25 In Parsonage v Ku-ring gai [2004] NSWLEC 347, Senior Commissioner Roseth provides planning principles to assess the impact of solar access on neighbours. The principles of relevance to this appeal are:
· The ease with which sunlight access can be detected is inversely proportional to the density of development. At low densities, there is a reasonable expectation that the dwelling and some of its open space will retain its existing sunlight. (However, even at low densities there are sites and buildings that are highly vulnerable to being overshadowed). At higher densities sunlight is harder to protect and the claim to retain it is not as strong.
· the amount of sunlight lost should be taken into account, as well as the amount of sunlight retained.
· overshadowing arising out of poor design is unacceptable, even if it satisfies numerical guidelines. The poor quality of the proposal's design may be demonstrated by a more sensitive design that achieves the same amenity without substantial additional cost, while reducing the impact on neighbours.
26 In assessing the proposal under these principles, I recognise that the site is zoned Residential 2(b) which is a higher density zone that permits low scale townhouse development. However the application is for a single dwelling house that adjoins townhouse development. The dwelling house therefore has the potential to impact on four townhouses and the standard in the DCP that the existing sunlight not be reduced by more than 30% is considered to be reasonable within this context.
27 I accept that the numerical area of overshadowing that will be lost at midwinter is small however in the context where there is already substantial overshadowing of small courtyard areas this small numerical area in significant.
28 While overall the proposal may not be a poor design, its response to the overshadowing of the adjoining properties to the south is less sensitive than an alternate approach. The alternate scheme prepared by Mr O'Hanlon, while not a design that may suit the applicant, is indicative that there are other solutions that could provide similar accommodation with less overshadowing impact and less bulk.
29 I find that the proposal does not meet the objectives of the DCP in relation to overshadowing and that townhouse seven does not meet the numerical requirements and the proposal has not been designed to minimise loss of sunlight to adjacent buildings where it is feasible to do so. On this basis the application must fail.
Streetscape
30 The residents and Mr Albon raised concerns about the impact of the proposal on the streetscape. In particular, Mr Albon stated that:
The design of the proposed addition represents a reversal to the more standard approach to dwelling house extensions. Generally (but admittedly not without exceptions), the more substantial element of the house addresses the street, augmented by more modest rear extensions, often in the form of single storey pavilion style buildings or "lean to's". This is particularly the case in heritage conservation areas, such as the current circumstances.
This more traditional approach is logical in the sense that it reduces the shadowing, privacy and other impacts associated with more imposing structures encroaching towards the rear of adjoining properties.
31 Mr Hynes, did not accept this proposition and considered that as Luke Street is narrow with only one footpath that adjoins its eastern side, opportunities to view the addition would be limited. He also considered that the relationship between the single storey cottage to be retained at the front and the two-storey addition was acceptable, particularly as the materials on the new and the existing building would be the same. He pointed out other examples of this type of addition in the area.
32 The other examples in the area demonstrate different approaches to adding two-storey elements at the rear of single storey cottages. I accept Mr Albon's evidence that the examples where the addition is sympathetic to the original cottage and which contribute to the streetscape are those where the rear addition is integrated into the form at the front, generally by providing accommodation within a roof form rather than as an extra storey.
33 In the context of two storey adjoining development, placing the two-storey element on the street frontage would also be consistent with the streetscape.
Garden Area
34 The proposal does not meet the requirements in the DCP to provide 50% of the site as garden area. The area proposed is 46%, which is slightly more than the existing amount of garden area. I accept Mr Hynes evidence that the garden area meets the objective in the DCP that gardens are useful, accessible and have adequate sunlight and privacy.