Setback
32The council concedes that compliance with the setback control, which is a sliding scale, set out in Part B1.2 of the DCP, is difficult. However the configuration of this proposal as a terrace form with a common wall and nil setback to the northern side at ground floor and first floor and a minimal southern side setback of 900 mm is not justifiable on the site. The pattern of development on Tilba Avenue will be compromised if this subdivision were to be approved, with the zero setbacks as proposed. While the articulation of the built form and gaps between buildings attempts to overcome the noncompliant setback. It is unacceptable on council's evidence. The desired future character statement, in the DCP Part A. 10.6.6, promotes freestanding or detached dwelling forms as being characteristic of this locality and further provides that:
Development visible from the water is to be designed to preserve the conservation values of the area. When viewed from the water a balance between built form and landscape is to be achieved/maintained through side setbacks and landscaping.
33I accept, as Ms Laidlaw pointed out at the view, that side setbacks are essential to achieve the desired future character, particularly when viewed from the water. A terrace form, built on or very close to the side boundaries, conversely is, obviously contrary to this existing and desired future character. Minimal side setbacks on smaller long narrow lots in other parts of the suburb might be justified under the controls.
34However, in this waterfront area where there are larger lots with existing side setbacks (as evidenced by 1A and 7 Tilba Avenue adjoining the site) it is unacceptable to have a nil or 900mm setback at ground level. View corridors to the water from Tilba Avenue are dependant on side setbacks between buildings and the proposal does not provide sufficient set back to allow view corridors to and from the water. The setback at the upper level of the development does not overcome this issue. I accept Ms Laidlaw's evidence that the view from Tilba Avenue through the 900 mm setback at the uppermost floor is compromised because of the overhanging roof design of the carport (which sits over this narrow view corridor) and by the horizontal plane of the first floor built to a nil setback on the northern side.
35I accept, as the Council contends, that when viewed from the water you will see a three-story elevation with, over most that elevation, a 900 mm setback to south and a nil setback to the north. I agree with Miss Laidlaw's statement in the joint report that " This 'higher section' of the building thus makes negligible concession to the DCP's variation criteria that higher sections be setback in accordance with the control ." I accept, as she suggests, that - when viewed from the southern side - the negligible side setback produces a highly unsympathetic wall built close to the boundary with 7 Tilba Avenue, a building which itself provides a generous side boundary setback and is a freestanding form in a garden setting.
36I do not think it is relevant to compare the proposed design to the building that has been demolished, particularly when assessing the impact on 7 Tilba Avenue. The amenity impact - by way of bulk and overshadowing on adjoining properties - particularly 7 Tilba Avenue, provides strong justification for the separation of built form from the boundary by an appropriate side setback. I accept it is irrelevant to consider the contribution that the original building on the site made to the character, because this building no longer exists.
37The gaps proposed between the buildings on either side of the lots in conjunction with the development which exists on 7 Tilba Avenue is not sufficient separation. Side setbacks also have capacity for landscaping, but more importantly, the opportunity to reinforce the detached freestanding dwelling form, and distinguish the character of this area from other areas within the municipality. I accept, as council's evidence suggests, that the rear decks of the properties extend beyond the building location zone (under Part B1.2 of the DCP 2000) and that the development also breaches the foreshore building line. These breaches add to the mass of built form when viewed from the water. I do not accept that the proposal complies with the rear BLZ. A line extending between the rear wall of 1A Tilba Avenue and the rear wall of 7 Tilba Avenue in accordance with the DCP determines the rear BLZ and the front BLZ. According to the to the evidence, this is the same BLZ as applied to development application for the adjoining lot 3 Tilba Avenue.
38I accept that the key planning purpose of the BLZ is to ensure development is sited in the location where it is expected which helps to ensure equity in terms of mutual impacts of bulk, scale, overshadowing and between neighboring properties. Secondly, it helps to ensure consistency in streetscape patterns when viewed for the harbour (exhibit 2, p 12, para 3.2). A distinctive feature of Tilba Avenue is the fact that separation between buildings is achieved, not only by side setbacks but by a garden at the frontage and at the water's edge. This is what occurs on 7 Tilba Avenue and 1A Tilba Avenue. However, in this development, as council points out, there is almost solid wall of development from the back edge of the carports up to the rear building location zone, and the double carports are forward of the building line detract from the streetscape and are contrary to requirements of Part A 10.6.6.
39While the FSR breach is minimal, I accept as council suggests, that the breach is dictated by the necessity to build to the maximum in circumstances where there will be a subdivision into uncharacteristically small lots. It is also the result of the chosen built form which is a relatively bulky and unsympathetic terrace style development proposed on each lot. While the planting of the two-angophora trees at the street frontage is an attempt to provide landscaping, the proposal fails to reflect the character of established development on that street, where a dwelling house is separated from the street by a garden or detached garage. The plantings at the rear of the property toward the seawall are of low shrubs and ground cover and do not promote a balance of built form for landscaping as sought for the desire future character.
40In summary, I accept council's evidence that the proposed development does not step down the topography of the site to reflect the original slope, but rather presents as three-storeys to Iron Cove without any visual material stepping of built form. It does offend the Desired Future Character Statement in of Part A 10.6.6 of the DCP. It does not:
"Conserve and promote the consistent rhythm within the streetscape created by regular lot sizes, subdivision pattern and the predominance of detached and semi-detached houses with a prevalence of hipped, pitched and gable roof forms. Preserve the established setbacks for each street or promote a balance of landscape to built form in the view of the neighbourhood when viewed from the water.."
41In this regard, the proposed development presents as a terraced style development with nil or negligible side setbacks and significant bulk. It does not promote an appearance of a detached freestanding residence. It does not " conserve the single and double storey, freestanding form, style and materials, characteristics to each street ". In the streetscape its form is dominated by garages and driveway crossings. This particularly arises from the development's failure to comply with the controls for side setback and the BLZ under Part B1.2 of the DCP 2000. After a consideration of all of the matters relevant under s 79C(1) including the DCP and the desired future character of the area, I accept council's evidence that the site is not suitable for this development. The court's orders are
(1)The appeal is dismissed.
(2)Development consent to DA/2010/503 for subdivision of lot 12 DP 113 2009, known as 5 Tilba Avenue Balmain and the construction of two three-storey attached dwellings with associated parking landscaping and swimming pools on each lot is refused.
(3)The exhibits returned.
Susan Dixon
Commissioner of the Court
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Decision last updated: 15 July 2011