Side setbacks, building separation, aural and visual privacy, internal amenity
- It would seem to me that the most contentious element of this application is the projection into the northern side setback of the two proposed blade walls, and to a lesser extent, the projection into the southern side setback of part of the two staircase walls. Apart from the contribution to building bulk, visual impact and the uncharacteristic nature of the blade walls, council's main concerns go to the potential impact on the aural privacy of bedroom windows to the north at no. 20.
- In the circumstances of this site and being a proposal for alterations and additions to an existing block of flats in an area characterised by relatively narrow side setbacks established many years ago, in my view any attempt to press the current side setback and building separation controls would be unreasonable and prevent any practical development on the site. To some extent this is acknowledged by Mr McDonald and council's submissions.
- As considered above, I agree with the applicant that the visual impact of the blade walls and the staircase projections from the street will not be so out of character as to require refusal. The visual impact from no. 20 will be softened by the provision of landscaping - vines and planter boxes. Mr McDonald acknowledges that the impact of the projections of the staircases is relatively minor but nonetheless undesirable.
- In regards to the blade wall projections to the northern bedroom of units 1 and 4, I agree with the applicant that this will provide better visual and aural privacy for occupants of those units and for the occupants of no. 20. The orientation of the window and the outlook onto landscaping/ the golf course provides reasonable internal amenity to those rooms.
- The more problematic elements are the two areas of private open space of units 2 and 5 and the proximity of them to bedrooms at no. 20. Mr Betros' evidence is that: the angle of the walls will project noise away from the adjoining property; the area is small and services a one bedroom apartment; as the end of the blade wall projects past the nearest bedroom windows, the risk of overlooking is minimised; and, the result improves the current situation. Mr McDonald remains concerned that allowing further penetration into a narrow side setback will have unacceptable noise impacts and the size of the space does not provide an adequate area of private open space for those units.
- Having heard the evidence and reviewed the plans, I am satisfied that the blade wall and areas of private open space are acceptable on the basis of visual privacy and amenity as per SEPP 65. In regards to the potential noise impacts, during the hearing I asked the parties to consider some alteration of the angle of the balustrade in order to limit the chances of noise projection from anyone standing at the western end of the balcony. After reviewing the plans, I note that where it abuts the new splayed wall of the extension it provides a space of only 400mm. In the absence of any acoustic evidence, and considering the matters as summarised by Mr Betros above, I am satisfied that the likelihood of noise disturbance from this area is not so unreasonable as to warrant refusal of the proposal. However, in order to minimise the risk, a noise attenuation standard or other acoustic treatment should be applied to the blade walls of units 2 and 5 where they form the outer wall of the areas of private open space as well as acoustic treatment of the floor or ceiling of those areas of private open space. These elements should be included in draft condition of consent 16.