Most importantly, the visual presentation of the attached dual occupancy building as a 4 storey building instead of a 3 storey building as originally approved by Council has arisen as a consequence of geotechnical and structural engineering requirements to satisfy Conditions 17 and 19 of Development Consent DA 562/2002, noting that Condition 1 of the development consent enables the amendment of the Council approved plans for the proposed dual occupancy building in order to satisfy other conditions of the consent.
26 Mr Player concluded that in considering the totality of the approval the proposal was substantially the same development as originally approved. He held this opinion even if the Construction Certificates and Development Application for the swimming pool were not considered. In his opinion, the changes to the approved development under the conditions of approval relating to landscaping and structural design resulted in a building of the same height, bulk and external appearance as that proposed in the s96 application.
27 Mr Bull held a different opinion in relation to the extent that the structural conditions could permit changes to the approved development. He considered that the changes to the approval as a result of the raft slab would have required a s96 application prior to the issue of the Construction Certificate. He stated that there would have been other options than the raft slab, which would not have resulted in a space that could be converted to a basement, especially when this area had been expressly excluded from the original application. He conceded that the approved landscape plan had changed the landform and increased the height of the podium, however he said that the appearance of the building was different if the lower level was opened up to accommodate floor space. This would appear as an extra floor rather than as a podium to the building, which are common in the Waverley area due to the steeply sloping landform. He considered that the amendment changed the building from a 3 storey to a 4 storey building that was visible from a number of public and private viewing positions. In his opinion the proposal was not substantially the same development.
28 I accept Mr Bull's opinion that a three storey building over a podium or base has a different appearance to a four storey building even if it has the same overall height and bulk. If my assessment of the proposal were limited to a comparison of the approved architectural drawings and the current drawings I would conclude that the amendment is not substantially the same development. The approved plans show a 3 storey building set above an approximately 2m high solid base with the landform terraced to reflect the original slope of the land and extensively landscaped on its side boundaries and its rear eastern terraces. While I would have concerns about the bulk of this development, it would appear as a building that is stepped down the site with its overall bulk mitigated by its response to the slope of the land and landscaping.
29 The landscape plan, which formed part of the approval does not show the same relationship of building to the land. While deficient in detail and levels, it shows a flat rear terrace with perimeter planting and less planting along the side boundaries. The landscape plan that was approved under the conditions of consent reflects this landscape plan rather than the architectural plan and allows a rear terrace at a significantly lower level than the architectural plans and increases the height of the eastern wall of the podium to about 3m. It also permits stairs and terracing along the sides of the building where it was shown in the architectural plans as landscaping. The approval of these landscaped plans changed the appearance of the building from that of a 3 storey building over a podium base to a 4 storey building, with a blank wall at the subfloor level.
30 I do not accept Mr Hudson's submission, for the council, that the approval of the landscape plan required by the conditions related only to the planting and not to the terraces or the levels. If this were the case the terraces and stairs should have been explicitly deleted from the approval. Practically, the treatment of the side boundaries, the relationship of the landscaped planter boxes to the terrace level and the terraces to the building would be inconsistent and undefined. To approve landscaping without understanding its relationship to the surrounding ground levels and building would not make sense.
31 I find that the council, through its approval of the architectural plans and landscape plans has approved the height, external bulk of the building and its relationship to the ground. Externally the appearance of the building as approved by Council is the same as that sought under the s96 application, with the exception of doors to subfloor eastern façade instead of the approved masonry wall and a window and door on the north and south elevation. These external changes do not significantly alter the external appearance of the building and I find that it is substantially the same development.
32 In reaching this conclusion, I note that the onus should be on the Applicant to submit architectural and landscape plans that are consistent and provide sufficient detail. It is open to a council to require further detail to ensure that the interrelationship of the built form and its landscaped setting can be understood. This is particularly important on sloping sites where there is extensive excavation and change to the natural landform, which can effect the appearance of the building. In this case this was not done. The Applicant's submission of inconsistent plans and their subsequent approval by council has resulted in a development not anticipated by the planning controls.
33 Internally, the subfloor/basement space is a result of the information required to satisfy the structural condition. Whether this required a s96 application or not prior to the issue of the Construction Certificate, is not a question before this Court. While the basement is constructed and has been approved under the Construction Certificate it is part of the s96 application for which approval is sought and its merits and impacts must therefore be considered.
34 As I understand the evidence, the basement space results from the geotechnical conditions on the site and the structural design requiring a raft slab. While there may be other designs to meet these constraints these were not presented to the Court. In the absence of other expert evidence, I accept that the raft slab is required which consequently results in the basement space that is substantially below ground level on its north, south and west elevations. The increase in the area of the lower ground floor level is below ground level. The question then becomes one of whether the creation of these spaces is substantially the same development as approved. As the spaces are underground the external appearance of the building does not change to such an extent that it is not substantially the same development. If the basement space remains unused then the development would be clearly the same. But if used, it changes from three habitable floors to four.
35 As stated above, from the east the building as approved appears as four storeys. The question before the Court is therefore whether the use of the basement level is "essentially or materially or having the same essence" as the approved development. The approved development is for a dual occupancy. Each dwelling is a single occupancy. The use of the basement will provide extra space that can be used by the occupants but will not change the essence of the use or add additional uses beyond those reasonably expected from the residential use of a building. I therefore find that the use of the basement is substantially the same development.