefits through their landholding, the participation and co-operation of various land holders necessary to achieve the urban design outcomes of the DCP, particularly those relating to the 'village green', cannot be achieved. The locational advantages attaching to the land within Development Site 4, would be likely to be equitably distributed if all the land within that development site were developed at the same time in a related way. As the development sites are reduced in area there is a greater likelihood that locational inequities will result. In the present case if the subject land is developed it will overlook the 'village green'. Consequently, Mr Tanner or his companies, who own the land designated as 'village green' within Development Site 4, would not receive the locational advantages associated with the provision of the 'village green' despite the expectation under the DCP that they dedicate their land for the purpose of the 'village green'. "
35 After referring to authorities such as Zhang and concluding that significant weight should be given to the DCP, her Honour (in [55]) referred to Deancliff's town planner having submitted that an equitable distribution of the dwelling yield in Development Site 4 would be achieved by, inter alia, developing that site in the following two or three amalgamated sub-areas: