The evidence
21 Detailed evidence on behalf of council was given by:
Dr D Wotherspoon; consulting ecologist.
Mr D Kerr; manager strategic planning.
Mr P Robinson; manager development assessment.
Mr A Powe; council's landscape architect.
22 Evidence for the applicant was given by:
Mr R Humphries; consulting ecologist.
Mr Wellington; consulting ecologist.
Ms L Richards; consulting planner.
Dr R Lamb; visual impact consultant.
Site suitability
23 Permissibility; This primary issue involves the consideration of a number of elements to assess the site suitability for the scale of the proposed development. The first matter concerns permissibility of the development under the SEPP provisions, which allows the form of development for 'seniors living' in areas not usually permitted under many LEPs.
24 This element requires careful consideration due to the specific references in the SEPP to the WLEP, whereby the prevailing controls in the SEPP do not apply to land located in identified localities. This situation arises in part because of the use of 'placed based locality statements' instead of conventional zoning in the WLEP.
25 However, as the land is located within the 'B2 Oxford Falls Locality' and adjoins the 'B8 (Red Hill)' urban area, the form of the proposed development is permissible with consent under the provisions of cl 15. Therefore it is appropriate to assess the merits of the proposal.
26 Apart from this, the development of housing for older people or people with a disability is classified as Category 2 under WLEP and is permitted in the Locality B2 - Oxford Falls Valley.
27 Strategic considerations; One of the primary concerns raised is whether the scale, bulk and built form of the proposed development should be approved, relative to its existing bushland context and desired future character (DFC). The court was informed that council has prepared a draft LEP 2009, which recognises the environmental sensitivity of the land and proposes zoning the land as an environmental management zone, whereby the proposal would be prohibited. The council submits that a high level of weight should be given to this as a basis for the refusal of the application.
28 In addition to this, the council evidence is that it is appropriate to take into account the government's "urban strategy", as expressed in the "Metropolitan Strategy", "Draft Subregional Strategy" and the Planning and Assessment Commission's (PAC) "Review of four sites within Oxford Falls Valley for Urban Development".
29 Insofar as the subject application has not been assessed in accordance with the provisions of cl 25 of the SEPP, nevertheless the PAC's review is of some interest because its terms were to assess the urban development capability of other nearby bushland, taking into account the sustainability criteria in the Metropolitan Strategy, the relationship with existing urban development, and the current and potential servicing and transport services.
30 The review noted that an application for a seniors living development had been lodged for the northern part of the Red Hill site. It also referred to the phenomenon of "nibbling", as a significant mechanism by which cumulative impacts can occur over an extended period. The consequences of such nibbling could be the almost complete urbanisation of the remaining bushland in the Valley, unless some clear boundaries can be established on reasonably defined bases.
31 The PAC conclusions include:
That while some areas in the Valley are capable of urban development, others should be protected to enable ongoing conservation and management. However in the longer term the blanket environmental management zone over the entire area would not necessarily be the most appropriate way of ensuring the planning objectives are met.
The likelihood of cumulative impacts is of great concern with the release of the subject 4 sites, taking into consideration the current examination of other nearby Dept of Lands holdings. In the circumstances, it is appropriate that comprehensive planning is undertaken, so the cumulative impacts including the water quality of Narrabeen Lagoon, bushfire hazard and transport linkages are assessed before the land is released for urban development.
The current strategies do not see the need for further urban land releases at this stage and such releases are opposed by the Dept of Planning, particularly on the uncertainty with compliance with sustainability criteria and key constraints.
32 This review confirms the environmental sensitivity of the subject land within its surrounding context and indicates to me that particular attention should be given to the assessment of the compatibility of the proposed development, relative to cl 25(5) and cl 29 of the SEPP and the desired future character considerations.
33 Scale of development; Clause 25 (5) (b) requires an assessment of the compatibility of the development with a number of criteria including the natural environment, access and the impact of bulk, scale and form on approved and future uses of the nearby land. For this assessment I first consider the evidence on site works and then the resultant impacts on the ecological resources.
34 The B2 Oxford Falls Valley Locality Statement prescribes a housing density of 1 dwelling/20 ha, which is a significant indicator of the desired future character of this area. According to the planners, based on the site area of 17.449 ha, the proposal has a housing density of 1 dwelling/0.264 ha. Consequently the planners agree that this development will appear significantly different from that envisaged by the current planning controls.
35 However the provisions of the SEPP nevertheless set this density control, so as to enable approval providing the compatibility criteria is considered. But in doing so the design principles in Division 2 require consideration of any 'desired future character statements' (DFC) to ensure that any new buildings contribute to the quality and identity of the area.
36 Of particular relevance is the Oxford Falls Valley locality DFC states that the present character will remain unchanged except in described circumstances, and
The natural landscape including building platforms and vegetation will be protected and, where possible, enhanced. Buildings will be located and grouped in areas that will minimise disturbance of vegetation and landforms as a result of the buildings themselves or the associated works including access roads and services…
37 As noted previously, the site has 2 distinct topographical areas, being the upper area (plateaux) above the rock embankment where the development is to be undertaken and covering an area of approximately 4 ha. The larger, remaining area is below the embankment and it is not subject to development, except for vegetation clearing to create and maintain the APZs.
38 The concentration of the development on the plateaux involves extensive site regrading to achieve the design density of buildings and infrastructure. This opens up this area to some extent because of the extensive vegetation removal and increases the visibility of the development.
39 By reference to the cut/fill plans in Exhibit H, it is apparent that most of the plateaux area is subject to regrading to accommodate the form of 2 - storey dwellings proposed. These plans show that on the basis of a series of cross sections that there is to an estimated cut of 27000 cu m and fill of 18000 cu m.
40 The building form adopted is to generally follow the natural contours falling to the east but introduce a series of benches that require the construction of a series of retaining walls to obtain acceptable road gradients, which then allow elevated vehicular access to the western side of the upper units and the lower level units obtaining access from the eastern side.
41 As a consequence of this benching, the lower units have a 3m high (approximately) retaining wall compounding their western courtyard, which I consider reduces amenity. There is also the significant retaining wall proposed along the top of the existing sandstone embankment, which ranges in height from about 0.6m to 5m over a distance of about 475m, with an average height in the order of 3m. This then results in most of the dwellings being located above the natural ground levels.
42 Whilst the level of detailing on the plans tendered to the Court is somewhat difficult to interpret, nevertheless reference to the typical cross section 3 (Refer to Attachment 1), shows the major extent of re-contouring the landform to obtain the desired gradients to achieve the appropriate amenity for a senior's type development.
43 In this regard, I note that the SEE states that a comprehensive site analysis was undertaken to achieve a design response where:
The building forms respond sensitively to the character of the existing urban and bushland setting,
The street and block pattern is to be designed to fit with general site contours and step downwards from Lady Penrhyn Drive,
Minimise 'cut and fill' through the design having regard to the topography.
44 However my assessment is that the proposal necessitates a major regrading of the entire building area on this plateaux, in order to achieve reasonable gradients for the retirement village. This is obviously demonstrated by the imposing 475 m retaining wall atop the significant rock embankment.
45 Mr Kerr consequently does not consider the site is suitable for the proposed development as it is not consistent with the desired future character or the scale of development to achieve the outcomes sought after for the B2 Locality because:
The housing density provisions in the WLEP 2000 are for 1 dwelling/20 ha and the proposal significantly exceeds this by 66 times.
The development proposes the removal of approximately 8.1 ha (46%) of the vegetation, which is not considered consistent with the DFC requirement for low environmental impacts.
The development will be visually unsuitable in relation to the visibility of the retaining wall, which will lies generally at the south and eastern extent of the building area whose exposure cannot be satisfactorily enhanced by landscaping. Accordingly the visual impact will be significant and not consistent with the DFC.
The development will disrupt the skyline when viewed from various vantage points in the wider area.
46 Ms Richards disagrees with this opinion and supports the development on the basis that:
In accordance with the authority in Vigour Master Pty Ltd v Warringah Shire Council, the intensity of development will be lower than surrounding land uses and the size/scale of the retirement village will have minimal impact.
The proposed building grouping is a result of a thorough site analysis whereby the buildings have been grouped to comply with the B2 Locality requirements.
The development only requires the removal of 3.92 ha of vegetation, together with the modification of 4.25 ha.
The retaining wall is not proposed to be enhanced by landscaping and its material specification is that it will form a natural and integral part of the landscape over time.
The development is below the ridgeline and will not disrupt the skyline.
47 In the circumstances, my assessment is that the proposed works involve substantial disturbance of the existing vegetation and landform on the plateaux by the benching and retaining walls. Therefore I consider it reasonable to rely on the opinion of Mr Kerr that this proposal represents an overdevelopment, which is not consistent with the provisions of the DFC.
48 Visual impact; A detailed visual analysis from various vantage points was undertaken by Dr Lamb, which was then assessed by Mr A Powe and Mr Robinson. Despite some reservations about the accuracy of the analysis due to the site complexity leading to assumptions about topographical details, this resulted in their agreement that there would be minimal visibility of the development from the lower level Narrabeen Lagoon and therefore would not be inconsistent with the DFC of the B2 Locality.
49 However Mr Powe and Mr Robinson expressed concerns regarding visual impacts from other areas, particularly when the effect of the vegetation removal from the APZ is taken into account. Their main concerns relate to the visual impacts of the proposed retaining wall and the cumulative effect of the resultant buildings and removal of mature vegetation above this retaining wall.
50 They say that from various observation points, the buildings will "present visually as 40m long buildings joined end to end in various configurations across the site. This results in block length configurations of 160m for units 1 - 4, 200m for units 5 - 9, 120m for units 10 - 13 and 80m for units 14, 15." Even though the planning principles accept development, which is compatible with adjacent use, the proposal extends well beyond the B8 locality resulting in unsatisfactory visual impacts.
51 According to Dr Lamb, even though the proposed development is of a different built form character to that adjacent, it would have moderate/ high compatibility with the DFC statement. Furthermore, he considers that appropriate landscaping can be incorporated to mitigate any adverse visual impacts.