(d) In Moto Projects (No 2) Pty Limited v North Sydney Council (1999) 106 LGERA 298 Bignold J analysed the authorities in relation to s 96(2)(a) and the meaning of 'substantially the same.' He said at p 309: "the requisite factual finding obviously requires a comparison between the development, as currently approved, and the development as proposed to be modified. The result of the comparison must be a finding that the modified development is 'essentially or materially' the same as the approved development." He further explained that the comparative task required comparison both in qualitative as well as quantitative terms.
24 The pool, by virtue of condition 1(b), is clearly not part of the approved development. The key question is whether the pool would alter the application without radical transformation and maintain the essential character of the development.
25 In undertaking the comparison between the development as currently approved and as proposed to be modified, I accept Mr Baird's submission that quantitatively and qualitatively the proposed modification will be essentially or materially the same development.
26 The pool will add a new structure, which has impacts that are required to be assessed. However, it does not radically transform or change the essential character of what is approved. A swimming pool is an ancillary part of a residential use of a site for which approval has been granted. The pool does not change the use of the site. It maintains the area of the site used for active recreation, although it adds a structure to this area. The pool is consistent with the description of the development in the Notice of Determination for, inter alia, alterations and additions to existing dwelling and associated works.
Noise impacts
27 Mr S Cooper, acoustic consultant for the applicant, assessed the application. He stated that neither the Environment Protection Authority (EPA) nor council have noise criteria for the use of a swimming pool. He considered the appropriate criteria to be background plus 5dB(A), which is the same criterion for equipment associated with pool use.
28 Mr Cooper noted that the use of an outdoor area of a residential property for active recreation, such as children playing, can generate similar noise levels to that of swimming pools. He stated that lap pools generate less noise than a swimming pool, as the nature of the pool is specifically orientated to swimming for exercise rather than recreation.
29 Mr Cooper recommended a 1.8 metre high lapped and capped timber fence to the eastern boundary of the subject site to ensure compliance with the criterion of background plus 5dB(A).
30 In response to residents' concerns, Mr Cooper recognised that the use of the pool at night by teenagers or large groups would not meet the criterion, but stated that the use of the area for parties or other outdoor uses would also not meet the criterion and that the purpose of the criterion was to control normal use of the pool, not uses such as parties.
31 Ms Wasylenko opposed any increase in the height of the fence, which is currently 1.5 metres, as she considered it would result in increased overshadowing of her property. The increase in 300mm would result in a marginal increase in overshadowing at 3pm in mid-winter. However, when balanced against the acoustic benefits, whether the area is used for a pool or as an active outdoor area, this concern is not justified. The increase in the fence height will also limit the overlooking that currently occurs between the two properties.
32 I accept the evidence of Mr Cooper that the proposal will not result in adverse noise impacts from its normal use as a lap pool.
Excavation
33 Mr S Wiltshire, structural engineer for the council, examined whether the pool can be constructed in a way that will not damage 64A Darling Street and whether sufficient information has been provided. Mr Wiltshire's report summarised his opinion as: